CN102061028A - Preparation method of conductive polymer composite with low percolation value - Google Patents
Preparation method of conductive polymer composite with low percolation value Download PDFInfo
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- CN102061028A CN102061028A CN2010105840962A CN201010584096A CN102061028A CN 102061028 A CN102061028 A CN 102061028A CN 2010105840962 A CN2010105840962 A CN 2010105840962A CN 201010584096 A CN201010584096 A CN 201010584096A CN 102061028 A CN102061028 A CN 102061028A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Abstract
The invention discloses a preparation method of a conductive polymer composite with low percolation value. The method comprises the following steps: firstly, mixing polyethylene (PE) with conductive black (CB); secondly, using the mixture of CB and PE and polyethylene terephthalate (PET) at a certain ratio to process through the extrusion-hot stretching-quenching technology; and finally, performing granulation and mould pressing to prepare the conductive microfibrillar polymer composite. In the obtained material disclosed by the invention, the dispersed phase PET is used to form good microfiber and a large amount of CB is selectively distributed on the surface of the PET microfiber. Therefore, the selective distribution of CB ensures that the conductive path is easy to construct and the percolation value is low.
Description
Technical field
The invention belongs to the conductive polymer composite technical field, be to be raw material, prepare a kind of low excess effusion value conductive polymer composite by " extruding-thermal stretch-quenching " technology with graphitized carbon black (hereinafter to be referred as CB), polyethylene (hereinafter to be referred as PE) and polyethylene terephthalate (hereinafter to be referred as PET).
Background technology
Conductive polymer composite is meant with the macromolecular material to be matrix, add the heterogeneous compound system that various conductive filler materials obtain through dispersion, mixing, moulding with conducting function, it has many excellent specific properties of macromolecular material, can be in a big way according to use needs regulate electricity, mechanics and other performance, the cost of material lower, be easy to moulding and mass production, thereby be subjected to people's extensive attention.Conductive polymer composite is often done antistatic and electromagnetic shielding material is widely used in industries such as electronics, electrical equipment, coal mining, weaving.In addition, it has the physical phenomenon of many uniquenesses, as exceedes and ooze phenomenon, and resistivity is to temperature, pressure, gas concentration susceptibility, the current-voltage non-linear behavior, and current noise, electricity and dielectric properties are to the dependency of frequency etc.This makes conductive polymer composite as a kind of functional high molecule material very high actual application value be arranged, and also has very high theoretical investigation to be worth.
The conductive polymer composite preparation method is generally melt blending, be about to conductive filler material and polymeric matrix by banburying, open refining, extrude blend etc. and make.Utilize this method will obtain the material of high conductivity, need to add usually 5 ~ 20 vol% conductive filler material (Hong JI, et al. Appl. Phys. Lett., 2003,82:1956).Yet so high levels of filler can cause relatively poor mechanical property of matrix material and processing fluidity, and higher cost.
For the conductive filler material content that solves conductive polymer composite and the contradiction between its processing characteristics, mechanical property and the cost, at present academia has developed the conduction excess effusion value that some novel methods can reduce conductive polymer composite, comprise that mainly (1) two exceeding ooze (Sumita M, et al. Polym. Bull., 1991,25:265), promptly conducting particles be distributed in according to qualifications co-continuous blend one mutually in.At this moment, conducting particles only needs to reach excess effusion value in this enrichment mutually, and compound system just can conduct electricity.(2) conducting particles mainly be distributed in common external phase blend phase interface (Gubbels F, et al. Macromolecules, 1995,28:1559).Gubbels etc. utilize the selectivity of CB particle to distribute and the migration course between polymer phase, make the CB particle only be distributed in the PE/ polystyrene phase interface of external phase blend altogether, system is conducted electricity excess effusion value reduce.(3) before synthetic polymer, conducting particles joined carry out in the monomer in-situ polymerization (Zhang MQ, et al. Carbon, 2003,41:371).(4) conducting particles is distributed in a kind of polymkeric substance according to qualifications, and this distribution of polymer the fiber surface of fibre reinforced composites (Narkis M, et al. J. Electrostat., 1999,47:201).(5) polymer dispersed is concentrated the end be distributed in fibrous conductive filler material mutually, make the conductive filler material self-assembly form conductive network (Wu GZ, Sumita M, et al. Macromolecules, 2002,35:945).Although these methods can more or less reduce the excess effusion value of matrix material, all there are many deficiencies in they, and being processed the outfield as the matrix material electrical property influences greatly; The mechanical mechanics property of conducing composite material can become very poor because of polymer blend interface is incompatible in method (1) and (2), in addition, the electrical property of matrix material is very responsive to the course of processing in the method (2), and conductive network further is being easy to destroy in the forming process; It is little that method (3) is that situ aggregation method prepares the conducing composite material handiness; The matrix of the conducing composite material of method (4) preparation is a fiber reinforced polymer composites, and forming process is poor, and is bigger to the processing units wearing and tearing, and it is very difficult to make the polymer dispersed that contains conducting particles be distributed in the fortifying fibre surface mutually fully; In the method (5), make the disperse phase Choice of Resin be distributed in the bat wool end, the terminal form of this filler itself is had special requirement, and sample is needed the very long aftertreatment time, increase tooling cost and caused polymer degradation easily.This shows that the shortcoming that above-mentioned each method exists has been offset the advantage that low excess effusion value brings to a great extent.
