CN109251489A - PVA fiber reinforcement flame-retardant PBT-PET alloy composite material and preparation method and application - Google Patents
PVA fiber reinforcement flame-retardant PBT-PET alloy composite material and preparation method and application Download PDFInfo
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/046—Reinforcing macromolecular compounds with loose or coherent fibrous material with synthetic macromolecular fibrous material
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08J2425/00—Characterised by the use 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 an aromatic carbocyclic ring; Derivatives of such polymers
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- C08J2429/00—Characterised by the use 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 an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
- C08K5/03—Halogenated hydrocarbons aromatic, e.g. C6H5-CH2-Cl
Abstract
The present invention relates to field of polymer composite material, it more particularly to a kind of PVA fiber reinforcement flame-retardant PBT-PET alloy composite material, is prepared by following component in parts by weight: 22-37 parts of polybutylene terephthalate (PBT), 22-37 parts of polyethylene terephthalate, 14-19 parts of main flame retardant, 3-5 parts of auxiliary flame retardant, 0.2-2 parts of antioxidant, 0.2-2 parts of coupling agent, 0.5-2 parts of lubricant, 0.2-2 parts of compatilizer, 0.5-2 parts of crosslinking agent and 10-40 parts of vinal.The present invention also provides PVA fiber reinforcement flame-retardant PBT-PET alloy composite material preparation method and application.Not only intensity improves PBT-PET alloy composite materials provided by the present invention, and toughness also improves simultaneously, the big disadvantage of fiber glass reinforcement brittleness is overcome, while PBT-PET alloy flame retardant property also reaches the V0 rank of vertical combustion UL94 standard, expands the application range of material.
Description
Technical field
The present invention relates to field of polymer composite material, and in particular to a kind of PVA fiber reinforcement flame-retardant PBT-PET alloy is multiple
Condensation material and preparation method and application.
Background technique
Cost is relatively low, intensity is higher for polyethylene terephthalate (PET), and polybutylene terephthalate (PBT)
(PBT) crystalline rate is higher, molding cycle is short, and the two chemical structure is similar, so having preferable compatibility, melt blending system
Standby high-performance, low cost PET/PBT blend can be used as engineering plastics use, this is equal to its mechanical property, flame retardant property
It has higher requirements.
Glass fibre (GF, abbreviation glass) enhancing is a kind of important way that thermoplastic polymer is applied as engineering plastics
Diameter, after being added into PET/PBT co-mixing system, impact strength, tensile strength, the bending strength of resulting PET/PBT blend
Increase.But the abrasion between glass and between glass and resin easily cause PBT, PET molecular chain rupture, PET/
The brittleness and notch sensitivity of PBT alloy are strong, and notch impact strength is lower, and toughness is inadequate, limit its use scope.Cause
This, polyvinyl alcohol (PVA) fiber is increasingly becoming the substitute of glass, is frequently used for the enhancing of construction material such as cement, concrete
In toughening, still, when PVA fiber is used for alloy composite materials, since its hot water resistance is poor, heated easy decomposition, make
PVA fiber bonds unstable with alloy；And PVA fiber mechanical property it is also not fully up to expectations (such as glass modulus be 225~
The modulus of 263cN/dtex, PVA fiber is 176~236cN/dtex) so that the mechanical property of its enhanced alloy material
It is not outstanding；In addition, the shortcomings that there is also easy extrudings when PVA fiber is blended with alloy material, therefore current those skilled in the art
Member, which rarely has, is used for activeness and quietness alloy composite materials for PVA fiber.
Moreover, with the raising that people's fire safety is realized, the macromolecule material applied in the industries such as automobile, electric
Expect flame-retardant modified to have become necessity.PBT/PET alloy, which usually requires addition third component toughener, just can effectively improve alloy
Notched impact properties, and the addition of fire retardant then cannot significantly destroy the interfacial adhesion between PBT, PET, toughener three
Power, while fire retardant will meet has good compatibility with substrate, and flame-retardant PBT/PET alloy can just be made to reach fire-retardant same
When keep mechanical property, especially notched impact properties.
