CN107236232A - A kind of polyvinylidene fluoride resin polymer and preparation method thereof - Google Patents
A kind of polyvinylidene fluoride resin polymer and preparation method thereof Download PDFInfo
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- CN107236232A CN107236232A CN201710609742.8A CN201710609742A CN107236232A CN 107236232 A CN107236232 A CN 107236232A CN 201710609742 A CN201710609742 A CN 201710609742A CN 107236232 A CN107236232 A CN 107236232A
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- 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
- C08L27/12—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 fluorine atoms
- C08L27/16—Homopolymers or copolymers or vinylidene fluoride
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- 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
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Abstract
The invention discloses a kind of polyvinylidene fluoride resin polymer, composition is by weight：90~100 parts of polyvinylidene fluoride resin, 0.1~1 part of methyl methacrylate, 1~5 part of perfluoroalkyl polyurethane, composite nucleating agent 0.3~10.8, composite nucleating agent are the composite nucleating agent that at least one of sodium metasilicate material, magnesium oxysulfide whisker, potassium titanate crystal whisker are compounded with mica powder.Invention enhances the heat resistance of polyvinylidene fluoride resin polymer, accelerate its extrusion when the speed that crystallizes, reduce shrinkage factor, greatly improve crystallinity, improve ratio of briquetting, in addition by the resinous polymer when injection molding manufactures finished product, the shaping fraction defective reduction of finished product, production efficiency increase, the vicat softening temperature of resin particle of the present invention has been at least up to 135 DEG C, and impact resistance has been at least up to 240Kj/m2。
Description
Technical field
The present invention relates to field of resin modification, more particularly to a kind of polyvinylidene fluoride resin polymer and preparation method thereof.
Background technology
Polyvinylidene fluoride resin (PVDF) has the characteristic of fluororesin and resins for universal use concurrently, except with good resistant to chemical etching
It is also special with piezoelectricity, dielectricity, pyroelectricity etc. outside property, heat-resisting quantity, oxidative resistance, weatherability, the radiance of resistance to ray
Performance, its continuous maximum operation (service) temperature reaches 125 DEG C, melt-processable, available for production anticorrosion container etc..Kynoar tree
The secondary workabilities such as machining, bending machining, welding processing after its time processing of fat are excellent.
However, the monomer such as vinylidene introduces macromolecular chain, destroyed when forming polyvinylidene fluoride resin copolymer
Regularity, reduces crystallinity, and melt viscosity is higher, and ready-made article warpage and contraction are easily gone out in injection moulding and extrusion molding
Etc. phenomenon.The melt viscosity of Kynoar is relevant with processing temperature and shear rate, and processing temperature is higher, shear rate is higher
Mobility is better, and ratio of briquetting is higher, but when processing temperature is too high or heated time is oversize, product color can turn yellow, light
Degree reduction, in addition, processing temperature is high, crystallization time is long, crystallinity height can form big spherocrystal, and make product be also easy to produce pin hole,
The phenomenons such as depression, causing the qualification rate of formed body reduces.
In existing formula, the addition of inorganic filler, addition of high molecular polymer etc. are improved poly- inclined to a certain extent
The crystallinity of fluoroethylene resin, reduces molding shrinkage, but can not still bear higher processing temperature, therefore production cost
Increase, production efficiency reduction.
The content of the invention
In view of the above-mentioned problems, the invention provides a kind of polyvinylidene fluoride resin polymer, the polyvinylidene fluoride resin gathers
Compound has higher heat resistance and relatively low shrinkage factor and melt viscosity, also with higher adhesion strength, impact strength, from
And resin is improved when preparing finished product, easily there is the problems such as warpage and contraction in finished product.
The polyvinylidene fluoride resin polymer that the present invention is provided, its composition is as follows by weight：
90~100 parts of polyvinylidene fluoride resin
0.1~1 part of methyl methacrylate
1~5 part of perfluoroalkyl polyurethane
Composite nucleating agent 0.3~10.8
Wherein, described composite nucleating agent is at least one of sodium metasilicate material, magnesium oxysulfide whisker, potassium titanate crystal whisker and mica
The composite nucleating agent of powder compounding.
