CN110041665A - Heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind and preparation method thereof - Google Patents
Heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind and preparation method thereof Download PDFInfo
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- CN110041665A CN110041665A CN201910248191.6A CN201910248191A CN110041665A CN 110041665 A CN110041665 A CN 110041665A CN 201910248191 A CN201910248191 A CN 201910248191A CN 110041665 A CN110041665 A CN 110041665A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/324—Alkali metal phosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
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Abstract
The invention discloses a kind of heat-resisting highly crystalline REINFORCED PET/LCP alloy materials and preparation method thereof, and the alloy material includes following component according to parts by weight: 40 ~ 50 parts of Polyethylene terephthalate (PET), 20 ~ 30 parts of liquid crystal polymer (LCP), 30 ~ 40 parts of glass fibre, 0.1 ~ 0.5 part of ester exchange inhibitor, 0.2 ~ 0.5 part of coupling agent, 0.2 ~ 2 part of nucleating agent, 0.2 ~ 0.5 part of antioxidant, 0.2 ~ 0.6 part of lubricant, 0.5 ~ 3 part of compatible toughening agents.There is heat-resisting height using the alloy material that preparation method of the invention obtains, the features such as advantages of good crystallization, the heat-resistant high-performance engineering plastics used for heat-resisting, high rigidity requirement, the demanding electric appliance stressed member of dimensionally stable, structural member, accessory, there is good electric property simultaneously, using safety and environmental protection raw material, promoted by crystalline rate of the LCP to PBT, at the same improve the rigidity of material with it is heat-resisting.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to a kind of heat-resisting highly crystalline REINFORCED PET/LCP alloy
Material and preparation method thereof.
Background technique
PET(Polyethylene terephthalate) it is one of most common engineering thermoplastic material, it is those semi-crystalline materials, is had
Extraordinary chemical stability, mechanical strength, electrical insulation characteristics and thermal stability, and hygroscopicity is very weak.
But PET crystallization rate is slow, is easy warpage, use scope relative narrower, while the notch impact strength of PBT is low, at
Type shrinking percentage is big, is difficult meet the needs of people.
LCP(liquid crystal polymer) it is a kind of novel high molecular material, liquid crystal liquid crystal property, this kind of material are generally presented in molten state
Material has excellent heat resistance and moulding processability.Based on melt polycondensation, all aromatic LCP is aided with solid polymerization more
High molecular weight products are made, non-all aromatic LCP plastic material produces production frequently with a step or two step melt polymerizations for phase polycondensation
Product.The technology that high molecular weight LCP is produced in continuous fusion polycondensation is developed, and tensile strength and bending modulus can be more than to grow up
Various thermoplastic engineering plastics, mechanical performance, dimensional stability, optical property, electrical property, chemical resistance, anti-flammability,
Processability is good, heat-resist, and thermal expansion coefficient is lower.
LCP characteristic is as follows: a, LCP have self-reinforcing, have the characteristics that abnormal regular fibrous structure, because without enhancing
Liquid crystal plastics can meet or exceed generic engineering plastics with after tens percent glass fiber reinforcements mechanical strength and
The level of its modulus；It is farther far more than Other Engineering plastics if enhanced with glass fibre, carbon fiber etc.；B, liquid crystal polymer
Also there is excellent thermal stability, heat resistance and chemical resistance, to creep feature, liquid crystal material existing for most of plastics
Can be ignored, and it is wear-resisting, anti-attrition is excellent；C, the against weather, radiation resistance of LCP are good, have excellent resistance
Combustion property, can knock down the flame and do not continue to burn, combustion rating reach UL94V-0 grade it is horizontal；D, LCP has excellent
Electrical insulation capability, dielectric strength is higher than common engineering plastics, and arc resistance is good；It is being used continuously 200-300 DEG C of temperature,
Electrical property is unaffected, and interruption is using temperature up to 316 DEG C or so；E, LCP has corrosion resistance outstanding, and LCP product exists
Concentration, which is 90% acid, and concentration is will not suffer erosion in the presence of 50% alkali, for industrial solvent, fuel oil, detergent and hot water,
It will not be dissolved after contact, stress cracking will not be caused.
Therefore, if blend alloy material is made in PET and LCP, obtained REINFORCED PET/LCP alloy material cost is opposite
Enhance LCP, REINFORCED PET, cost performance with higher, rigidity is high, adapts to more harsh environment, lower cost can be in portion
LCP is substituted under time-sharing environment to use.
Summary of the invention
In view of the deficienciess of the prior art, the object of the invention is that provide a kind of heat-resisting highly crystalline REINFORCED PET/
LCP alloy material and preparation method thereof, alloy material obtained not only have many advantages, such as excellent mechanical property, weather-proof, simultaneously
With heat-resisting high, dimensionally stable feature.
To achieve the goals above, the technical solution adopted by the present invention is that it is such: the heat-resisting highly crystalline REINFORCED PET of one kind/
LCP alloy material includes following component according to parts by weight:
40 ~ 50 parts of Polyethylene terephthalate (PET)
20 ~ 30 parts of liquid crystal polymer (LCP)
30 ~ 40 parts of glass fibre
0.1 ~ 0.5 part of ester exchange inhibitor
0.2 ~ 0.5 part of coupling agent
0.2 ~ 2 part of nucleating agent
0.2 ~ 0.5 part of antioxidant
0.2 ~ 0.6 part of lubricant
0.5 ~ 3 part of compatible toughening agents.
As a preferred embodiment, the intrinsic viscosity of the Polyethylene terephthalate (PET) is 0.87.
As a preferred embodiment, the liquid crystal polymer (LCP) is Liquid crystalline copolyester polymer.