In the previous work, we are matrix with PE, PET is a disperse phase, CB is a conductive filler material, when the preparation conductive polymer composite, earlier with CB and PET melting mixing, and then CB prepared conduction fibrillation polymer composite with matrix PE by " extruding-thermal stretch-quenching " technology with the mixture of PET.In this conductive polymer composite, CB and PET form the conduction fento, and the excess effusion value of conduction fibrillation polymer composite is 5.0 vol%(Xu XB, Li ZM, et al. Carbon, 2005,43:1479; Li Zhongming, Xu Xiangbin etc., Chinese invention patent, ZL200310110701.2).Because this method is earlier that CB and PET is mixed, the interaction that CB and PET are strong can only be dispersed in the PET fento CB, therefore has only after CB content surpasses the maximum tap density in the PET fento, and the PET fento just can have excellent conducting performance.Make CB move to the fento surface in order to surpass maximum tap density, a large amount of CB is used to fill the PET fento, and these CB that play filling effect are very little to the formation contribution of whole conductive network, and this is hinting the excess effusion value that can further reduce matrix material by the distribution situation of regulation and control CB.
Summary of the invention
The objective of the invention is " to extrude-thermal stretch-quenching " problem of the conduction fibrillation polymer composite existence of technology preparation at existing employing, be that a large amount of CB is used to fill the PET fiber and contribution that conductive network is formed is very little, excess effusion value is bigger, provide a kind of new, can prepare the more conduction fibrillation polymer composite of low excess effusion value.
The conduction fibrillation polymer composite of the present invention's preparation contains three components: conducting particles CB, and disperse phase PET and matrix PE, concrete preparation process is as follows:
(1) must be dry before dry CB and PET use, make the moisture weight content be less than 0.01%;
(2) melt blending is earlier with 70 parts of PE banburyings in Banbury mixer, 180 ℃ of banburying temperature, 5 minutes banburying time, under uniform temp, add 5 ~ 17 parts of CB then, continue banburying 5 minutes, take out back cool to room temperature in air and obtain the CB/PE mixture, again the CB/PE mixture of gained is broken into the particle of diameter 0.2-1.0 millimeter;
(3) extruding the CB/PE mixture particle that will obtain at room temperature mixes with 30 parts of exsiccant PET particles, place the single screw extrusion machine melt blending to extrude on the mixture particle again, the temperature of first three section of extruder barrel and mouthful mould is set at 190 ℃ respectively, 250 ℃, 275 ℃, 270 ℃, screw speed is 60 rev/mins, and material is extruded by slit-shaped mouth mould;
(4) the material bar that will extrude of thermal stretch carries out thermal stretch under normal temperature air, and hot-draw ratio is 2.5, and hot-draw ratio is defined as the ratio of rate of extension and rate of extrusion;
(5) quenching cools off the material bar after thermal stretch by pressure in the cooling trough of 20 ℃ of water temperatures, and the PET fibre shape is fixed up;
(6) granulation with cooled material bar through the dicing machine granulation.
More than the umber of used material be weight part.
The VXC-605 that the used preferred U.S. of CB Cabot company produces in the aforesaid method, the DBP value is 148cm
3/ 100g, following dry 12 hours before using at 120 ℃.
