CN115073848A - Composition for preparing conductive polypropylene resin, preparation method and conductive suction head - Google Patents
Composition for preparing conductive polypropylene resin, preparation method and conductive suction head Download PDFInfo
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- CN115073848A CN115073848A CN202210874623.6A CN202210874623A CN115073848A CN 115073848 A CN115073848 A CN 115073848A CN 202210874623 A CN202210874623 A CN 202210874623A CN 115073848 A CN115073848 A CN 115073848A
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- 229920001155 polypropylene Polymers 0.000 title claims abstract description 97
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 95
- -1 polypropylene Polymers 0.000 title claims abstract description 80
- 239000000203 mixture Substances 0.000 title claims abstract description 43
- 239000011347 resin Substances 0.000 title claims abstract description 32
- 229920005989 resin Polymers 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 13
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 13
- 229920000578 graft copolymer Polymers 0.000 claims abstract description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 18
- 230000008018 melting Effects 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 15
- 239000003963 antioxidant agent Substances 0.000 claims description 11
- 230000003078 antioxidant effect Effects 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 111
- 229920000642 polymer Polymers 0.000 description 25
- 239000007788 liquid Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 238000005452 bending Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- DBVUAFDZHKSZJH-UHFFFAOYSA-N furan-2,5-dione;prop-1-ene Chemical group CC=C.O=C1OC(=O)C=C1 DBVUAFDZHKSZJH-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
Abstract
The application relates to a composition for preparing conductive polypropylene resin, a preparation method and a conductive sucker, and specifically, the composition comprises the following components in percentage by weight: and (2) component A: 45-60% of polypropylene; and (B) component: 1-5% of a graft copolymer of maleic anhydride and propylene; and (3) component C: 12.5-37.5% of conductive carbon black-polypropylene particles containing 40% of conductive carbon black by weight; and (3) component D: 12.5-15% of carbon nano tube-polypropylene particles containing 40% of carbon nano tube by weight; and (3) component E: 0-7.5% of superconducting carbon black-polypropylene particles containing 40% of superconducting carbon black in weight ratio; wherein the weight ratio of the component C to the component D is 3: 1-2.5: 3. The conductive polypropylene resin obtained by the method has sufficient and stable main properties.
Description
Technical Field
The present invention relates to a composition for preparing a conductive polypropylene resin, a preparation method thereof, and a conductive tip, and more particularly, to a conductive tip which is a consumable material required for mass and micro transfer of a liquid using a pipette, a composition for preparing a conductive polypropylene resin, and a preparation method thereof.
Background
Pipette tips are generally used for liquid transfer operations and are mostly of a wide-top and narrow-bottom structure. Existing pipette tips can be classified into manual and automatic types, depending on the nature of the pipettor itself with which it is adapted for use. Manual pipette tips, i.e., conventional tips, are typically made of an insulating material, such as polypropylene or the like; automatically operated pipette tips, i.e. electrically conductive tips or electrically conductive pipette tips, are usually prepared from materials such as polypropylene in combination with electrically conductive graphite. In the use process, the manual pipettor needs a user to control the uplink and downlink positions of a piston in the pipettor, the scales are marked outside a needle cylinder connected with a conventional sucker by the pipettor, and the scales correspond to the measuring range of the specifically used conventional sucker, so that the situation that the piston and corresponding equipment are damaged due to the fact that the liquid is sucked into the pipettor by the user when the liquid is sucked by the user is avoided. An automatically operated pipette is generally under program control, and has the same control on the up-and down-going position of a piston in the pipette, and only the manual operation is changed into the electromechanical operation. When the liquid is used for micro-sucking liquid, or liquid is required to be sucked in batches, or the sucked liquid has certain toxicity or infectivity (such as the field of biological pharmacy and the like), the automatic operation pipette is more beneficial to a manual pipette, and therefore, the conductive suction head has higher market value than the conventional suction head.
