CN108948644A - A kind of automobile parts thermoplastic elastomer (TPE) and preparation method thereof - Google Patents
A kind of automobile parts thermoplastic elastomer (TPE) and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of automobile parts thermoplastic elastomer (TPE)s and preparation method thereof, belong to technical field of polymer materials.Thermoplastic elastomer (TPE) of the invention includes the component of following parts by weight: 32-46 parts of styrenic elastomer, 35-43 parts of polyformaldehyde, 33-43 parts of fire retardant A, 9-14 parts of fire retardant B, 13-18 parts of modified cellulose fibre, 3-6 parts of oil-proof composition, 6-9 parts of softening agent, the thermoplastic elastomer (TPE) is made through gamma-ray irradiation is modified.Thermoplastic elastomer (TPE) produced by the present invention has the characteristics that intensity is high, tear-resistant, flame retardant property is good.
Description
Technical field
The invention belongs to technical field of polymer materials, it is related to a kind of automobile parts thermoplastic elastomer (TPE) and its preparation side
Method.
Background technique
Thermoplastic elastomer (TPE), abbreviation TPE had not only had the dissolubility and different thermoplastic of polystyrene foam plate, but also have had suitable fourth
The flexibility and resilience of rubber are the advantageous combination of plastics and rubber advantage, big surface friction coefficient, cryogenic property
Well, excellent electrical properties, processing performance are good.Thermoplastic elastomer (TPE) has the characteristics that save resource, the energy and high production efficiency, and adds
Work waste material can recycle, and be conducive to environmental protection.Auto parts and components can not only reduce weight using TPE material, improve
Components performance improves vehicle recovery utilization rate, can also improve appearance, therefore, from the 1990s, TPE is in foreign countries
The application amount of automobile increases quickly, and automobile TPE mainly has TPO, TPV, TPC, TPU and TPS.TPO is the poly- of physics mix type
Olefin hydrocarbons thermoplasticity elastic body, by polyolefin (common polypropylene) and polyolefin elastomer (ternary that is unvulcanized or slightly vulcanizing
EP rubbers) machinery blends or (complete) vulcanization of dynamic part blends, resistance to polar fluid function admirable, but resistance to non-polar hydrocarbon
Poor with halohydrocarbon fluid property, property retention is poor at high temperature.TPO is used primarily in bumper, interior trim skin material, door
Window sealing strip, fender, steering box sheath, fuel pipe etc..It is anti-that TPV is used primarily in the safety fastener of high-end vehicles, angle-style
Rush shelves, wind file, air entrapment piece and various air-supplies, water delivery hose, door and window water-proof sealing strip, oil sealing, gasket, automobile door and window sealing
Item etc..TPV material has the characteristics that coloring and regeneration are convenient.The TPV wear resistance of high molecular weight is good, coefficient of friction is small, can
As the extrusion materials of automotive glass guide groove sealing strip, also can be used as Rubber Seal Strip for Automobile connects angle section material without flash.TPC
Be usually used in the high occasion of heat-resisting, oil resistant, requirement of mechanical strength, as air induction hose, knuckle dust cover, air bag, sealing ring,
Gear teeth band, oil pipe, harness pieces, car headlamp, automobile door lock, satellite antenna clip, door handle sealing ring etc..TPU
Have the characteristics that high intensity, high abrasion, high resiliency, ageing-resistant, oil resistant, in auto parts and components using very extensive, is such as used for
Gear shift pull rod handle, the axle sleeve of various shaft couplings and washer, the connector of various harness, spiral expanding electric wire, cable cover(ing), tooth
Shape band, the sheath of steering linkage and gasket, suspension joint hinge, hydropneumatic, suspension diaphragm, damping diaphragm, damper, spring
It limits fast etc..TPS is earliest TPE material, cheap, has good tensile strength and elasticity, rub resistance and fatigue durability
Can be good, but heat resistance is poor, the performances such as tensile property, weatherability, oil resistivity, wearability can not be also saturated with rubber phase ratio
Hydrogenation type TPS --- SEBS, SEPS heat resistance increases and has preferable milk ozone, resistance to oxidation, UV resistant and family
Outer weather resistance is mainly used for sealing strip, shift handle handball, brake handle, ornamental strip etc..But TPS material includes at present
Comprehensive performance including the performances such as tearing-resistant performance, wearability, anti-flammability, durability is poor, so that it is on automobile parts
