CN113583361A - Heat-conducting polyvinyl chloride and preparation method thereof - Google Patents
Heat-conducting polyvinyl chloride and preparation method thereof Download PDFInfo
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- CN113583361A CN113583361A CN202110873011.0A CN202110873011A CN113583361A CN 113583361 A CN113583361 A CN 113583361A CN 202110873011 A CN202110873011 A CN 202110873011A CN 113583361 A CN113583361 A CN 113583361A
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 68
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims description 10
- 229910052582 BN Inorganic materials 0.000 claims abstract description 54
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229920006150 hyperbranched polyester Polymers 0.000 claims abstract description 32
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000004014 plasticizer Substances 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 11
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 37
- 238000002156 mixing Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 239000003960 organic solvent Substances 0.000 claims description 16
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 15
- 239000006084 composite stabilizer Substances 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 13
- 238000007731 hot pressing Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 6
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 4
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 3
- NFVZIERLAZUYBQ-UHFFFAOYSA-N [K].[Zn] Chemical compound [K].[Zn] NFVZIERLAZUYBQ-UHFFFAOYSA-N 0.000 claims description 3
- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 238000002390 rotary evaporation Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- DECPGQLXYYCNEZ-UHFFFAOYSA-N tris(6-methylheptyl) phosphite Chemical compound CC(C)CCCCCOP(OCCCCCC(C)C)OCCCCCC(C)C DECPGQLXYYCNEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 2
- 239000002135 nanosheet Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 description 14
- 239000004033 plastic Substances 0.000 description 14
- 239000006185 dispersion Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910044991 metal oxide Inorganic materials 0.000 description 5
- 150000004706 metal oxides Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
Abstract
The invention discloses a heat-conducting polyvinyl chloride, which comprises: 100 parts by weight of polyvinyl chloride master batch, 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer, 0.1-5 parts by weight of lubricant, 1-20 parts by weight of hyperbranched polyester and 0.1-10 parts by weight of boron nitride; the boron nitride is uniformly dispersed in the polyvinyl chloride with the assistance of the hyperbranched polyester to form a heat-conducting network. According to the invention, by adding hyperbranched polyester and utilizing the unique spherical multi-branch structure of the hyperbranched polyester, the effect of effectively stripping boron nitride is achieved, and boron nitride nanosheets which are not easy to agglomerate are obtained; meanwhile, the hyperbranched polyester has good solubility in polyvinyl chloride, and the boron nitride nanosheets adsorbed on the hyperbranched polyester can be well mixed with polyvinyl chloride, so that the boron nitride is assisted to be stably and uniformly dispersed in the polyvinyl chloride, the boron nitride nanosheets form a heat conducting network in the polyvinyl chloride, the heat conductivity of the polyvinyl chloride is remarkably improved, and the transparency and the toughness are also improved.
Description
Technical Field
The invention relates to the technical field of heat conduction materials, in particular to heat conduction polyvinyl chloride and a preparation method thereof.
Background
Polyvinyl chloride (PVC) is one of five general plastics, which are widely applied in daily life due to good performance and low manufacturing cost, but PVC belongs to a plastic family, which has a common problem that the plastic has poor heat conductivity and is not resistant to high temperature, and the heat conductivity is very low compared with metal, so that the plastic cannot work under the condition of high temperature for a long time, therefore, metal or metal oxide with more excellent heat conductivity is adopted in many technical fields, but the metal or metal oxide is difficult to process and has high manufacturing cost, and the development of heat-conducting plastic is necessary.
The PVC product has the advantages of convenient processing, energy conservation, emission reduction, renewable production and low manufacturing cost, and the light transmission of the currently developed heat-conducting plastic is generally added with nano metal oxide particles, but the compatibility of the nano metal oxide particles and the plastic product is not good, and the modification effect of the nano metal oxide particles as one-dimensional fillers on high polymer materials is not good. Meanwhile, in an attempt to add boron nitride into a plastic product, the boron nitride is of a two-dimensional lamellar structure, the structure of the boron nitride is similar to that of graphene, but the thermal conductivity of the boron nitride modified plastic product is not higher than that of the boron nitride modified plastic product before addition, because the acting force between the boron nitride lamellar layers is large and easy to agglomerate, a two-dimensional heat conduction network is difficult to form in the plastic product, if the purpose of good heat conduction is achieved, a large amount of boron nitride must be added, and the transparency and the toughness of the plastic product are poor due to the addition of excessive boron nitride. Therefore, the existing heat-conducting and light-transmitting plastics have more or less problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the heat-conducting polyvinyl chloride which has the advantages of high heat conductivity, good light transmittance, smooth surface, low cost, simple preparation method, no toxic substance release in the preparation process and contribution to environmental protection.