Furthermore, at present, most of the conductive suction heads are prepared by adding conductive components, such as conductive graphite or conductive carbon black, to the preparation composition and preparation method of the conventional suction head; however, in order to apply the conductive suction head to precise electronic equipment, the resistance value needs to reach 3 to 5 th power of 10, if the resistance value needs to reach 3 to 5 th power of 10, the addition amount of the conductive carbon black is large and usually needs to be more than 20 percent, the addition amount can reduce the strength of the obtained conductive suction head, and carbon black particles (with insufficient surface smoothness) are easy to fall off from the surface to pollute contact liquid and instruments; for this reason, it is possible to achieve sufficient conductivity and surface smoothness by replacing or combining conductive carbon black with superconducting carbon black or carbon nanotubes, but in the practical application, it is found that the strength, conductivity stability, etc. of the resulting conductive tip cannot achieve satisfactory values regardless of the superconducting carbon black or carbon nanotubes.
For example, in patent CN113004612A, no matter the conductive polypropylene composite material disclosed therein is prepared by a conventional preparation method (comparative examples 1 to 3) or a preparation method based on superconducting master batch (examples 1 to 7), the obtained conductive tip still cannot obtain a good value or has an unstable value in specific strength or conductivity, and the performance is often not stable enough due to the small addition amount of the conductive component.
Disclosure of Invention
The purpose of the present application is to provide a composition for producing a conductive polypropylene resin, a production method, and a conductive tip, which can obtain a conductive polypropylene resin having sufficient and stable main properties. The device is particularly suitable for micro-scale liquid suction, or liquid suction in batches, or liquid suction with certain toxicity or infectivity (such as the field of biological pharmacy).
The first scheme provided by the application is as follows:
a composition for preparing an electrically conductive polypropylene resin, the composition comprising the following components in weight percent: and (2) component A: 45-60% of polypropylene; and (B) component: 1-5% of a graft copolymer of maleic anhydride and propylene; and (3) component C: 12.5-37.5% of conductive carbon black-polypropylene particles containing 40% of conductive carbon black by weight; and (3) component D: 12.5-15% of carbon nano tube-polypropylene particles containing 40% of carbon nano tube by weight; and (3) component E: 0-7.5% of superconducting carbon black-polypropylene particles containing 40% of superconducting carbon black in weight ratio; wherein the weight ratio of the component C to the component D is 3: 1-2.5: 3.
Optionally, the component C is prepared by mixing, heating and melting 55 wt% of polypropylene, 40 wt% of conductive carbon black, 4 wt% of dispersant and 1 wt% of antioxidant.
Optionally, the component D is prepared by mixing, heating and melting 55 wt% of polypropylene, 40 wt% of carbon nanotubes, 4 wt% of a dispersant and 1 wt% of an antioxidant.
Optionally, the component E is prepared by mixing, heating and melting 55 wt% of polypropylene, 40 wt% of superconducting carbon black, 4 wt% of dispersant and 1 wt% of antioxidant.
Optionally, the weight ratio of the component C to the component D is 3: 2-2.5: 3.
Optionally, the particle size of any polypropylene component in the components A to E is 500 to 1000 microns.
The application also provides a preparation method of the conductive polypropylene resin, which comprises the steps of weighing the components according to the weight ratio, mixing the materials at the temperature of 160-180 ℃, uniformly stirring, and extruding to obtain the conductive polypropylene resin.
The application also provides a conductive suction head, the conductive suction head is for adopting the aforesaid the composition mixing melting moulding form, or adopt the aforesaid conductive polypropylene resin form through the moulding preparation of melting.
The composition for preparing the conductive polypropylene resin not only fuses components such as polypropylene, maleic anhydride-propylene polymer, conductive carbon black and carbon nano tubes, but also adopts a mode of firstly preparing fused particles of the components and the polypropylene for the conductive carbon black and the carbon nano tubes, and then mixing the obtained fused particles with the polypropylene and the maleic anhydride-propylene polymer to prepare the conductive polypropylene resin.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of embodiments of the present application, as generally described and illustrated herein, may be arranged and designed in a wide variety of different configurations.
The formulation components of the present application are illustrated below:
compared with the prior art, the formula adopted by the application contains 45-60% of polypropylene resin (component A); 1-5% of a graft copolymer of maleic anhydride and propylene (component B); 12.5-37.5% of conductive carbon black-polypropylene particles (component C) containing 40% of conductive carbon black by weight; 12.5-15% of carbon nano tube-polypropylene particles (component D) containing 40% of carbon nano tube by weight; furthermore, 0-7.5% of superconducting carbon black-polypropylene particles (component E) containing 40% of superconducting carbon black in weight proportion can be additionally contained; wherein the weight ratio of the component C to the component D is 3: 1-2.5: 3.