Using being greatly limited,
As Chinese patent application 201610490953.X discloses a kind of hydrogenated styrene-b- phenylethylene/butadiene-
B- styrol copolymer, has the following structure:Wherein, n
It is 42~78；X is 85~156；Y is 292~367；Z is 125~244；The elastomeric article surface is smooth, elastic moderate, rubber
Glue sense is full, and adhesive strength is big between layers, and product comprehensive mechanical property is excellent, can be applied to the fields such as automotive upholstery,
But its fire retardant, tearing-resistant performance are poor, reduce service life.Chinese patent application CN201410829392.2 is disclosed
A kind of electric car charging cable non-halogen flame-retardant cable and preparation method thereof, which includes elastomer resin, fire-retardant
Agent and fire retarding synergist, wherein elastomer resin is thermoplastic polyurethane elastomer, and fire retardant is melamine cyanurate and three
The phosphatic blend of poly cyanamid, fire retarding synergist are hypophosphites, and specifically, which includes: elastomer resin 95-
100 parts, 10-40 parts of fire retardant, 0.5-3 parts of fire retarding synergist, 5-20 parts of plasticizer, 0.5-3 parts of composite antioxidant, anti ultraviolet agent
0.5-3 parts, 0.5-3 parts of photomask agent, 1-4 parts of processing aid, which uses polyurethane elastomer as substrate, although tool
There is the advantage that intensity is high, heat-resisting, ageing-resistant, oil resistivity is good, but there are tearing-resistant performance deficiency, flame retardant property is also to be improved,
And not easy to be processed, higher cost.
Summary of the invention
It is high, tear-resistant, fire-retardant the purpose of the present invention is in view of the above-mentioned problems existing in the prior art, proposing a kind of intensity
The good charging pile cable thermoplastic elastomer (TPE) of performance.
Object of the invention can be realized by the following technical scheme:
A kind of automobile parts thermoplastic elastomer (TPE), the thermoplastic elastomer (TPE) is made through gamma-ray irradiation is modified, described
Thermoplastic elastic includes the component of following parts by weight:
32-46 parts of styrenic elastomer,
35-43 parts of polyformaldehyde,
33-43 parts of fire retardant A,
9-14 parts of fire retardant B,
13-18 parts of modified cellulose fibre,
3-6 parts of oil-proof composition,
6-9 parts of softening agent.
Thermoplastic elastomer (TPE) of the invention is modified using gamma-ray irradiation, is chemically crosslinked in blend system, shape
At three-dimensional net structure, effectively improve the microstructure of thermoplastic elastomer (TPE), improve thermoplastic elastomer (TPE) tensile strength,
The mechanical properties such as elongation percentage, impact strength and solvent resistant, high temperature resistance.The present invention is added in styrenic elastomer
Suitable acetal resin, polyformaldehyde density with higher and crystallinity, and hardness is big, modulus is high, good stability of the dimension,
Fatigue durability is prominent, is not easy to be corroded by chemical mediator, the intensity and wear-resisting property of the elastomer that can be effectively improved；The pole of polyformaldehyde
Property it is lower, have certain compatibility with styrenic elastomer, and modified through gamma-ray irradiation, styrenic elastomer and
The compatibility of polyformaldehyde is largely increased；And when without radiation modification, when polyformaldehyde addition content is lower than 35 parts, thermoplastic
Intensity, the impact strength of property elastomer are gradually increased with the increase of polyoxymethylene level, but when more than 35 parts, thermoplastic elastic
The intensity of body will continue to improve, but impact strength can decline to a great extent.Also added with appropriate in thermoplastic elastomer (TPE) of the invention
Cellulose fibre, cellulose fibre toughness with higher and intensity, biggish specific surface area, excellent bond stress can
Significantly improve the tearing-resistant performance, tensile property and intensity of thermoplastic elastomer (TPE).It is modified through gamma-ray irradiation, modified cellulose
The living radical increased activity of fiber surface, to improve the crosslinking degree after thermoplastic elastomer (TPE) irradiation.
Preferably, the styrene series elastomer is the block copolymer containing styryl structures unit, described is embedding
Section copolymer is to hydrogenate that poly- (styrene-block-isoprene), to hydrogenate poly- (styrene-b-butadiene-b- styrene), hydrogenation poly-
It (styrene-block-isoprene-b- styrene) and hydrogenates in poly- (styrene-block-isoprene/butadiene-b- styrene) extremely
Few one kind.