The invention also aims to provide a preparation method of the heat-conducting polyvinyl chloride.
In order to achieve the purpose, the invention adopts the following technical scheme:
a thermally conductive polyvinyl chloride comprising: 100 parts by weight of polyvinyl chloride master batch, 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer, 0.1-5 parts by weight of lubricant, 1-20 parts by weight of hyperbranched polyester and 0.1-10 parts by weight of boron nitride; the boron nitride is uniformly dispersed in the polyvinyl chloride with the assistance of the hyperbranched polyester to form a heat-conducting network.
As a preferable scheme, the polyvinyl chloride master batch is selected from one or more of polyvinyl chloride resins of SG 1-SG 8 types.
Preferably, the plasticizer is at least one selected from dioctyl phthalate, diisononyl phthalate, triisooctyl phosphite and dibutyl phthalate.
In a preferred embodiment, the stabilizer is at least one selected from the group consisting of a lead salt composite stabilizer, an OBS organic-based stabilizer, an organotin stabilizer, a liquid composite stabilizer, a calcium-zinc composite stabilizer, a barium-zinc composite stabilizer, and a potassium-zinc composite stabilizer.
Preferably, the lubricant is polyethylene wax.
Preferably, the particle size of the boron nitride is 0.5-50 μm.
A preparation method of heat-conducting polyvinyl chloride comprises the following steps:
the method comprises the following steps: mixing 1-20 parts by weight of hyperbranched polyester and 0.1-10 parts by weight of boron nitride, dissolving the mixture in an organic solvent to form an initial mixture, treating the initial mixture by using ultrasonic waves to enable the boron nitride to form stably dispersed few-layer boron nitride in the organic solvent, and removing the organic solvent to obtain a first mixture consisting of the hyperbranched polyester and the few-layer boron nitride;
step two: mixing 100 parts by weight of polyvinyl chloride master batch, 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer and 0.1-5 parts by weight of lubricant to form a second mixture;
step three: mixing and stirring the first mixture and the second mixture to form a third mixture, and putting the third mixture on a double-roller mixing mill for double-roller mixing, wherein the temperature of the double rollers is controlled to be 140-190 ℃, the speed ratio of the front roller to the rear roller is 1:1.2, the roller distance between the double rollers is 0.2-0.7 mm, and the mixing time is 3-10 min;
step four: and (3) placing the mixed third mixture in a hot press for hot pressing, wherein the preheating time of the hot pressing is 2-5 min, carrying out half pressing after the preheating is finished, the half pressing time is 2-5 min, wherein the air is discharged for three to five times, then carrying out full pressing, the full pressing time is 2-7 min, the hot pressing temperature is controlled at 140-190 ℃, and finally cooling for 3-5 min to obtain the heat-conducting polyvinyl chloride.
As a preferable embodiment, the organic solvent is at least one selected from chloroform, tetrahydrofuran, petroleum ether and diethyl ether.
Preferably, in the first step, the method for removing the organic solvent is selected from one of a purging method and a rotary evaporation method.
As a preferable scheme, in the third step, before mixing, the third mixture is put into an oven for constant temperature treatment for 3-60 min, and the temperature of the oven is set at 40-60 ℃.