At present it is high molecular it is fire-retardant all favor in halogen-free flameproof, such as phosphorus flame retardant, silicon-series five-retardant, wherein phosphorus system resistance
Agent is fired at present there are still some shortcomings such as thermal stability and hydrolytic stability are poor, side reaction is more in production and processing and use process,
Although price is lower, volume causes mechanical property to decline by a relatively large margin greatly；Although silicon-series five-retardant has in alloy material
Volume is low and highly effective flame-retardant feature, but there is also the defects of effect is poor is used alone.
Summary of the invention
The purpose of the present invention is to provide a kind of PVA fiber reinforcement flame-retardant PBT-PET alloy composite material and its application, with
It is one or several in solving the above problems.
It is another object of the present invention to provide the systems of above-mentioned PVA fiber reinforcement flame-retardant PBT-PET alloy composite material
Preparation Method, with one or several in solving the above problems.
According to an aspect of the invention, there is provided a kind of PVA fiber reinforcement flame-retardant PBT-PET alloy composite material, by
Following component in parts by weight is prepared: 22-37 parts of PBT, 22-37 parts of PET, and 14-19 parts of main flame retardant, assisting flame-resistant
3-5 parts of agent, 0.2-2 parts of antioxidant, 0.2-2 parts of coupling agent, 0.5-2 parts of lubricant, 0.2-2 parts of compatilizer, 0.5-2 parts of crosslinking agent
With with 10-40 parts of vinal.
Wherein, PVA fiber is chopped strand, and fibre diameter is 1 μm~15 μm.As a result, when being blended with other components,
PVA chopped strand is easily processed into type, bonds with basis material, can be preferably mixed in system with threadiness, to play
Activeness and quietness effect；If PVA fibre diameter is too long, it is easy to happen fracture in the blending process, reduces functional effect；If PVA is fine
It is too short to tie up diameter, then does not have the effect of activeness and quietness.
In some embodiments, in parts by weight include following component: 22 parts of PBT, 22 parts of PET, main flame retardant 17
Part, 5 parts of auxiliary flame retardant, 0.9 part of antioxidant, 1 part of silane coupling agent, 2 parts of lubricant, 1 part of compatilizer, 1 part of crosslinking agent, PVA
35 parts of fiber.
In some embodiments, main flame retardant is brominated Polystyrene (BPS), brominated epoxy resin, decabrominated dipheny second
Alkane (C14H4Br10) or deca-BDE (C12Br10One or more of O), auxiliary flame retardant is sodium antimonate (NaSbO3), three
Aoxidize two antimony (Sb2O3), magnesium hydroxide [Mg (OH)2One or more of] or phosphate compounds.Material combustion as a result,
When main flame retardant decomposition release hydrogen bromide, hydrogen bromide capture transmitting pyric chain or free radical generate the lower bromine free radical of activity
To slow down or extinction, while the bromine system free radical generated when hydrogen bromide and burning has non-volatile and low migration,
It is easy to generate diluting effect to oxygen to be also beneficial to prevent burning, therefore, based on bromide fire retardant on the surface of burning
Fire retardant, inorganic fire retardants are auxiliary flame retardant, and auxiliary flame retardant plays synergistic effect, can increase substantially main flame retardant
Flame retarding efficiency, the two be used in compounding to PBT-PET alloy material carry out it is flame-retardant modified so that modified alloy material is preferably
Applied to hot environment, (polyester resin of fire retardant and fibre modification is generally not added, and be used for a long time at 80 DEG C -120 DEG C will aging
Become fragile, the modified resin of fire retardant and PVA fiber is added then can be in 140 DEG C -200 DEG C of hot environment use), expand alloy
The scope of application of material；Moreover, main flame retardant is good with macromolecule group substrate compatibility, it is not easy to be precipitated or migrate.