It is preferred that, composite nucleating agent is by 0.1~10 part of mica powder, 0.1~0.3 part of sodium metasilicate material and 0.1~0.5 part of sulphur
Oxygen magnesium whisker compounding composition.
It is preferred that, composition of the invention is as follows by weight：
95 parts of polyvinylidene fluoride resin
1 part of methyl methacrylate
3 parts of perfluoroalkyl polyurethane
0.2 part of sodium metasilicate material
5 parts of mica powder
It is preferred that, composition of the invention is as follows by weight：
100 parts of polyvinylidene fluoride resin
0.5 part of methyl methacrylate
5 parts of perfluoroalkyl polyurethane
0.2 part of sodium metasilicate material
5 parts of mica powder
Magnesium oxysulfide whisker 0.5
It is preferred that, a diameter of 0.5 μm~1 μm of magnesium oxysulfide whisker or potassium titanate crystal whisker, length is 20 μm~40 μm.
It is preferred that, present invention additionally comprises 0.5~1 part of silane coupler.
The preparation method of the polyvinylidene fluoride resin polymer of the present invention, comprises the following steps：
(1) mix：Raw material is weighed in proportion and is sequentially added in mixer；
(2) stir：Raw material is heated and stirred, raw material is well mixed；
(3) extruding pelletization：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out；
E. enter through Step d melting extrusion mixture in forming machine and be molded；
F. formed body cooling obtains the polyvinylidene fluoride resin polymer.
8th, the preparation method of polyvinylidene fluoride resin polymer as claimed in claim 7, it is characterised in that the step
(1) raw material addition sequence is in：Composite nucleating agent is first added, polyvinylidene fluoride resin stirring is added, is eventually adding methyl-prop
E pioic acid methyl ester, perfluoroalkyl polyurethane, stir simultaneously.
It is preferred that, heating-up temperature when stirring in step (2) is 100~110 DEG C, mixing time is 20~30min；Step
(3) screw speed is that 30~40r/min, compression section screw compression ratio are 1~2.5 during screw extruding in:1.
It is preferred that, preheating section temperature is in step (3)：190~200 DEG C, plasticization temperature be：200~210 DEG C, extrusion temperature
Spend and be：210~220 DEG C, forming temperature be：220~230 DEG C.
In the present invention, the manufacture method of polyvinylidene fluoride resin polymer is comprised the steps of：
(1) mix：Prepare raw material by formulation weight part proportioning, raw material is sequentially added in mixer, addition sequence is first
Add mica powder stirring and add polyvinylidene fluoride resin stirring, add methyl methacrylate, perfluoroalkyl polyurethane, most
Addition sodium metasilicate material stirring afterwards；
(2) stir：Raw material is heated to certain temperature stirring a period of time, is well mixed raw material, heating-up temperature is 100
~110 DEG C, mixing time is 20~30min；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 30~40r/min, screw compression ratio
For 1~2.5:1, preheating temperature is 190~200 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is：200~210 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is：210~220 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：220~230 DEG C；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
The polyvinylidene fluoride resin polymer obtained according to the present invention, heat resistance, melt viscosity, adhesion strength and shock resistance
Intensity is improved, by the addition of composite nucleating agent, enhance polyvinylidene fluoride resin polymer heat resistance,
The speed crystallized during its extrusion is accelerated simultaneously, shrinkage factor is reduced, greatly improves crystallinity, ratio of briquetting is improved, in addition by this
Resinous polymer is when injection molding manufactures finished product, the shaping fraction defective reduction of finished product, production efficiency increase.