The inventive method be earlier with PE with after CB mixes, again CB/PE mixture and PET are processed by " extruding-thermal stretch-quenching " technology according to a certain ratio, and in extrusion, because of the screw rod shearing effect, fused disperse phase PET is sheared becomes very little drop, be dispersed among the matrix PE, after process slit mouth mould is extruded, disperse phase PET is out of shape under the intensive shearing action, and in follow-up thermal stretch process, form the fento of 1 ~ 5 micron of diameter, by quick cooling fento is preserved.Simultaneously, in this process, the CB that is dispersed in the PE matrix moves to PET because between PET and the CB less interfacial tension make CB tend to be distributed in PET mutually in, but limited mixing time makes a large amount of CB optionally be distributed in PET fento surface in extrusion.After granulation, obtain the finished product of the present invention then---conduction fibrillation polymer composite.This matrix material can be in reprocessing processes such as mold pressing, form conductive network by original position conduction fento mutual overlap joint in matrix resin, this network has constituted the network path of electric transmission, and the selectivity of CB distributes and has overcome the influence of the maximum tap density of PET fento to conductive network effectively, just reduce making the required filling adding amount of material conduction on the macroscopic view, promptly reduced system conduction excess effusion value.In addition, the minimizing of CB add-on, the processibility of material itself can improve, and the moulding expense also can obtain to reduce.
The present invention has the following advantages
1, because method of the present invention has changed the order by merging of material in the prior art, being about to CB mixes with PET earlier, and then melt extrude-thermal stretch-quenching with PE, become CB is mixed with PE earlier, and then extrude-thermal stretch-quenching with PET, make not only that the PET as disperse phase has formed good fento in the prepared conduction fibrillation polymer composite, but also make CB in the course of processing, successfully move to PET fento surface from the PE matrix, thereby overcome the influence that maximum tap density of the prior art forms conductive network, reduced excess effusion value, and the CB selectivity is distributed in the technology controlling and process that PET fento surface does not need complexity.
But 2, because the morphological structure of the conduction fibrillation polymer composite of the inventive method preparation and parameter regulation and control such as conductivity through port mould size, CB content.
3, the raw material suitability is big, and a lot of incompatible two-phase polymer co-mixing systems can both be used for the conduction fibrillation polymer composite that this method moulding conducting particles selectivity is distributed in the fento surface.
4, method technology of the present invention is simple, is easy to control, and production efficiency height, employed equipment are general conventional polymer processing units, and reduced investment can be continuously produced, and is easy to apply.
Description of drawings
Fig. 1 is the electron scanning micrograph that tape is parallel to draw direction of extruding of the embodiment of the invention 4.
Fig. 2 is the high multiple electron scanning micrograph that tape is parallel to draw direction of extruding of the embodiment of the invention 4.
Fig. 3 is the high multiple electron scanning micrograph of the embodiment of the invention 4 perpendicular to draw direction fento section.
Fig. 4 processes through mold pressing for the conduction fibrillation polymer composite of the embodiment of the invention 4, and the molten electron scanning micrograph that removes the matrix material that forms conduction fento network of gained behind the matrix component of top layer.
Fig. 5 processes through mold pressing for the conduction fibrillation polymer composite of the embodiment of the invention 7, and the molten electron scanning micrograph that removes the matrix material that forms conduction fento network of gained behind the matrix component of top layer.
Fig. 6 processes through mold pressing for the conduction fibrillation polymer composite of the embodiment of the invention 2, and the molten electron scanning micrograph that removes the matrix material that forms conduction fento network of gained behind the matrix component of top layer.
Embodiment
Embodiment given below is to specific descriptions of the present invention; be necessary to be pointed out that at this following examples only are used for that the present invention is further illustrated; can not be interpreted as limiting the scope of the invention, this art skilled person still belongs to protection scope of the present invention according to the invention described above content to nonessential improvement and the adjustment that the present invention makes.