Preferably, the weight percent content of the styrene in the styrene series elastomer is 22-30%.
In the styrene series elastomer without radiation modification, polystyrene is in glassy state, and with the dispersion of spherical microfacies
In polybutadiene microcell, during cross-linking radiation, styrene microfacies acts as the effect of physical crosslinking point, and the present invention is by benzene
The weight percent of ethylene controls within the above range, to control the crosslinking degree after irradiation.If the weight hundred of styrene
Point more too low than content, then crosslinking degree is insufficient, the performance of thermoplastic elastomer (TPE) improve it is limited, if the weight percent of styrene
Too high levels, crosslinking degree will not be further added by, and will lead to the reduction of thermoplastic elastic shock resistance.
Preferably, the fire retardant A includes polyphosphazene 22-26 parts of (in parts by weight) and porous SiO211-17 parts.
The inorganic main chain that polyphosphazene is formed using phosphorus, nitrogen is skeleton, heat resistance and flame retardant property with higher；It is porous
SiO2With excellent heat resistance, and the smog and heat generated in combustion process can be adsorbed, to play reduction smog
With the effect of temperature, the release of harmful substance in combustion process is reduced, the anti-flammability of resin material is effectively improved；Polyphosphazene simultaneously
Macromolecular chain is inserted into porous SiO2Hole in, formed restricted clearance, thus make Synthesis, Characterization of Polyphosphazenes chain carry out spoke
According to molecular configurational damage, guarantee its fire-retardant and heat-resisting performance.
Preferably, the fire retardant B includes magnesium hydroxide 3-5 parts of (in parts by weight), 4-6 parts of aluminium hydroxide, CeO2
1-2 parts.
Magnesium hydroxide, aluminium hydroxide and CeO2The anti-flammability of elastomer, CeO can be effectively improved2Addition have improve inhale
Heat is received, reduces elastomer temperature, further fire-retardant effect.Fire retardant A and fire retardant B can make bullet by synergistic effect
Property body effectively achieve the effect that it is fire-retardant, and have low-smoke low-toxicity.
Preferably, the modified cellulose fibre is the cellulose fibre for being grafted with amino silicones.
The present invention introduces non-polar group amino silicones in cellulose fibre, on the one hand improves and phenylethylene
The compatibility of elastomer, another aspect amino silicones have lower surface energy, brilliant flexible and excellent heat-resisting oxygen
Aging, amino can react with polyformaldehyde surface active groups, and cellulose fibre is made to be partially embedded into polyformaldehyde high score
In son, so that the rigidity of polyformaldehyde be greatly reduced, the flexibility of thermoplastic elastomer (TPE) is improved.Meanwhile modified cellulose after grafting
Fiber surface activity group increases, and is irradiated modified, the living radical increased activity on surface, and it is anti-to peomote crosslinking
The progress answered.
Preferably, the oil-proof composition is hydrogenated styrene block thermoplastic polyurethane copolymer.
Hydrogenated styrene block thermoplastic polyurethane's copolymer is one kind by hydrogenated styrene block copolymers and thermoplasticity
The block copolymer that polyurethane is formed, has both polarity and non-polar character, has with styrene series elastomer and polyformaldehyde good
Compatibility, and have excellent oil resistivity and mechanical property, so as to greatly improve the resistance to of thermoplastic elastomer (TPE) of the present invention
Oiliness energy, and improve intensity and scratch resistance.
Preferably, the softening agent is environment-friendly type technical white oil and/or naphthenic oil.
Another object of the present invention is to provide a kind of automobile parts process for preparation of thermoplastic elastomer, the systems
Preparation Method the following steps are included:
S1, by the component Hybrid Heating of fire retardant A be melt, fire retardant A micro mist is made using atomization；
S2, by modified cellulose fibre and polyformaldehyde Hybrid Heating it is melt, poly- first is made using atomization fast cooling
Aldehyde micro mist, cooling rate are 23-28 DEG C/s；
S3, after styrenic elastomer and softening agent are mixed evenly, 13-18h is stood, fire retardant A is then added
Micro mist, polyformaldehyde micro mist and other raw materials are uniformly mixed, obtain mixed raw material；
S4, by mixed raw material using carrying out melt kneading in double screw extruder and squeeze out that pellet is made；
S5, radiation modification is carried out to pellet using gamma-rays.