In the formula components, the polypropylene in the components A-B and the components C-E in the formula plays a role of main filler, namely, the polypropylene plays a role of supporting a skeleton of a conductive component; the upper limit of the components can be 93 percent of the total weight of the composition by conversion, and if the upper limit is exceeded, the conductivity of the obtained polypropylene conductive composition is influenced; more preferably, the upper limit of the polypropylene component may be 90%, 86%, 85%, 80%, 75%.
In addition, the lower limit of the polypropylene component is 58.75% by weight of the composition, and below this lower limit, the skeleton of the conductive component is not maintained; more preferably, the lower limit of the polypropylene component may be 60%, 62%, 63%, 64%, 65%.
Similarly, the total weight of the conductive carbon black, carbon nanotubes and superconducting carbon black as the conductive component accounts for an upper limit of, for example, 24% and a lower limit of, for example, 10% of the total weight of the composition; too much conductive component is not favorable for forming the whole skeleton, and too little conductive component has influence on the resistance value of the obtained conductive polypropylene polymer.
For the composition, any component is the key for obtaining the specific performance of the conductive polypropylene polymer, and even in the case of adding the superconducting carbon black component, the polypropylene, the dispersant and the antioxidant need to be heated, melted and cooled into uniform particles before being used as one of the components of the composition. Therefore, the improvement of the existing formula of the application not only selects the components, but also adjusts the adding mode of the components so as to obtain the conductive polypropylene resin with more balanced performance. Therefore, compared with the above documents, the present application can obtain more stable performance data than the above documents by using the newly selected components and the corresponding mixture ratio and component preparation method.
Of the above components, component A in the composition of the present application also has upper and lower limits in content, even though the upper limit limits the polypropylene component to 93%, the upper limit is not preferably too high, e.g., 60%, for component A without any conductive component added thereto, and exceeding this upper limit affects the distribution of the conductive component by other components and the degree of dispersion and melting with the polypropylene. More preferably, the upper limit of the component a may be further preferably 59%, 58%, 57%, 56%, 55%.
In addition, the lower limit of component A is 45% of the total weight of the composition, and below this limit, the distribution of the conductive component by the other components and the degree of dispersion and melting with the polypropylene are also affected. More preferably, the lower limit of the component A may be further preferably 46%, 47%, 48%, 49%, 50%.
Among the above components, component B, one of the components, functions as a filler to a certain extent, and can adjust the properties of the obtained conductive polypropylene polymer to a certain extent; the content of the component can be selected to be 1-5% of the total weight of the composition, and the performance of the conductive polypropylene polymer can be influenced to a certain extent by excessive or no component B.
Among the above components, the component C, as a particle added with one of the conductive components, can not only provide the skeleton support of the polymer, but also provide the conductive performance for the polymer, for example, when the upper limit is 37.5% of the total weight of the composition, and the lower limit is 12.5% of the total weight of the composition, the conductive capability and various strength values of the conductive polypropylene polymer of the present application can be effectively improved; more preferably, the upper limit is further selected to be 35%, 33%, 30%, and the lower limit is further selected to be 15%, 18%, 20%.
Among the above components, component D, as a particle to which one of the conductive components is added, can not only provide a skeleton support of the polymer, but also provide a conductive property to the polymer, for example, when the upper limit is 15% of the total weight of the composition, and the lower limit is 12.5% of the total weight of the composition, the conductive capability and various strength values of the conductive polypropylene polymer of the present application can be effectively improved.
Among the above components, component E, as particles to which one of the conductive components is added, not only provides a skeleton support of the polymer but also provides conductivity to the polymer. The component E is not one of the components which are necessarily added, but in the alternative, the component E can be added according to the actual requirement to improve the conductivity and various strength values of the conductive polypropylene polymer, and the optional range is 0 to 7.5 percent of the weight of the composition.
The weight ratio of the component C to the component D in the composition is 3: 1-2.5: 3; within this weight ratio range, the properties, especially the strength, of the resulting conductive polypropylene polymer can be further adjusted. The weight ratio is preferably 3:2 to 2.5: 3.