In some embodiments, antioxidant is metal ion stabilizing agents, in phosphite antioxidant, phenolic antioxidant
It is at least one.Thus, it is possible to hinder the oxidation reaction of high molecular material during heating, prevent high molecular material due to oxidation
Degradation.
Specifically, antioxidant is four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester (trade names
At least one of antioxidant 1010) or three (2,4- di-tert-butyl-phenyl) phosphite esters (trade name irgasfos 168).
In some embodiments, coupling agent is silicone coupling agents, titanate coupling agent, aluminate coupling agent, aluminium titanium
At least one of composite coupler can be purchased from commercially available.Addition coupling agent improves between PBT, PET, PVA fiber as a result,
Compatibility, increase the binding force between them, improve the mechanical property of composite material.
Wherein, silicone coupling agents are selected from three ethoxy silane of 3- silicohetane oxyalkyl -1- propylamine or γ-amine propyl
(trade name KH550), γ-glycidyl ether oxygen propyl trimethoxy silicane (trade name KH560), γ-methacryl
Oxygroup propyl trimethoxy silicane (trade name KH570), N- (β-aminoethyl)-γ-aminopropyltriethoxy diethoxy silane (quotient
The name of an article is KH602), isocyanatopropyl triethoxysilane (trade name IPTS), vinyltrimethoxysilane (trade name
A-171), vinyltriethoxysilane (trade name A-151), vinyl methyl diethoxy silane, sulfonyl azide silane
(trade name S-3046), γ-neon propyl front three nitrogen base silane (trade name A-143), 2- (3,4- 7-oxa-bicyclo[4.1.0 base) second
At least one of base trimethoxy silane (trade name A-186),
Aluminate coupling agent is distearyl acyl-oxygen isopropyl Aluminate (trade name SG-Al821),
Titanate coupling agent is two oleic acid acyloxy of isopropyl (dioctyl phosphoric acid acyloxy) titanate esters (trade name NDZ-
101),
Aluminium titanium composite coupler is OL-AT1618 (trade name), and main component is using alkoxytitanium, aluminum alkoxide as base
The condensation product of plinth and Long carbon chain fatty acid, dihydric alcohol.
In some embodiments, lubricant is fatty acid, pentaerythritol stearate, N, N'- ethylene bis stearamide
And its at least one of modifier, calcium stearate, zinc stearate, aluminum stearate, silicone powder, silicone master batch, polyethylene wax.By
This, can reduce the kinematic viscosity of melt polymer material state, be convenient for subsequent processing.
In some embodiments, compatilizer is that epoxy resin and its modifier, styrene copolymer, maleic anhydride connect
One of branch object, glycidyl acrylate class modifier.As a result, in whole system, compatilizer, which plays, increases PBT, PET
The effect of two kinds of polymer compatibility makes the bonding force between two kinds of polymer become larger, and forms stable structure, and make dispersed phase
With continuous phase uniformly, compatibilized.
In some embodiments, crosslinking agent 2, bis- (tert-butyl peroxy base) hexanes (AD) of 5- dimethyl -2,5-, peroxidating
At least one of diisopropylbenzene (DIPB) (DCP), benzoyl peroxide (BPO), pyromellitic acid anhydride.
PVA fiber reinforcement PBT-PET alloy composite materials provided by the present invention, due to two resin matrix component PBT,
PET have good compatibility, thus between different component the transmitting of stress be it is easy to perform, especially PBT strand is soft
Property it is big, it is easier to transmitting and sorption enhanced impact energy, and PVA fiber it is added cross coupling agent surface treatment post-processing, easily
It is crosslinked with PBT, PET strand and cementation, can be transmitted on PVA fiber, pass through when resin matrix absorbs impact energy
Impact energy is further dispersed in biggish volume by PVA fiber, shows as the raising of impact property；
Moreover, PVA plays crosslinked action in system, PVA fiber and PBT, PET end group interact, increase them it
Between interface binding power, limit a wide range of activity of polyester molecule chain, a large amount of PBT, PET strand shortrange order can be made
Arrangement, so that high molecular polymer is finer and close, helps to improve the heat resistance of whole system.