The component of fire retardant A and modified cellulose fibre are mixed with polyformaldehyde atomization is respectively adopted first by the present invention
Micro mist is made, micro mist activity with higher can effectively improve the globality of elastomer with other components excellent bonding performance
Energy.Wherein, polyformaldehyde has the characteristics that rapid crystallization, and under the atomization condition of 23-28 DEG C/s speed fast cooling, polyformaldehyde can
New metastable phase is formed, segregation is reduced, improve dispersing uniformity of the cellulose fibre in polyformaldehyde, and improve polyformaldehyde itself
Intensity, plasticity and fatigue crack-resistant ability, be conducive to machine-shaping.And porous SiO2It can divide with modified cellulose fibre
The indescribably crystalline rate of high polyphosphazene polyformaldehyde.
Preferably, the component Hybrid Heating of fire retardant A described in step S1 be melt after, carried out under 400-500w power
It is ultrasonically treated 2-3min.
Ultrasonic treatment can be improved polyphosphazene and porous SiO2Activity, increase polyphosphazene enter porous SiO2In hole
Ratio, to be further ensured that polyphosphazene molecular structure avoids a possibility that being destroyed by high-energy irradiation；And porous SiO2It helps
In the crystal structure for improving the polyphosphazene after micro mist is made, crystal grain is refined, the inhomogeneities of internal crystal structure is reduced.
Preferably, the cooling rate of atomization described in step S1 is 12-16 DEG C/s.
Since the crystallization rate of polyphosphazene is slower, higher cooling rate is unfavorable for its crystallization instead, therefore the present invention will
Its cooling rate control for being atomized hair within the above range, can guarantee polyphosphazene crystalline rate with higher.
Preferably, the irradiation dose of radiation modification described in step S5 is 45-75kGy, time 3-8h.
Irradiation dose cannot be excessively high, cross-linking reaction can otherwise carried out excessively rapid, causes reaction uneven, overlong time
It will cause the degradation reaction in thermoplastic elastomer system, product caused to turn to be yellow.
Compared with prior art, the invention has the following advantages: the present invention has in such a way that gamma-ray irradiation is modified
Effect improves the properties of thermoplastic elastomer (TPE), and avoids polyformaldehyde and styrene series elastomer compatibility when routine is adulterated
Limited and erosion-resisting characteristics increases limited problem；By the component of reasonable compatibility thermoplastic elastomer (TPE), in phenylethylene elasticity
Polyformaldehyde, polyphosphazene, modified cellulose fibre are added in body, effectively increase intensity, toughness, the shock resistance of thermoplastic elastomer (TPE)
Performance, tearing-resistant performance and wear-resisting property；And by the modification to cellulose fibre, styrene series elastomer and poly- first are improved
The compatibility of aldehyde improves cross-linking reaction efficiency；By the synergistic effect of fire retardant A and fire retardant B, thermoplasticity is effectively increased
The heat resistance and anti-flammability of elastomer；
Fire retardant A, modified cellulose and polyformaldehyde are first passed through atomization by specific preparation method by the present invention respectively
Mode forms micro mist, to improve fire retardant A and polyformaldehyde performance, it is equal to improve the dispersion of cellulose fibre in the elastomer
Even property, is conducive to machine-shaping, and then improves the overall performance of elastomer.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
Automobile parts thermoplastic elastomer (TPE) includes the component of following parts by weight in the present embodiment:
32 parts of styrenic elastomer,
43 parts of polyformaldehyde,
22 parts of polyphosphazene,
Porous SiO217 parts,
3 parts of magnesium hydroxide,
6 parts of aluminium hydroxide,
CeO22 parts,
13 parts of modified cellulose fibre,
3 parts of copolymer of oil-proof composition hydrogenated styrene block thermoplastic polyurethane,
6 parts of softening agent naphthenic oil.
Wherein, styrene series elastomer is the block copolymer containing styryl structures unit, the weight percent of styrene
It is 22% than content, block copolymer is the hydrogenation that weight ratio is 1:2 poly- (styrene-block-isoprene) and poly- (the benzene second of hydrogenation
Alkene-b- butadiene-b- styrene)；
Modified cellulose fibre is the cellulose fibre for being grafted with amino silicones.