The composition of the present application is prepared by preparing the above components, especially polypropylene particles added with various conductive components, and for example, the composition can be prepared by mixing, heating and melting the conductive components, polypropylene, dispersant and antioxidant at a preferred ratio at 160-180 ℃. The obtained particles are mixed with the component A and the component B to obtain the conductive polypropylene resin through a conventional preparation method of the conductive polypropylene polymer, for example, the obtained components are mixed at the temperature of 160-180 ℃, uniformly stirred and extruded to obtain the conductive polypropylene resin.
In addition, the conductive suction head can be formed by uniformly mixing, melting and molding the composition or by melting and molding the conductive polypropylene resin.
The preparation equipment and the like used in the present application may also employ conventional equipment, and may also employ, for example, an internal mixer, a heat stirrer, and the like.
The ingredients or components used in the present application can be obtained commercially or by self-made means. For example, component A can be selected to be Taihua K1011 or K8003, and component B can be selected to be Angie GR 6001.
The performance detection method and the test parameters of the conductive polypropylene resin (which can be used as a detection sample of a conductive suction head) obtained by the method are as follows:
among the above properties, the melt index is measured at the time of preparing the obtained conductive polypropylene resin or the melt index of the conductive polypropylene resin, that is, the gram number of the composition or the conductive polypropylene resin melted into a plastic fluid and flowed out under the above measurement conditions. The larger the value, the better the processing flowability of the plastic material, and conversely the worse.
The density means the density of the resulting conductive polypropylene polymer, which is the conventional density meaning.
The tensile strength, i.e., tensile strength, is obtained by testing the conductive polypropylene polymer and refers to the resistance to the maximum uniform plastic deformation of the tested material. The larger the value, the stronger the tensile deformability.
Elongation at break is the ratio of the displacement value at tensile failure of the test specimen to the original length, expressed in percent (%), which is also the property obtained by testing the conductive polypropylene polymer, the greater the value, the stronger the toughness.
Flexural strength refers to the maximum stress that a material can withstand when it breaks under a bending load or reaches a specified deflection, and is the value obtained by testing conductive polypropylene polymers. The larger the value, the stronger the bearing capacity of the material.
The flexural modulus, i.e., the ratio of the bending stress to the deformation caused by bending, characterizes the ability of the material to resist bending deformation within the elastic limit, a value obtained by testing conductive polypropylene polymers. The larger the value is, the stronger the deformation resistance is, under the same bending stress.
Impact strength, i.e., the energy absorbed per unit cross-sectional area when the test specimen is broken or fractured under an impact load, is the value obtained by testing the conductive polypropylene polymer.
The thermal denaturation temperature is a temperature corresponding to a certain deformation when a certain load is applied to the high molecular material or the polymer and the temperature is raised at a certain speed; i.e., a measure of the heat resistance of a polymer or a polymer material. This value is obtained by testing the conductive polypropylene polymer.
The surface resistance value is called surface resistance in short, and is the ratio of the direct current voltage between two points on the surface of the material to the passing current, and the unit is omega (ohm). This value is obtained by testing the conductive polypropylene polymer.
In the above detection manner, the formula of the present application is detected according to the specific component ratios in tables 1 to 2 below, each component is prepared by the weight percentage of the composition, and the obtained detection results can refer to tables 3 to 4.
Wherein the components A to E respectively refer to:
and (2) component A: 45-60% of polypropylene;
and (B) component: 1-5% of a graft copolymer of maleic anhydride and propylene;
and (3) component C: 12.5-37.5% of conductive carbon black-polypropylene particles containing 40% of conductive carbon black by weight;
the component C can be prepared by mixing, heating and melting 55% of polypropylene resin, 40% of conductive carbon black, 4% of dispersant and 1% of antioxidant by weight.
And (3) component D: 12.5-15% of carbon nano tube-polypropylene particles containing 40% of carbon nano tube by weight;
the component D can be prepared by mixing, heating and melting 55% of polypropylene resin, 40% of carbon nano tubes, 4% of dispersing agent and 1% of antioxidant by weight.
And (3) component E: 0-7.5% of superconducting carbon black-polypropylene particles containing 40% of superconducting carbon black in weight ratio;
the component E can be prepared by mixing, heating and melting 55 wt% of polypropylene resin, 40 wt% of superconducting carbon black, 4 wt% of dispersant and 1 wt% of antioxidant.