According to another aspect of the present invention, a kind of fire-retardant poly terephthalic acid fourth two of vinal enhancing is provided
The preparation method of alcohol ester and polyethylene terephthalate alloy composite materials, steps are as follows:
1) get raw material ready in proportion, by polybutylene terephthalate (PBT), polyethylene terephthalate, fire retardant,
Antioxidant, coupling agent, lubricant, crosslinking agent, compatilizer are mixed for the first time, add vinal and second mixed
It closes；
2) pass through double screw extruder melting, mixing, extrusion, cooling, dry, pelletizing.
In some embodiments, mixing is uniformly mixed through high mixer for the first time in step 1), revolving speed 900-
1500rpm；It is a kind of stirring being composed with multistage different length shearing threaded block that second, which mixes used equipment,
Device, mixing revolving speed are 100-150rpm；The Design of Rotation of first high speed low speed again is taken as a result, and has multistage different
The agitating device that length shearing threaded block is composed is kept away so that PVA fiber is sufficiently mixed under the conditions of the slow-speed of revolution with each raw material
Exempted from the prior art in whipping process PVA staple fiber since high speed (400-1500rpm) mixing will become as cotton mass one
The foaming extruding situation of sample seriously affects the problem of production and processing.
In some embodiments, each area's temperature of double-screw extruding machine barrel is maintained between 175-260 DEG C in step 2).
Wherein, 1st area is charging zone, 2,3 areas are melting zone, that is, reaches the melting temperature of PET and PBT, wherein 1 area's temperature is protected
It holds at 220 DEG C, 2 area's temperature are maintained at 255 DEG C, and 3 area's temperature are maintained at 250 DEG C；4th~7 area are that (wherein 4th area are lower fibre for homogenization zone
Area), using the low melting point for adapting to PVA fiber, it is maintained at 175~200 DEG C；8th area and nose region are by the way of higher temperature
Effectively to control be combineding with each other between PET and PBT and PVA fiber, wherein 8th area and head area temperature be maintained at 185~
260℃.As a result, in barrel suitable temperature setting cooperation multistage different length shearing threaded block combination, make PET and PBT with
And PVA fibre compact combines；Double screw extruder is also improved by the combination that six sections of different lengths shear threaded block simultaneously
Shearing force, performance characteristic are the promotion of notch impact strength and tensile strength.
Specifically, the combination for shearing threaded block includes six sections of cutouts, since motor position, degree/5 one section: 44mm/45
Piece, degree/5/ piece 56mm/45, degree/5 piece two sections: 56mm/45, degree/5 piece 56mm/45, degree/5 piece three sections: 56mm/45,56mm/90
Degree/5, degree/5 piece four sections: 56mm/45, degree/5 piece five sections: 56mm/45, degree/5 piece six sections: 56mm/45, degree/5 56mm/45
Piece, degree/5 piece 56mm/90.
In the blending process, all substrates are changed into liquid phase from solid phase with the promotion of barrel temperature, squeeze in twin-screw
Under the mechanism of pressure, each liquid phase substrate is blended together, and considerably increases the interface binding power between resin, fiber, mentions
The mechanical property of high binding force and alloy composite materials between resin and fiber；And six sections used in this application not
The temperature in vinal region is added with the agitating mode of length shearing threaded block combination and control, not only overcomes
PVA fiber hot water resistance is poor and easily decomposed disadvantage of being heated, and avoid in the prior art PVA fiber due to height
The problem of warm high speed foaming extruding is to influence product quality, facilitates production and processing.
Vinal enhancing fire retardant polybutylene terephthalate and poly terephthalic acid provided by the present invention
Glycol ester alloy composite materials can operate with manufacture electronic apparatus component such as connect, plug and skeleton, it can also be used to it is electronic
Tool housing, fishing gear, coil rack, gear, high-speed rail gauge apron and casing；It can be also used for automobile component such as door handle, fall
Che Jing, ignition system, pedal etc. and household electrical appliance such as electric iron, terminal box and temperature detect switch (TDS) etc., IT industry can also be by
For fan blade transmission parts such as cooling fan etc..