Embodiment 2
Automobile parts thermoplastic elastomer (TPE) includes the component of following parts by weight in the present embodiment:
36 parts of styrenic elastomer,
40 parts of polyformaldehyde,
23 parts of polyphosphazene,
Porous SiO215 parts,
4 parts of magnesium hydroxide,
5 parts of aluminium hydroxide,
CeO22 parts,
15 parts of modified cellulose fibre,
5 parts of copolymer of oil-proof composition hydrogenated styrene block thermoplastic polyurethane,
7 parts of softening agent naphthenic oil.
Wherein, styrene series elastomer is the block copolymer containing styryl structures unit, the weight percent of styrene
It is 25% than content, block copolymer is the hydrogenation that weight ratio is 1:2 poly- (styrene-block-isoprene) and the poly- (benzene of hydrogenation
Ethylene-b- butadiene-b- styrene)；
Modified cellulose fibre is the cellulose fibre for being grafted with amino silicones.
Embodiment 3
Automobile parts thermoplastic elastomer (TPE) includes the component of following parts by weight in the present embodiment:
40 parts of styrenic elastomer,
38 parts of polyformaldehyde,
25 parts of polyphosphazene,
Porous SiO213 parts,
4 parts of magnesium hydroxide,
5 parts of aluminium hydroxide,
CeO21 part,
16 parts of modified cellulose fibre,
5 parts of copolymer of oil-proof composition hydrogenated styrene block thermoplastic polyurethane,
8 parts of softening agent technical white oil.
Wherein, styrene series elastomer is the block copolymer containing styryl structures unit, the weight percent of styrene
It is 28% than content, block copolymer is the hydrogenation that weight ratio is 2:3 poly- (styrene-block-isoprene-b- styrene) and hydrogen
Change poly- (styrene-block-isoprene/butadiene-b- styrene)；
Modified cellulose fibre is the cellulose fibre for being grafted with amino silicones.
Embodiment 4
Automobile parts thermoplastic elastomer (TPE) includes the component of following parts by weight in the present embodiment:
46 parts of styrenic elastomer,
35 parts of polyformaldehyde,
26 parts of polyphosphazene,
Porous SiO211 parts,
5 parts of magnesium hydroxide,
4 parts of aluminium hydroxide,
CeO21 part,
18 parts of modified cellulose fibre,
6 parts of copolymer of oil-proof composition hydrogenated styrene block thermoplastic polyurethane,
9 parts of softening agent naphthenic oil.
Wherein, styrene series elastomer is the block copolymer containing styryl structures unit, the weight percent of styrene
It is 30% than content, block copolymer is the hydrogenation that weight ratio is 2:3 poly- (styrene-block-isoprene-b- styrene) and hydrogen
Change poly- (styrene-block-isoprene/butadiene-b- styrene)；
Modified cellulose fibre is the cellulose fibre for being grafted with amino silicones.
Embodiment 5
Automobile parts process for preparation of thermoplastic elastomer in the present embodiment the following steps are included:
(1) raw material is prepared according to the formula in embodiment 3, by polyphosphazene and porous SiO2Hybrid Heating is melt, then
It being ultrasonically treated 3min under 400w power, then fire retardant A micro mist is made using atomization, cooling rate when atomization is 12 DEG C/
s；
(2) it is melt by modified cellulose fibre and polyformaldehyde Hybrid Heating, poly- first is made using atomization fast cooling
Aldehyde micro mist, atomization cooling rate are 23 DEG C/s；
(3) after styrenic elastomer and softening agent being mixed evenly, 13h is stood, it is micro- that fire retardant A is then added
Powder, polyformaldehyde micro mist and other raw materials are uniformly mixed, obtain mixed raw material；
(4) mixed raw material is used and carries out melt kneading in double screw extruder and squeeze out that pellet is made, extrusion temperature is
170 DEG C, screw speed 400rpm；
(5) radiation modification is carried out to pellet using gamma-rays, the irradiation dose of radiation modification is 45kGy, time 8h.
Embodiment 6
Automobile parts process for preparation of thermoplastic elastomer in the present embodiment the following steps are included:
(1) raw material is prepared according to the formula in embodiment 3, by polyphosphazene and porous SiO2Hybrid Heating is melt, then
It being ultrasonically treated 3min under 460w power, then fire retardant A micro mist is made using atomization, cooling rate when atomization is 14 DEG C/
s；
(2) it is melt by modified cellulose fibre and polyformaldehyde Hybrid Heating, poly- first is made using atomization fast cooling
Aldehyde micro mist, atomization cooling rate are 25 DEG C/s；
(3) after styrenic elastomer and softening agent being mixed evenly, 13h is stood, it is micro- that fire retardant A is then added
Powder, polyformaldehyde micro mist and other raw materials are uniformly mixed, obtain mixed raw material；
(4) mixed raw material is used and carries out melt kneading in double screw extruder and squeeze out that pellet is made, extrusion temperature is
170 DEG C, screw speed 400rpm；
(5) radiation modification is carried out to pellet using gamma-rays, the irradiation dose of radiation modification is 60kGy, time 5h.