The vicat softening temperature of the resin particle of the present invention has been at least up to 135 DEG C, and impact resistance is at least up to
245Kj/m2。
Embodiment
Embodiment 1
(1) mix：Polyvinylidene fluoride resin：90 parts, sodium metasilicate material：0.1 part, mica powder：2 parts, methyl methacrylate：
0.1 part, perfluoroalkyl polyurethane：1 part, raw material is added in the following order, mica powder, the silicic acid first added in composite nucleating agent
Sodium material is stirred, and is added polyvinylidene fluoride resin stirring, is eventually adding methyl methacrylate, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 100 DEG C, 20min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 30r/min, and screw compression ratio is 1：
1, preheating temperature is 190 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 200 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 210 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：220℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 2
(1) mix：Polyvinylidene fluoride resin：93 parts, sodium metasilicate material：0.1 part, mica powder：0.1 part, methyl methacrylate
Ester：0.1 part, perfluoroalkyl polyurethane：1 part, magnesium oxysulfide whisker：0.1 part, raw material is added in the following order, first added compound
Mica powder, sodium metasilicate material, magnesium oxysulfide whisker in nucleator are stirred, and are added polyvinylidene fluoride resin stirring, are finally added
Enter methyl methacrylate, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 100 DEG C, 20min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 30r/min, and screw compression ratio is 1：
1, preheating temperature is 190 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 200 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 210 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：220℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 3
(1) mix：Polyvinylidene fluoride resin：95 parts, mica powder：8 parts, methyl methacrylate：0.3 part, perfluoroalkyl
Polyurethane：2 parts, magnesium oxysulfide whisker：0.2 part, raw material is added in the following order, first add composite nucleating agent in mica powder,
Magnesium oxysulfide whisker is stirred, and is added polyvinylidene fluoride resin stirring, is eventually adding methyl methacrylate, perfluoroalkyl poly
Urethane；
(2) stir：Raw material is heated to 100 DEG C, 25min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 35r/min, and screw compression ratio is 2：
1, preheating temperature is 200 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 210 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 220 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：225℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 4
(1) mix：Polyvinylidene fluoride resin：95 parts, sodium metasilicate material：0.2 part, mica powder：7 parts, methyl methacrylate：
0.5 part, perfluoroalkyl polyurethane：3 parts, magnesium oxysulfide：0.2 part, raw material is added in the following order, first added in composite nucleating agent
Mica powder, sodium metasilicate material, magnesium oxysulfide whisker be stirred, add polyvinylidene fluoride resin stirring, be eventually adding methyl-prop
E pioic acid methyl ester, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 105 DEG C, 25min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 35r/min, and screw compression ratio is
1.5：1, preheating temperature is 195 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 205 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 215 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：225℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 5
(1) mix：Polyvinylidene fluoride resin：97 parts, sodium metasilicate material：0.2 part, mica powder：3 parts, methyl methacrylate：
0.2 part, perfluoroalkyl polyurethane：2 parts, magnesium oxysulfide whisker：0.1 part, raw material is added in the following order, first add compound nucleation
Mica powder, sodium metasilicate material, magnesium oxysulfide whisker in agent are stirred, and are added polyvinylidene fluoride resin stirring, are eventually adding first
Base methyl acrylate, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 100 DEG C, 20min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 30r/min, and screw compression ratio is 1：
1, preheating temperature is 190 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 200 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 210 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：220℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 6
(1) mix：Polyvinylidene fluoride resin：92 parts, sodium metasilicate material：0.2 part, mica powder：10 parts, methyl methacrylate
Ester：0.5 part, perfluoroalkyl polyurethane：5 parts, magnesium oxysulfide whisker：0.3 part, raw material is added in the following order, first added compound
Mica powder, sodium metasilicate material, magnesium oxysulfide whisker in nucleator are stirred, and are added polyvinylidene fluoride resin stirring, are finally added
Enter methyl methacrylate, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 110 DEG C, 30min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 30r/min, and screw compression ratio is
2.5：1, preheating temperature is 200 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 210 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 220 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：230℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 7