The particle size of any polypropylene component in the components A to E is preferably 500 to 1000 microns.
TABLE 1 data units/%)
| Examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Component A | 45.00 | 60.00 | 48.00 | 50.00 | 54.08 | 53.27 | 55.00 | 58.02 |
| Component B | 5.00 | 5.00 | 2.00 | 3.05 | 4.55 | 4.05 | 5.00 | 1.00 |
| Component C | 37.50 | 20.00 | 35.00 | 32.20 | 28.32 | 27.68 | 27.50 | 25.98 |
| Component D | 12.50 | 15.00 | 15.00 | 14.75 | 13.05 | 15.00 | 12.50 | 15.00 |
| Component E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
TABLE 2
| Examples | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Component A | 45.00 | 60.00 | 45.44 | 50.00 | 54.08 | 53.27 | 48.85 | 56.52 |
| Component B | 5.00 | 5.00 | 2.00 | 2.46 | 4.55 | 4.05 | 5.00 | 1.00 |
| Component C | 36.48 | 12.50 | 35.00 | 30.20 | 24.32 | 22.48 | 27.50 | 25.98 |
| Component D | 12.50 | 15.00 | 15.00 | 13.75 | 13.05 | 15.00 | 12.50 | 15.00 |
| Component E | 1.02 | 7.50 | 2.56 | 3.59 | 4.00 | 5.20 | 6.15 | 1.50 |
The following table shows the performance parameters of the above examples 1-16 after the above testing method.
TABLE 3
| Examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Apparent mass | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean |
| Melt index | 29.1 | 29.2 | 28.3 | 28.5 | 28.7 | 28.6 | 29.1 | 29.5 |
| Density of | 1.04 | 1.05 | 1.06 | 1.04 | 1.07 | 1.03 | 1.02 | 1.04 |
| Tensile strength | 23.1 | 23.0 | 23.2 | 23.4 | 23.1 | 23.2 | 23.3 | 23.2 |
| Elongation at break | 15.3 | 15.0 | 15.2 | 15.1 | 15.2 | 15.1 | 15.3 | 15.0 |
| Bending strength | 27.3 | 27.4 | 27.1 | 27.5 | 27.3 | 27.4 | 27.1 | 27.3 |
| Flexural modulus | 1855 | 1856 | 1871 | 1845 | 1856 | 1854 | 1857 | 1861 |
| Impact strength | 4.0 | 4.1 | 4.1 | 4.0 | 3.9 | 4.0 | 4.0 | 4.1 |
| Heat distortion temperature | 50.1 | 50.2 | 50.2 | 50.1 | 50.0 | 50.1 | 50.1 | 50.2 |
| Surface resistance value/10 4 Ω | 1.01 | 1.02 | 1.01 | 1.01 | 0.90 | 0.91 | 0.98 | 0.95 |
TABLE 4
| Examples | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Apparent mass | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean | Bright and clean |
| Melt index | 28.4 | 28.6 | 29.5 | 29.1 | 29.2 | 29.4 | 29.5 | 28.3 |
| Density of | 1.06 | 1.05 | 1.04 | 1.05 | 1.03 | 1.02 | 1.06 | 1.05 |
| Tensile strength | 23.2 | 23.4 | 23.1 | 23.2 | 23.1 | 23.3 | 23.2 | 23.4 |
| Elongation at break | 15.2 | 15.4 | 15.3 | 15.2 | 15.2 | 15.3 | 15.2 | 15.4 |
| Bending strength | 27.1 | 27.2 | 27.5 | 27.1 | 27.4 | 27.3 | 27.1 | 27.3 |
| Flexural modulus | 1854 | 1857 | 1852 | 1865 | 1871 | 1858 | 1859 | 1849 |
| Impact strength | 4.2 | 4.1 | 4.0 | 4.0 | 4.1 | 4.0 | 4.1 | 3.9 |
| Heat distortion temperature | 50.1 | 50.2 | 50.1 | 50.1 | 50.2 | 50.1 | 50.2 | 50.0 |
| Surface resistance value/10 4 Ω | 1.00 | 1.01 | 1.00 | 1.02 | 0.98 | 0.97 | 0.99 | 0.98 |
The foregoing examples 1-16, and the foregoing description, all clearly and completely demonstrate that the various performance parameters obtained from the conductive tip compositions provided herein for use in the preparation of conductive polypropylene resins are comparable in value to those of the related art documents mentioned in the background, but are capable of stably maintaining, for example, melt index, elongation at break, flexural modulus, notched impact strength; certain properties are more excellent than those of the aforementioned related documents, such as tensile strength, bending strength; certain properties are not only more excellent than those of the aforementioned related documents but also stably maintained, for example, surface resistance values.