Embodiment 7
Automobile parts process for preparation of thermoplastic elastomer in the present embodiment the following steps are included:
(1) raw material is prepared according to the formula in embodiment 3, by polyphosphazene and porous SiO2Hybrid Heating is melt, then
It being ultrasonically treated 2min under 460w power, then fire retardant A micro mist is made using atomization, cooling rate when atomization is 16 DEG C/
s；
(2) it is melt by modified cellulose fibre and polyformaldehyde Hybrid Heating, poly- first is made using atomization fast cooling
Aldehyde micro mist, atomization cooling rate are 25 DEG C/s；
(3) after styrenic elastomer and softening agent being mixed evenly, 13h is stood, it is micro- that fire retardant A is then added
Powder, polyformaldehyde micro mist and other raw materials are uniformly mixed, obtain mixed raw material；
(4) mixed raw material is used and carries out melt kneading in double screw extruder and squeeze out that pellet is made, extrusion temperature is
170 DEG C, screw speed 400rpm；
(5) radiation modification is carried out to pellet using gamma-rays, the irradiation dose of radiation modification is 63kGy, time 4h.
Embodiment 8
Automobile parts process for preparation of thermoplastic elastomer in the present embodiment the following steps are included:
(1) raw material is prepared according to the formula in embodiment 3, by polyphosphazene and porous SiO2Hybrid Heating is melt, then
It being ultrasonically treated 2min under 500w power, then fire retardant A micro mist is made using atomization, cooling rate when atomization is 16 DEG C/
s；
(2) it is melt by modified cellulose fibre and polyformaldehyde Hybrid Heating, poly- first is made using atomization fast cooling
Aldehyde micro mist, atomization cooling rate are 28 DEG C/s；
(3) after styrenic elastomer and softening agent being mixed evenly, 18h is stood, it is micro- that fire retardant A is then added
Powder, polyformaldehyde micro mist and other raw materials are uniformly mixed, obtain mixed raw material；
(4) mixed raw material is used and carries out melt kneading in double screw extruder and squeeze out that pellet is made, extrusion temperature is
170 DEG C, screw speed 400rpm；
(5) radiation modification is carried out to pellet using gamma-rays, the irradiation dose of radiation modification is 75kGy, time 3h.
Embodiment 9-11
Respectively according to the component proportion in embodiment 1,2,4, thermoplastic elastomer (TPE) is prepared according to the method in embodiment 6.
Comparative example 1
It does not include polyformaldehyde in the component of thermoplastic elastomer (TPE), other are same as Example 6.
Comparative example 2
It does not include modified cellulose fibre in the component of thermoplastic elastomer (TPE), other are same as Example 6.
Comparative example 3
Modified cellulose fibre is replaced with conventional unmodified cellulose fiber, other are same as Example 6.
Comparative example 4
The weight percent content of styrene in styrene series elastomer is greater than 30%, other are same as Example 6.
Comparative example 5
It does not include polyphosphazene in the component of thermoplastic elastomer (TPE), other are same as Example 6.
Comparative example 6
It does not include porous SiO in the component of thermoplastic elastomer (TPE)2, other are same as Example 6.
Comparative example 7
With conventional non-porous SiO2Instead of porous SiO2, other are same as Example 6.
Comparative example 8
It does not include CeO in the component of thermoplastic elastomer (TPE)2, other are same as Example 6.
Comparative example 9
Directly modified cellulose fibre, polyformaldehyde are proportionally added into preparation method, are uniformly mixed, other and embodiment
6 is identical.
Comparative example 10
In the preparation process of polyformaldehyde micro mist, cooling rate is lower than 23 DEG C/s, other are same as Example 6.
Comparative example 11
Polyphosphazene and porous SiO2Hybrid Heating is not sonicated ultrasonic treatment after melt, other and 6 phase of embodiment
Together.
Comparative example 12
For manufactured pellet without gamma-ray irradiation, other are same as Example 6.