The present invention replaces glass fibre to polybutylene terephthalate (PBT) (PBT) and poly- with polyvinyl alcohol (PVA) fiber
Ethylene glycol terephthalate (PET) alloy composite materials are modified, while the fire retardant after compounding is added, so that modified
PBT-PET alloy composite materials not only intensity increases, but also toughness also improves simultaneously, overcomes glass fiber reinforcement material
Expect the big disadvantage of brittleness, while PBT-PET alloy flame retardant property also reaches the V0 rank of vertical combustion UL94 standard, expands material
Application range, can be used safely in electronic apparatus component such as connect, plug and skeleton；Housing of electric tool,
Fishing gear, coil rack, gear, high-speed rail gauge apron and casing；Automobile component such as door handle, side mirror, ignition system, pedal
Deng；Household electrical appliance such as electric iron, terminal box and temperature detect switch (TDS) etc.；Cooling fan is largely used in IT industry.
Specific embodiment
The present invention will be further described in detail below with reference to specific embodiments.Unless otherwise specified, following reagent is equal
To be commercially available, PVA fiber therein is purchased from Sinopec Group Sichuan dimension Buddhist nun using the PVA fiber of high-temperature-resistant high Gao Mo
Synthetic fibre factory.
By the component proportion relationship of 1~embodiment of embodiment 10 in table 1, by PBT, PET, fire retardant, coupling agent, antioxygen
Agent, lubricant, crosslinking agent and compatibiliser are put into high mixer and are uniformly mixed with 900-1500rpm revolving speed, and polyvinyl alcohol is added
(PVA) fiber with revolving speed 100-150rpm after mixing, by double screw extruder melting, be kneaded, squeeze out, it is cooling, dry,
Pelletizing.
Wherein, each area's temperature conditions of the double-screw extruding machine barrel of Examples 1 to 10 is as shown in table 2:
Each area's temperature conditions of the double-screw extruding machine barrel of 2 Examples 1 to 10 of table (unit: DEG C)
| 1st area | 2nd area | 3rd area | 4th area | 5th area | 6th area | 7th area | 8th area | Head | |
| Embodiment 1 | 220 | 255 | 250 | 190 | 175 | 180 | 190 | 200 | 260 |
| Embodiment 2 | 220 | 255 | 250 | 195 | 175 | 180 | 180 | 190 | 255 |
| Embodiment 3 | 220 | 255 | 250 | 195 | 190 | 190 | 190 | 210 | 260 |
| Embodiment 4 | 220 | 255 | 250 | 190 | 175 | 175 | 180 | 190 | 260 |
| Embodiment 5 | 220 | 255 | 250 | 185 | 190 | 190 | 180 | 185 | 255 |
| Embodiment 6 | 220 | 255 | 250 | 190 | 185 | 180 | 175 | 195 | 260 |
| Embodiment 7 | 220 | 255 | 250 | 190 | 185 | 185 | 175 | 180 | 255 |
| Embodiment 8 | 220 | 255 | 250 | 180 | 180 | 185 | 200 | 210 | 260 |
| Embodiment 9 | 220 | 255 | 250 | 185 | 180 | 190 | 200 | 205 | 255 |
| Embodiment 10 | 220 | 255 | 250 | 175 | 175 | 180 | 185 | 190 | 260 |
PBT-PET alloy composite materials prepared by 1~embodiment of embodiment 10, PVA chopped strand still keep original state,
There is no the extruding phenomenons that foams for PVA fiber in whipping process.
As a comparison, vinal is replaced with toughener and short glass fiber (GF), is added in reaction system,
Wherein, toughener is acrylate and the Bifunctionalized vinyl elastomer (trade name KT-22) of ethylene oxidic ester.