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A composition for producing an electrically conductive polypropylene resin, characterized in that: the composition comprises the following components in percentage by weight: and (2) component A: 45-60% of polypropylene; and (B) component: 1-5% of a graft copolymer of maleic anhydride and propylene; and (3) component C: 12.5-37.5% of conductive carbon black-polypropylene particles containing 40% of conductive carbon black by weight; and (3) component D: 12.5-15% of carbon nano tube-polypropylene particles containing 40% of carbon nano tube by weight; and (3) component E: 0-7.5% of superconducting carbon black-polypropylene particles containing 40% of superconducting carbon black in weight ratio; wherein the weight ratio of the component C to the component D is 3: 1-2.5: 3.
2. The composition of claim 1, wherein the component C is prepared by mixing, heating and melting 55% of polypropylene, 40% of conductive carbon black, 4% of dispersant and 1% of antioxidant by weight percentage.
3. The composition of claim 1, wherein the component D is prepared by mixing, heating and melting 55% of polypropylene, 40% of carbon nanotubes, 4% of a dispersant and 1% of an antioxidant by weight.
4. The composition of claim 1, wherein component E is prepared by melting and heating 55 wt% of polypropylene, 40 wt% of superconducting carbon black, 4 wt% of dispersant and 1 wt% of antioxidant.
5. The composition of claim 1, wherein the weight ratio of component C to component D is 3:2 to 2.5: 3.
6. The composition of claim 1 wherein any polypropylene component of component a through component E has a particle size of 500 to 1000 microns.
7. The preparation method of the conductive polypropylene resin is characterized by comprising the following steps: weighing the components according to the weight ratio of the conductive polypropylene resin in the claim 1, mixing the materials at the temperature of 160-180 ℃, uniformly stirring, and extruding to obtain the conductive polypropylene resin.
8. The conductive suction head is characterized in that the conductive suction head is formed by uniformly mixing, melting and molding the composition of claim 1, or is formed by melting and molding the conductive polypropylene resin of claim 7.
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| CN202210874623.6A CN115073848A (en) | 2022-07-25 | 2022-07-25 | Composition for preparing conductive polypropylene resin, preparation method and conductive suction head |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054835A (en) * | 2019-03-27 | 2019-07-26 | 无锡会通轻质材料股份有限公司 | A kind of preparation method of high magnification conductivity type polypropylene foaming beads |
| CN112538219A (en) * | 2020-12-09 | 2021-03-23 | 金发科技股份有限公司 | Polypropylene composition and preparation method thereof |
| CN113502017A (en) * | 2021-07-16 | 2021-10-15 | 中广核俊尔(浙江)新材料有限公司 | High-fluidity high-surface-smoothness conductive polypropylene composite material and preparation method thereof |
| WO2022110655A1 (en) * | 2020-11-27 | 2022-06-02 | 金发科技股份有限公司 | Conductive polypropylene composition and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054835A (en) * | 2019-03-27 | 2019-07-26 | 无锡会通轻质材料股份有限公司 | A kind of preparation method of high magnification conductivity type polypropylene foaming beads |
| WO2022110655A1 (en) * | 2020-11-27 | 2022-06-02 | 金发科技股份有限公司 | Conductive polypropylene composition and preparation method therefor |
| CN112538219A (en) * | 2020-12-09 | 2021-03-23 | 金发科技股份有限公司 | Polypropylene composition and preparation method thereof |
| CN113502017A (en) * | 2021-07-16 | 2021-10-15 | 中广核俊尔(浙江)新材料有限公司 | High-fluidity high-surface-smoothness conductive polypropylene composite material and preparation method thereof |
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Application publication date: 20220920 |