Compared with the prior art, the preparation method has obvious advantages and beneficial effects, and specifically, the hyperbranched polyester is added, and the unique spherical multi-branch structure of the hyperbranched polyester is utilized, so that the effect of effectively stripping boron nitride is achieved, and the boron nitride nanosheet which is not easy to agglomerate is obtained; meanwhile, the hyperbranched polyester has good solubility in polyvinyl chloride, and boron nitride nanosheets adsorbed on the hyperbranched polyester can be well mixed with polyvinyl chloride, so that the phenomenon of uneven dispersion cannot occur, and therefore, the stable and even dispersion of boron nitride in polyvinyl chloride is assisted, and the boron nitride nanosheets form a heat conducting network in the polyvinyl chloride, so that the heat conductivity of the polyvinyl chloride is remarkably improved under the condition of reducing the using amount of the boron nitride, and the transparency and the toughness of the heat conducting polyvinyl chloride are also improved. The heat-conducting polyvinyl chloride has the advantages of low cost, high heat conductivity, easy processing, difficult aging, simple forming method, capability of being prepared into various shapes and no pollution, can be applied to wider fields, such as being drawn into a tube to be used as a lampshade of a decorative lamp, can also be used in the aviation field, can insulate, conduct heat and resist oxidation stably.
To more clearly illustrate the structural features and technical means of the present invention and the specific objects and functions attained thereby, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:
drawings
FIG. 1 is a flow chart of the process for preparing thermally conductive polyvinyl chloride of the present invention;
FIG. 2 is a schematic illustration of the principle of hyperbranched polyester assisted dispersion of boron nitride into a boron nitride solution;
fig. 3 is a schematic diagram of hyperbranched polyester assisting boron nitride in dispersing and forming a heat conducting network in polyvinyl chloride.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
A thermally conductive polyvinyl chloride comprising: 100 parts by weight of polyvinyl chloride master batch (PVC), 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer, 0.1-5 parts by weight of lubricant, 1-20 parts by weight of hyperbranched polyester (HBP), 0.1-10 parts by weight of boron nitride; the boron nitride is uniformly dispersed in the polyvinyl chloride with the assistance of the hyperbranched polyester to form a heat-conducting network. According to the invention, polyvinyl chloride is used as a main body of the heat-conducting plastic, a plasticizer, a lubricant, a stabilizer and boron nitride are used as modified fillers, the hyperbranched polyester can assist in stripping the boron nitride to obtain a boron nitride nanosheet, and meanwhile, the hyperbranched polyester can be used as the plasticizer, so that the processability of the polyvinyl chloride can be well improved, the stable dispersion of the boron nitride in the polyvinyl chloride can be promoted, and a heat-conducting network is further formed.
In the invention, the polyvinyl chloride master batch is selected from one or more of SG 1-SG 8 type polyvinyl chloride resins. The plasticizer is selected from at least one of dioctyl phthalate (DOP), diisononyl phthalate, triisooctyl phosphite and dibutyl phthalate. The stabilizer is at least one selected from a lead salt composite stabilizer, an OBS organic-based stabilizer, an organotin stabilizer, a liquid composite stabilizer, a calcium-zinc composite stabilizer, a barium-zinc composite stabilizer and a potassium-zinc composite stabilizer. The lubricant is polyethylene wax. The particle size of the boron nitride particles is 0.5-50 μm. The hyperbranched polyester is selected from hyperbranched polyacrylate.
The invention also provides a preparation method of the heat-conducting polyvinyl chloride, which comprises the following steps:
the method comprises the following steps: mixing 1-20 parts by weight of hyperbranched polyester and 0.1-10 parts by weight of boron nitride, dissolving the mixture in an organic solvent to form an initial mixture, treating the initial mixture by using ultrasonic waves for 0.5-72 hours to form stably dispersed oligolamellar boron nitride in the organic solvent, and removing the organic solvent to obtain a first mixture consisting of the hyperbranched polyester and the oligolamellar boron nitride; wherein the organic solvent is at least one of chloroform, tetrahydrofuran, petroleum ether or diethyl ether; the method for removing the organic solvent is selected from one of a blowing method and a rotary evaporation method, for example, the initial mixture after ultrasonic treatment is placed in a blower for magnetic stirring and cold air blowing, and after the blowing is finished, the mixture is placed in a vacuum box for vacuum treatment for 10-240 min, so that the organic solvent in the mixture is completely removed.