(1) dry CB and PET make the moisture weight content be less than 0.01% 120 ℃ of dryings 12 hours;
(2) melt blending is earlier with 70 parts of PE banburyings in Banbury mixer, 180 ℃ of banburying temperature, 5 minutes banburying time, under uniform temp, add 5 ~ 17 parts of CB then, continue banburying 5 minutes, take out back cool to room temperature in air and obtain the CB/PE mixture, again the CB/PE mixture of gained is broken into the particle of diameter 0.2-1 millimeter;
(3) extruding the CB/PE mixture particle that will obtain at room temperature mixes with 30 parts of exsiccant PET particles, place the single screw extrusion machine melt blending to extrude on the mixture particle again, the temperature of first three section of extruder barrel and mouthful mould is set at 190 ℃ respectively, 250 ℃, 275 ℃, 270 ℃, screw speed is 60 rev/mins, and material is extruded by slit-shaped mouth mould;
(4) the material bar that will extrude of thermal stretch carries out thermal stretch under normal temperature air, and hot-draw ratio is 2.5, and hot-draw ratio is defined as the ratio of rate of extension and rate of extrusion;
(5) quenching cools off the material bar after thermal stretch by pressure in the cooling trough of 20 ℃ of water temperatures, and the PET fibre shape is fixed up;
(6) granulation with cooled material bar through the dicing machine granulation.
The material proportion of above comparative example sees Table 1
Comparative example 1 ~ 5
(1) earlier with PE banburying 5 minutes in Banbury mixer, add CB then under uniform temp, banburying 5 minutes is broken into the CB/PE mixture of gained on the particle of diameter 0.2-1 millimeter;
(2) with the CB/PE mixture of gained single screw extrusion machine in melt blending extrude, blend is extruded by slit-shaped mouth mould;
(3) with cooled material bar through the dicing machine granulation.
The material proportion of above comparative example sees Table 1
Volume specific resistance and excess effusion value for the conduction fibrillation polymer composite of investigating the present invention preparation, the matrix material of gained is placed press, be pressed into sheet material by the die press technology for forming condition, and be cut into test sample, be of a size of 2 * 10 * 100(mm) and carry out electric performance test.Volume resistance is greater than 10
8Ω, with the test of ZC36 type high resistant instrument, volume resistance is less than 10
8Ω, with the test of DT-9205B type numerical value formula volt ohm-milliammeter, detailed numerical value sees Table 1.
As can be seen from Table 1, when CB content was all 10 parts, the conduction fibrillation polymer composite volume specific resistance of the present invention's preparation was 3.68 * 10
5Ω cm, and common conducing composite material is up to 2.98 * 10
16Ω cm.The electrical property of the conduction fibrillation polymer composite of the present invention's preparation has increased significantly than common PE/CB matrix material, the common matrix material excess effusion value of PE/CB is 8.5 vol%, and the conduction fibrillation polymer composite excess effusion value of the present invention's preparation only is 3.8 vol%, than in the previous work CB being mixed with PET earlier, and then melt extrude with PE-matrix material excess effusion value (5.0 vol%) that thermal stretch-quenching technology prepares also reduces significantly.
Morphologic observation: the sample that is used for morphologic observation is divided into two kinds, a kind of is that batten is placed the liquid nitrogen deep cooling brittle failure section that brittle failure makes after 0.5～1 hour, another kind is that conduction fibrillation polymer composite is after mold pressing processing, etch away material shape figure behind the PE matrix with dimethylbenzene, the acceleration voltage that observation post uses is 20KV, the results are shown in accompanying drawing 1～6.Accompanying drawing 1 is parallel to the draw direction section of quenching for the tape of extruding of embodiment 4, and can find out to have formed a large amount of PET fentos along draw direction in the tape; Accompanying drawing 2 is the high multiple electron scanning micrograph that tape is parallel to draw direction of extruding of the embodiment of the invention 4, and the CB particle has successfully been moved to PET fento surface from the PE matrix as can be seen; Accompanying drawing 3 be embodiment 4 perpendicular to draw direction fento fracture morphology figure, a large amount of as can be seen CB selectivity is distributed in PET fento surface, and the inner not CB of PET fento; Accompanying drawing 4 is processed through mold pressing for the conduction fibrillation polymer composite of the embodiment of the invention 4, and the molten electron scanning micrograph that removes material behind the PE of top layer, PET in this material has formed the PET fento of 1 ~ 5 micron of diameter as disperse phase as can be seen, and a large amount of CB particles is coated on PET fento surface; Accompanying drawing 5 and accompanying drawing 6 are respectively the conduction fibrillation polymer composite of embodiment 7 and embodiment 2 and process through mold pressing, and moltenly remove this scanning of materials electron micrograph behind the PE of top layer, material has all formed good PET fento under higher and lower CB content as can be seen, and overlap mutually between the fento and formed three-dimensional network, this network structure makes conductive path form easily.