(1) mix：Polyvinylidene fluoride resin：95 parts, sodium metasilicate material：0.3 part, mica powder：5 parts, methyl methacrylate：
0.8 part, perfluoroalkyl polyurethane：1 part, magnesium oxysulfide：0.3 part, raw material is added in the following order, first added in composite nucleating agent
Mica powder, sodium metasilicate material, magnesium oxysulfide whisker be stirred, add polyvinylidene fluoride resin stirring, be eventually adding methyl-prop
E pioic acid methyl ester, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 110 DEG C, 30min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 40r/min, and screw compression ratio is
2.5：1, preheating temperature is 200 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 210 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 220 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：230℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 8
(1) mix：Polyvinylidene fluoride resin：97 parts, sodium metasilicate material：0.3 part, mica powder：3 parts, methyl methacrylate：
0.6 part, perfluoroalkyl polyurethane：4 parts, magnesium oxysulfide：0.2 part, raw material is added in the following order, first added in composite nucleating agent
Mica powder, sodium metasilicate material, magnesium oxysulfide whisker be stirred, add polyvinylidene fluoride resin stirring, be eventually adding methyl-prop
E pioic acid methyl ester, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 110 DEG C, 30min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 40r/min, and screw compression ratio is
2.5：1, preheating temperature is 200 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 210 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 220 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：230℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Embodiment 9
(1) mix：Polyvinylidene fluoride resin：100 parts, sodium metasilicate material：0.3 part, mica powder：6 parts, methyl methacrylate
Ester：1 part, perfluoroalkyl polyurethane：3 parts, magnesium oxysulfide：0.5 part, raw material is added in the following order, composite nucleating agent is first added
In mica powder, sodium metasilicate material, magnesium oxysulfide whisker be stirred, add polyvinylidene fluoride resin stirring, be eventually adding methyl
Methyl acrylate, perfluoroalkyl polyurethane；
(2) stir：Raw material is heated to 100 DEG C, 30min is stirred, raw material is well mixed；
(3) extrusion molding：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section, and screw speed is 30r/min, and screw compression ratio is 2：
1, preheating temperature is 200 DEG C；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify, and plasticization temperature is 210 DEG C；
D. the mixture for plastifying completion enters metering section through screw extruding, is melted and squeezes by quantitative supply cross-head
Go out, extrusion temperature is 220 DEG C；
E. enter through Step d melting extrusion mixture in forming machine and be molded, forming temperature is：230℃；
F. formed body cooling obtains polyvinylidene fluoride resin polymer.
Comparative example 1
Extruding pelletization is individually carried out as a comparison case using polyvinylidene fluoride resin, extrusion condition is same as Example 1.
Embodiment 1 to 9 and comparative example 1 are tested by following test method：
1. impact resistance：The impact resistance of polyvinylidene fluoride polymer resin is determined using pendulum impact test method, according to
ISO179 standard tests.The particulate resins that above-mentioned steps are obtained are made lath sample and then tested.
2. vicat softening temperature：Using thermal deformation dimension card temperature analyzer, according to ISO306 standard tests.
Test result is as follows：
The present invention, by the addition of sodium metasilicate powder, can strengthen adhesion strength, heat resistance gathers polyvinylidene fluoride resin
Compound can bear higher processing temperature in molding process, by the addition of composite nucleating agent, add polyvinylidene fluoride
The heat resistance of olefine resin polymer, while composite nucleating agent accelerate polyvinylidene fluoride resin polymer extrusion when
Crystallization rate, reduces shrinkage factor, is conducive to follow-up processing.And from the point of view of the test result of above-described embodiment, it is soft that it ties up card
Change temperature and be at least up to 135 DEG C, impact resistance has been at least up to 245Kj/m2, and the resin particle of comparative example 1 is through identical
Method of testing is tested, and its vicat softening temperature is 110 DEG C, and impact resistance is 200Kj/m2.In addition, the polyvinylidene fluoride in comparative example
Olefine resin is in Screw Extrusion granulation process, and preheating section temperature is 180~190 DEG C, plasticization temperature is：190~200 DEG C, extrusion
Temperature is：Preferably, when screw speed is 50~60r/min, extruder extrusion capacity reaches extrusion molding rate at 200~210 DEG C
Limit, and the present invention only need to can reach the extrusion upper limit when screw speed is in 30~40r/min.In addition, the present invention is improving resistance to
Hot, melt viscosity, adhesion strength and impact strength, to be conducive to while following process, the performance of other each side is equal
Keep stable, the phenomenon that finished product warpage occurs and shunk is effectively improved, shrinkage factor is less than 1.5%.