Step two: mixing 100 parts by weight of polyvinyl chloride master batch, 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer and 0.1-5 parts by weight of lubricant to form a second mixture;
step three: and mixing and stirring the first mixture and the second mixture to form a third mixture, putting the third mixture into an oven for constant temperature treatment for 3-60 min, setting the temperature of the oven at 40-60 ℃, better and more uniformly dispersing the components in polyvinyl chloride through constant temperature treatment, then putting the third mixture on a double-roll mixing mill for double-roll mixing, controlling the temperature of the double rolls at 140-190 ℃, controlling the speed ratio of front and rear rolls at 1:1.2, controlling the roll spacing between the double rolls at 0.2-0.7 mm, and mixing for 3-10 min. According to the invention, two hollow rollers which are arranged in parallel are used, the relative reversal is carried out at different linear speeds, and the third mixture forms a certain shearing force under the action of a velocity gradient, so that various components in the material can be uniformly dispersed by the shearing force; by controlling the appropriate mixing temperature, the viscous state of the materials is achieved during mixing, mixing uniformity is easier to realize, and the condition that the polyvinyl chloride is degraded when the temperature is too low or too high is also avoided.
Step four: and (3) placing the mixed third mixture in a hot press for hot pressing, wherein the preheating time of the hot pressing is 2-5 min, carrying out half pressing after the preheating is finished, the half pressing time is 2-5 min, wherein the air is discharged for three to five times, then carrying out full pressing, the full pressing time is 2-7 min, the hot pressing temperature is controlled at 140-190 ℃, and finally cooling for 3-5 min to obtain the heat-conducting polyvinyl chloride. By preheating and pressing in a reasonable time, the material is better melted and formed in the die, so that the surface of the molded product is smooth and relatively uniform.
In conclusion, the hyperbranched polyester is added, and the unique spherical multi-branch structure of the hyperbranched polyester is utilized, so that the effect of effectively stripping boron nitride is achieved, and the boron nitride nanosheet which is not easy to agglomerate is obtained; meanwhile, the hyperbranched polyester has good solubility in polyvinyl chloride, and boron nitride nanosheets adsorbed on the hyperbranched polyester can be well mixed with polyvinyl chloride, so that the phenomenon of uneven dispersion cannot occur, and therefore, the stable and even dispersion of boron nitride in polyvinyl chloride is assisted, and the boron nitride nanosheets form a heat conducting network in the polyvinyl chloride, so that the heat conductivity of the polyvinyl chloride is remarkably improved under the condition of reducing the using amount of the boron nitride, and the transparency and the toughness of the heat conducting polyvinyl chloride are also improved. The heat-conducting polyvinyl chloride has the advantages of low cost, high heat conductivity, easy processing, difficult aging, simple forming method, capability of being prepared into various shapes and no pollution, can be applied to wider fields, such as being drawn into a tube to be used as a lampshade of a decorative lamp, can also be used in the aviation field, can insulate, conduct heat and resist oxidation stably.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the present invention, so that any modifications, equivalents, improvements, etc. made to the above embodiment according to the present invention are within the scope of the present invention.
Claims (10)
1. A thermally conductive polyvinyl chloride comprising: 100 parts by weight of polyvinyl chloride master batch, 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer, 0.1-5 parts by weight of lubricant, 1-20 parts by weight of hyperbranched polyester and 0.1-10 parts by weight of boron nitride; the boron nitride is uniformly dispersed in the polyvinyl chloride with the assistance of the hyperbranched polyester to form a heat-conducting network.
2. The heat conductive polyvinyl chloride of claim 1, wherein the polyvinyl chloride masterbatch is selected from one or more of polyvinyl chloride resins of SG 1-SG 8 type.
3. A thermally conductive polyvinyl chloride according to claim 1 wherein said plasticizer is selected from at least one of dioctyl phthalate, diisononyl phthalate, triisooctyl phosphite, and dibutyl phthalate.
4. The thermally conductive polyvinyl chloride according to claim 1, wherein the stabilizer is at least one selected from the group consisting of a lead salt composite stabilizer, an OBS organic-based stabilizer, an organotin-based stabilizer, a liquid composite stabilizer, a calcium zinc composite stabilizer, a barium zinc composite stabilizer, and a potassium zinc composite stabilizer.