Comparative example 13
Manufactured pellet is without gamma-ray irradiation, but the content of polyformaldehyde is 30 parts, other are same as Example 6.
Comparative example 14
Conventional styrenic thermoplastic elastomer (TPE).
Thermoplastic elastomer (TPE) obtained in 5-11 of the embodiment of the present invention, comparative example 1-13 is taken, carries out performance detection respectively, is tied
Fruit is as shown in table 1.Wherein, the test of properties according to and test condition are as follows: hardness is measured according to GB/T531.11, and anti-tensile is strong
Degree and elongation at break are measured according to GB/T2951.12, and thermal shock resistance is according to GB/T2951.31 in (150 ± 1 DEG C) × 3h
Under the conditions of measure, flame retardant property is measured according to UL94 flammability test, and thermal deformation is measured according to UL1581 standard in 150 DEG C, tearing
Intensity is measured according to GB/T529.
Table 1: the comparison of thermoplastic elastomer (TPE) performance obtained in embodiment 5-11, comparative example 1-13
In conclusion the present invention passes through the component of reasonable compatibility thermoplastic elastomer (TPE), and by specific preparation method, have
Effect improves the mechanical property of thermoplastic elastomer (TPE), the performances such as tear-resistant, heat-resisting, fire-retardant, is prepared using the thermoplastic elastomer (TPE)
Automobile parts have excellent service performance and longer service life.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (9)
1. a kind of automobile parts thermoplastic elastomer (TPE), which is characterized in that the thermoplastic elastomer (TPE) is modified through gamma-ray irradiation
It is made, the thermoplastic elastic includes the component of following parts by weight:
32-46 parts of styrenic elastomer,
35-43 parts of polyformaldehyde,
33-43 parts of fire retardant A,
9-14 parts of fire retardant B,
13-18 parts of modified cellulose fibre,
3-6 parts of oil-proof composition,
6-9 parts of softening agent.
2. thermoplastic elastomer (TPE) according to claim 1, which is characterized in that the styrene series elastomer is to contain benzene second
The block copolymer of alkene structural units, the block copolymer are to hydrogenate poly- (styrene-block-isoprene), the poly- (benzene of hydrogenation
Ethylene-b- butadiene-b- styrene), hydrogenate poly- (styrene-block-isoprene-b- styrene) and hydrogenate poly- (styrene-b-
At least one of isoprene/butadiene-b- styrene).
3. thermoplastic elastomer (TPE) according to claim 1, which is characterized in that the fire retardant A includes (in parts by weight)
22-26 parts of polyphosphazene and porous SiO211-17 parts.
4. thermoplastic elastomer (TPE) according to claim 1, which is characterized in that the fire retardant B includes (in parts by weight)
3-5 parts of magnesium hydroxide, 4-6 parts of aluminium hydroxide, CeO21-2 parts.
5. thermoplastic elastomer (TPE) according to claim 1, which is characterized in that the modified cellulose fibre is to be grafted with ammonia
The cellulose fibre of based polysiloxane.
6. thermoplastic elastomer (TPE) according to claim 1, which is characterized in that the oil-proof composition is hydrogenated styrene block heat
Plasticity polyurethane copolymer.
7. one kind automobile parts process for preparation of thermoplastic elastomer as described in claim 1-6 any claim, special
Sign is, the preparation method the following steps are included:
S1, by the component Hybrid Heating of fire retardant A be melt, fire retardant A micro mist is made using atomization；
S2, by modified cellulose fibre and polyformaldehyde Hybrid Heating it is melt, it is micro- that polyformaldehyde is made using atomization fast cooling
Powder, cooling rate are 23-28 DEG C/s；
S3, after styrenic elastomer and softening agent are mixed evenly, stand 13-18h, then be added fire retardant A micro mist,
Polyformaldehyde micro mist and other raw materials are uniformly mixed, obtain mixed raw material；
S4, by mixed raw material using carrying out melt kneading in double screw extruder and squeeze out that pellet is made；
S5, radiation modification is carried out to pellet using gamma-rays.
8. preparation method according to claim 7, which is characterized in that the component Hybrid Heating of fire retardant A described in step S1
After melt, ultrasonic treatment 2-3min is carried out under 400-500w power.
9. preparation method according to claim 8, which is characterized in that the irradiation dose of radiation modification described in step S5 is
45-75kGy, time 3-8h.
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