By the component and proportion relation of comparative example 1~5 shown in table 1, by PBT, PET, toughener KT-22, coupling
Agent, filler, antioxidant, lubricant and crosslinking agent are put into high mixer and are uniformly mixed with 900-1500rpm revolving speed, are added short
It cuts glass fibre to be uniformly mixed with revolving speed 100-150rpm, is then melted by double screw extruder, is kneaded, squeezes out, is cooling, dry
Dry, pelletizing.Wherein, each area's temperature conditions of double-screw extruding machine barrel used in comparative example 1~5 is as shown in table 3:
Each area's temperature conditions of double-screw extruding machine barrel (unit: DEG C) of 3 comparative example 1~5 of table
| 1st area | 2nd area | 3rd area | 4th area | 5th area | 6th area | 7th area | 8th area | Head | |
| Comparative example 1 | 225 | 255 | 250 | 190 | 175 | 180 | 190 | 200 | 260 |
| Comparative example 2 | 225 | 255 | 250 | 195 | 175 | 180 | 180 | 190 | 255 |
| Comparative example 3 | 225 | 255 | 250 | 195 | 190 | 190 | 190 | 210 | 260 |
| Comparative example 4 | 225 | 255 | 250 | 190 | 175 | 175 | 180 | 190 | 255 |
| Comparative example 5 | 225 | 255 | 250 | 185 | 190 | 190 | 180 | 185 | 260 |
To by composite wood prepared by Examples 1 to 10 component proportion relationship, the component of comparative example 1~5 and proportion relation
Material carries out Mechanics Performance Testing as follows:
According to the stretching of the method measurement gained composite material in " measurement of plastics-tensile property " (ISO527-2012)
Intensity；
According to " plastics-tensile property measurement the 4th part homogeneous of and heterogeneous reinforced fiber plastics composite materials testing article
Part " method measurement gained composite material in (ISO527-4-1997) elongation；
According to the bending of the method measurement gained composite material in " measurement of plastics-bending property " (ISO178-2010)
Intensity and bending modulus；
According to the method measurement gained composite material in " measurement of plastics-pendulum-type impact performance " (ISO179-2010)
Notch impact strength；
The measurement result of above-mentioned each mechanical property token state is recorded in table 3.
Compared from measurement result: in terms of existing technologies, notched impact properties has the composite material of the application
It significantly improves, and whole mechanical property has made marked progress.
Combustibility test is carried out to alloy composite materials prepared by Examples 1 to 10, comparative example 1~5, according to 94V-
0 standard carries out every part of sample 10 seconds twice combustion testings, is recorded twice the burning time t with flare respectively1、t2, and
By total burn time (t1+t2) it is recorded in table 4.
4 flame-retardant reinforced PBTs of table/PET alloy combustibility
| Group | Flame retardant rating | Total burn time |
| Embodiment 1 | V0 | 25.9 seconds |
| Embodiment 2 | V0 | 26.8 seconds |
| Embodiment 3 | V0 | 25.3 seconds |
| Embodiment 4 | V0 | 22.7 seconds |
| Embodiment 5 | V0 | 23.7 seconds |
| Embodiment 6 | V0 | 26.1 seconds |
| Embodiment 7 | V0 | 24.3 seconds |
| Embodiment 8 | V0 | 29.2 seconds |
| Embodiment 9 | V0 | 23.3 seconds |
| Embodiment 10 | V0 | 28.1 seconds |
| Comparative example 1 | V0 | 35.8 seconds |
| Comparative example 2 | V0 | 33.2 seconds |
| Comparative example 3 | V0 | 41.9 seconds |
| Comparative example 4 | V0 | 37.6 seconds |
| Comparative example 5 | V0 | 34.3 seconds |
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
The comparison of 3 mechanical experimental results of table
Claims (10)
1.PVA fiber reinforcement flame-retardant PBT-PET alloy composite material, which is characterized in that by following component system in parts by weight
It is standby to form: 22-37 parts of polybutylene terephthalate (PBT), 22-37 parts of polyethylene terephthalate, main flame retardant 14-19
Part, it 3-5 parts of auxiliary flame retardant, 0.2-2 parts of antioxidant, 0.2-2 parts of coupling agent, 0.5-2 parts of lubricant, 0.2-2 parts of compatilizer, hands over
Agent 0.5-2 parts and 10-40 parts of vinal of connection.