5. A thermally conductive polyvinyl chloride as claimed in claim 1 wherein said lubricant is selected from polyethylene wax.
6. A thermally conductive polyvinyl chloride as claimed in claim 1 wherein said boron nitride particles have a particle size of 0.5 to 50 μm.
7. The preparation method of the heat-conducting polyvinyl chloride is characterized by comprising the following steps:
the method comprises the following steps: mixing 1-20 parts by weight of hyperbranched polyester and 0.1-10 parts by weight of boron nitride, dissolving the mixture in an organic solvent to form an initial mixture, treating the initial mixture by using ultrasonic waves to enable the boron nitride to form stably dispersed few-layer boron nitride in the organic solvent, and removing the organic solvent to obtain a first mixture consisting of the hyperbranched polyester and the few-layer boron nitride;
step two: mixing 100 parts by weight of polyvinyl chloride master batch, 5-40 parts by weight of plasticizer, 0.1-5 parts by weight of stabilizer and 0.1-5 parts by weight of lubricant to form a second mixture;
step three: mixing and stirring the first mixture and the second mixture to form a third mixture, and putting the third mixture on a double-roller mixing mill for double-roller mixing, wherein the temperature of the double rollers is controlled to be 140-190 ℃, the speed ratio of the front roller to the rear roller is 1:1.2, the roller distance between the double rollers is 0.2-0.7 mm, and the mixing time is 3-10 min;
step four: and (3) placing the mixed third mixture in a hot press for hot pressing, wherein the preheating time of the hot pressing is 2-5 min, carrying out half pressing after the preheating is finished, the half pressing time is 2-5 min, wherein the air is discharged for three to five times, then carrying out full pressing, the full pressing time is 2-7 min, the hot pressing temperature is controlled at 140-190 ℃, and finally cooling for 3-5 min to obtain the heat-conducting polyvinyl chloride.
8. The method as claimed in claim 7, wherein the organic solvent is at least one selected from chloroform, tetrahydrofuran, petroleum ether and diethyl ether.
9. The method as claimed in claim 7, wherein the organic solvent is removed by a method selected from a purging method and a rotary evaporation method.
10. The method for preparing heat-conducting polyvinyl chloride as claimed in claim 7, wherein in the third step, before mixing, the third mixture is put into an oven for constant temperature treatment for 3-60 min, and the temperature of the oven is set to 40-60 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115044187A (en) * | 2022-06-22 | 2022-09-13 | 广东安拓普聚合物科技有限公司 | Preparation method of oil-soluble polyurethane plugging agent |
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| JP2007211156A (en) * | 2006-02-10 | 2007-08-23 | Teijin Ltd | Resin composition improved in heat-resistance and mechanical property and its preparation method |
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| CN107177130A (en) * | 2017-06-16 | 2017-09-19 | 东莞市联洲知识产权运营管理有限公司 | A kind of preparation method for the high heat conduction polyvinyl chloride composite materials being modified based on boron nitride nanosheet |
| CN109320719A (en) * | 2018-09-28 | 2019-02-12 | 成都新柯力化工科技有限公司 | A kind of heat conductive electronic equipment graphite oxide alkene plastics and preparation method |
| CN109852044A (en) * | 2018-12-06 | 2019-06-07 | 安徽集虹材料科技有限公司 | Thermally conductive nylon of a kind of boron nitride orientation and preparation method thereof |
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| CN107177130A (en) * | 2017-06-16 | 2017-09-19 | 东莞市联洲知识产权运营管理有限公司 | A kind of preparation method for the high heat conduction polyvinyl chloride composite materials being modified based on boron nitride nanosheet |
| CN109320719A (en) * | 2018-09-28 | 2019-02-12 | 成都新柯力化工科技有限公司 | A kind of heat conductive electronic equipment graphite oxide alkene plastics and preparation method |
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| CN115044187A (en) * | 2022-06-22 | 2022-09-13 | 广东安拓普聚合物科技有限公司 | Preparation method of oil-soluble polyurethane plugging agent |
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