Table 1
| Embodiment | The PE(umber) | The PET(umber) | The CB(umber) | Resistivity (Ω cm) |
| 1 | 70 | 30 | 5.0 | 5.61×10 16 |
| 2 | 70 | 30 | 7.0 | 5.24×10 15 |
| 3 | 70 | 30 | 8.5 | 1.02×10 8 |
| 4 | 70 | 30 | 10.0 | 3.68×10 5 |
| 5 | 70 | 30 | 12.0 | 1.18×10 3 |
| 6 | 70 | 30 | 15.0 | 177 |
| 7 | 70 | 30 | 17.0 | 84.6 |
| Comparative example 1 | 100 | ? | 10.0 | 2.98×10 16 |
| Comparative example 2 | 100 | ? | 16.6 | 5.4×10 15 |
| Comparative example 3 | 100 | ? | 20 | 5.13×10 5 |
| Comparative example 4 | 100 | ? | 22.2 | 534 |
| Comparative example 5 | 100 | ? | 30 | 75.9 |
Annotate: PE, PET and CB are weight part.
Claims (5)
1. the invention provides a kind of preparation method of low excess effusion value conductive polymer composite, it is characterized in that preparing the conduction fibrillation polymer composite of graphitized carbon black content 5 ~ 17 weight parts, disperse phase polyethylene terephthalate content 30 weight parts and matrix polymerized ethylene content 70 weight parts by following processing step and condition:
(1) dry graphitized carbon black and polyethylene terephthalate are dry before use, make the moisture weight content be less than 0.01%;
(2) melt blending is earlier with 70 parts of polyethylene banburyings in Banbury mixer, 180 ℃ of banburying temperature, 5 minutes banburying time, under uniform temp, add 5 ~ 17 parts of graphitized carbon blacks then, continue banburying 5 minutes, take out back cool to room temperature in air and obtain graphitized carbon black/polyethylene mixture, again graphitized carbon black/the polyethylene mixture of gained is broken into the particle of diameter 0.2-1.0 millimeter;
(3) extruding the graphitized carbon black/polyethylene mixture particle that will obtain at room temperature mixes with 30 parts of exsiccant polyethylene terephthalate particles, place the single screw extrusion machine melt blending to extrude on the mixture particle again, the temperature of first three section of extruder barrel and mouthful mould is set at 190 ℃ respectively, 250 ℃, 275 ℃, 270 ℃, screw speed is 60 rev/mins, and material is extruded by slit-shaped mouth mould;
(4) the material bar that will extrude of thermal stretch carries out thermal stretch under normal temperature air, and hot-draw ratio is 2.5, and hot-draw ratio is defined as the ratio of rate of extension and rate of extrusion;
(5) quenching cools off the material bar after thermal stretch by pressure in the cooling trough of 20 ℃ of water temperatures, and the pet fiber form is fixed up;
(6) granulation with cooled material bar through the dicing machine granulation.
2. conduction fibrillation polymer composite preparation method according to claim 1 is characterized in that the disperse phase polyethylene terephthalate has formed the fento of 1 ~ 5 micron of diameter.
3. conduction fibrillation polymer composite preparation method according to claim 1 is characterized in that the graphitized carbon black selectivity is distributed in polyethylene terephthalate fento surface.
4. conduction fibrillation polymer composite preparation method according to claim 1 is characterized in that the electrical property of this matrix material can be regulated by CB content.
5. conduction fibrillation polymer composite preparation method according to claim 1 is characterized in that the excess effusion value of this material is low to moderate 3.8 vol%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103255502A (en) * | 2013-05-23 | 2013-08-21 | 中原工学院 | Preparation method of light-colored compound conductive fiber containing nano ATO (Arsenic Trioxide) |
| CN104842568A (en) * | 2015-04-20 | 2015-08-19 | 中国科学院长春应用化学研究所 | Preparation method of conductive polymeric material |
| CN105220259A (en) * | 2015-10-16 | 2016-01-06 | 同济大学 | A kind of polymer nanocomposite conductive fiber and preparation method thereof |
| CN111057301A (en) * | 2019-12-30 | 2020-04-24 | 贵州省材料产业技术研究院 | Conductive elastomer and preparation method thereof |
| CN117551317A (en) * | 2024-01-09 | 2024-02-13 | 四川大学 | Low-Curie point positive temperature coefficient polymer composite material and preparation method and application thereof |
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