2. PVA fiber reinforcement flame-retardant PBT-PET alloy composite material according to claim 1, which is characterized in that the master
Fire retardant is one or more of brominated Polystyrene, brominated epoxy resin, decabromodiphenylethane or deca-BDE；Institute
Stating auxiliary flame retardant is one or more of sodium antimonate, antimony oxide, magnesium hydroxide or phosphate compounds.
3. PVA fiber reinforcement flame-retardant PBT-PET alloy composite material according to claim 2, which is characterized in that described anti-
Oxygen agent is four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters and/or three (2,4- di-tert-butyl-phenyls)
Phosphite ester.
4. PVA fiber reinforcement flame-retardant PBT-PET alloy composite material according to claim 3, which is characterized in that the idol
Connection agent is at least one of silicone coupling agents, titanate coupling agent, aluminate coupling agent, aluminium titanium composite coupler.
5. PVA fiber reinforcement flame-retardant PBT-PET alloy composite material according to claim 4, which is characterized in that the profit
Lubrication prescription is fatty acid, pentaerythritol stearate, N, N'- ethylene bis stearamide and its modifier, calcium stearate, stearic acid
At least one of zinc, aluminum stearate, silicone powder, silicone master batch, polyethylene wax.
6. PVA fiber reinforcement flame-retardant PBT-PET alloy composite material according to claim 5, which is characterized in that the phase
Holding agent is that epoxy resin and its modifier, styrene copolymer, maleic anhydride grafts, glycidyl acrylate class are modified
One of object.
7. PVA fiber reinforcement flame-retardant PBT-PET alloy composite material according to claim 6, which is characterized in that the friendship
Joining agent is bis- (tert-butyl peroxy base) hexanes of 2,5- dimethyl -2,5-, cumyl peroxide, benzoyl peroxide, equal benzene tetramethyl
At least one of acid dianhydride.
8. the preparation method of the described in any item PVA fiber reinforcement flame-retardant PBT-PET alloy composite materials of claim 1~7,
It is characterized in that, steps are as follows:
1) raw material is got ready in proportion, by polybutylene terephthalate (PBT), polyethylene terephthalate, fire retardant, antioxygen
Agent, coupling agent, lubricant, crosslinking agent, compatilizer are mixed for the first time, and mixing revolving speed for the first time is 900-1500rpm, are added
Vinal simultaneously mixes for second, and it is 100-150rpm that second, which mixes revolving speed,；
2) pass through double screw extruder melting, mixing, extrusion, cooling, dry, pelletizing, wherein the spiral shell of the double screw extruder
The area Tong Ge temperature is maintained between 175-260 DEG C.
9. preparation method according to claim 8, which is characterized in that the step 2) barrel includes that multistage different length is cut
The combination of chasing block；The combination of the shearing threaded block includes six sections of cutouts, every section of parameter are as follows: degree/5 one section: 44mm/45
Piece, degree/5/ piece 56mm/45, degree/5 piece two sections: 56mm/45, degree/5 piece 56mm/45, degree/5 piece three sections: 56mm/45,56mm/90
Degree/5, degree/5 piece four sections: 56mm/45, degree/5 piece five sections: 56mm/45, degree/5 piece six sections: 56mm/45, degree/5 56mm/45
Piece, degree/5 piece 56mm/90.
10. the described in any item PVA fiber reinforcement flame-retardant PBT-PET alloy composite materials of claim 1~7 are in manufacture electronics electricity
Application in terms of device assembly or automobile component or fan blade transmission parts.
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