Claims (10)
1. a kind of polyvinylidene fluoride resin polymer, it is characterised in that its composition is as follows by weight：
90~100 parts of polyvinylidene fluoride resin
0.1~1 part of methyl methacrylate
1~5 part of perfluoroalkyl polyurethane
Composite nucleating agent 0.3~10.8
Wherein, described composite nucleating agent is that at least one of sodium metasilicate material, magnesium oxysulfide whisker, potassium titanate crystal whisker and mica powder are multiple
The composite nucleating agent matched somebody with somebody.
2. polyvinylidene fluoride resin polymer as claimed in claim 1, it is characterised in that described composite nucleating agent is by 0.1
~10 parts of mica powders, 0.1~0.3 part of sodium metasilicate material and 0.1~0.5 part of magnesium oxysulfide whisker compounding composition.
3. polyvinylidene fluoride resin polymer as claimed in claim 1, it is characterised in that its composition is as follows by weight：
95 parts of polyvinylidene fluoride resin
1 part of methyl methacrylate
3 parts of perfluoroalkyl polyurethane
0.2 part of sodium metasilicate material
5 parts of mica powder.
4. polyvinylidene fluoride resin polymer as claimed in claim 1, it is characterised in that its composition is as follows by weight：
100 parts of polyvinylidene fluoride resin
0.5 part of methyl methacrylate
5 parts of perfluoroalkyl polyurethane
0.2 part of sodium metasilicate material
5 parts of mica powder
Magnesium oxysulfide whisker 0.5.
5. polyvinylidene fluoride resin polymer as claimed in claim 1, it is characterised in that described magnesium oxysulfide whisker or metatitanic acid
A diameter of 0.5 μm~1 μm of potassium whisker, length is 20 μm~40 μm.
6. polyvinylidene fluoride resin polymer as claimed in claim 1, it is characterised in that silane coupled including 0.5~1 part
Agent.
7. a kind of preparation method of polyvinylidene fluoride resin polymer as claimed in claim 1, it is characterised in that including following
Step：
(1) mix：Raw material is weighed in proportion and is sequentially added in mixer；
(2) stir：Raw material is heated and stirred, raw material is well mixed；
(3) extruding pelletization：
A. mixture step (2) obtained is placed in the drawing-in device of screw extruder；
B. mixture is preheated through screw extruding into transportation section；
C. the mixture by preheating enters compression section through screw extruding and completes to plastify；
D. the mixture for plastifying completion enters metering section through screw extruding, by quantitative supply cross-head melting extrusion；
E. enter through Step d melting extrusion mixture in forming machine and be molded；
F. formed body cooling obtains the polyvinylidene fluoride resin polymer.
8. the preparation method of the polyvinylidene fluoride resin polymer as described in any one of claim 1 to 7, it is characterised in that institute
Stating raw material addition sequence in step (1) is：The component first added in composite nucleating agent is stirred, and adds Kynoar tree
Fat stir, be eventually adding methyl methacrylate, perfluoroalkyl polyurethane, stir simultaneously.
9. the preparation method of polyvinylidene fluoride resin polymer as claimed in claim 8, it is characterised in that the step (2)
Heating-up temperature during middle stirring is 100~110 DEG C, mixing time is 20~30min；Spiral shell during screw extruding in the step (3)
Bar rotating speed is that 30~40r/min, compression section screw compression ratio are 1~2.5:1.
10. the preparation method of polyvinylidene fluoride resin polymer as claimed in claim 8, it is characterised in that the step (3)
Middle preheating section temperature is：190~200 DEG C, plasticization temperature be：200~210 DEG C, extrusion temperature be：210~220 DEG C, shaping temperature
Spend and be：220~230 DEG C.
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