As a preferred embodiment, the glass fibre is the dedicated short glass fiber of polyesters.
As a preferred embodiment, the ester exchange inhibitor be one of triphenyl phosphite, disodium hydrogen phosphate or
Two kinds.
As a preferred embodiment, the coupling agent is γ-glycidoxypropyl trimethoxy silane or gamma-amino third
Ethyl triethoxy silicane alkane or γ-chloropropyltrimethoxy silane.
As a preferred embodiment, the nucleating agent is Brueggemann product.
As a preferred embodiment, the compatible toughening agents be Methyl Methacrylate-Butadiene-Styrene Copolymer or
Ethylene-acrylate-maleic anhydride terpolymer or ethylene-acrylate-glycidyl ester ternary polymerization
Object or 3-Methoxy-3-methyl-1-butanol.
The present invention also provides a kind of preparation methods of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, including such as
Lower step:
(1) prepare raw material: according to parts by weight including 40 ~ 50 parts of Polyethylene terephthalate (PET), liquid crystal polymer
(LCP) 20 ~ 30 parts, 30 ~ 40 parts of glass fibre, 0.1 ~ 0.5 part of ester exchange inhibitor, 0.2 ~ 0.5 part of coupling agent, nucleating agent 0.2 ~
2 parts, 0.2 ~ 0.5 part of antioxidant, 0.2 ~ 0.6 part of lubricant, 0.5 ~ 3 part of compatible toughening agents；
(2) PET is dried in advance, 120 degree of drying temperature, drying time 5 hours；LCP is dried in advance, drying temperature 180 degree, is dried
The dry 8 hours time；
(3) raw material is sequentially then added to blending, total 10min is mixed in high-speed mixer, is then sent to twin-screw extrusion
Machine melting is kneaded, squeezes out；Be equipped with ten temperature in double screw extruder and set area: the processing temperature in an area is 245 DEG C, 2nd area
Processing temperature be 255 DEG C, the processing temperature in 3rd area is 265 DEG C, and the processing temperature in 4th area is 275 DEG C, the processing temperature in 5th area
It is 285 DEG C, the processing temperature in 6th area is 290 DEG C, and the processing temperature in 7th area is 290 DEG C, and the processing temperature in 8th area is 280 DEG C, nine
275 DEG C of the processing temperature in area, the processing temperature in tenth area are 270 DEG C；Wherein engine speed is 450-550 revs/min；
(4) raw material cooling, pelletizing, drying after squeezing out, is finally packed to get alloy material.
As a preferred embodiment, wherein glass fibre is that twin-screw extrusion is added by laterally measuring forced-feeding device
In machine.
Compared with prior art, beneficial effects of the present invention:
(1) alloy material of the invention is using addition coupling agent γ-glycidoxypropyl trimethoxy silane, gamma-amino third
Ethyl triethoxy silicane alkane improves compatibility and crystallinity；
(2) alloy material of the invention is using ester exchange reaction is prevented in triphenyl phosphite, disodium hydrogen phosphate, to maintain material
Expect basic performance；
(3) alloy material of the invention uses Methyl Methacrylate-Butadiene-Styrene Copolymer or ethylene-acrylate-
Maleic anhydride terpolymer or ethylene-acrylate-glycidyl ester terpolymer or 3- methoxyl group-
3- methyl-1-butanol reaches material compatibility height as toughener, and internal stress is small, and toughness height is to improve product use scope；
(4) alloy material of the invention improves PET crystallization rate using the nucleating agent of Brueggemann product, reduces stress and sticks up
It is bent.
Specific embodiment
The invention will be further described combined with specific embodiments below.Following embodiment is only used for clearly illustrating
Technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1:
A kind of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, includes following component according to parts by weight:
50 parts of Polyethylene terephthalate (PET)
20 parts of liquid crystal polymer (LCP)
30 parts of glass fibre
0.3 part of ester exchange inhibitor
0.3 part of coupling agent
1 part of nucleating agent
0.2 part of antioxidant
0.5 part of lubricant
2 parts of compatible toughening agents.
Specifically, the intrinsic viscosity of the Polyethylene terephthalate (PET) is 0.87.
Specifically, the liquid crystal polymer (LCP) is Liquid crystalline copolyester polymer.
Specifically, the glass fibre is the dedicated short glass fiber of polyesters.
Specifically, the ester exchange inhibitor is one or both of triphenyl phosphite, disodium hydrogen phosphate.Further
, the ester exchange inhibitor is SA-PGP-B ester exchange inhibitor.
Specifically, the coupling agent is γ-glycidoxypropyl trimethoxy silane or gamma-amino propyl triethoxy
Silane or γ-chloropropyltrimethoxy silane.
Specifically, the nucleating agent is Brueggemann product.Further, the nucleating agent is Brueggemann product
P250。
Specifically, the compatible toughening agents are Methyl Methacrylate-Butadiene-Styrene Copolymer or ethylene-propylene
Acid esters-maleic anhydride terpolymer or ethylene-acrylate-glycidyl ester terpolymer or 3- first
Oxygroup -3- methyl-1-butanol.
Specifically, the antioxidant is the product of Ciba.
The present invention also provides a kind of preparation methods of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, including such as
Lower step:
(1) prepare raw material: according to parts by weight including 50 parts of Polyethylene terephthalate (PET), liquid crystal polymer (LCP)
20 parts, 30 parts of glass fibre, 0.3 part of ester exchange inhibitor, 0.35 part of coupling agent, 1 part of nucleating agent, 0.2 part of antioxidant, lubricant
0.5 part, 2 parts of compatible toughening agents；
(2) PET is dried in advance, 120 degree of drying temperature, drying time 5 hours；LCP is dried in advance, drying temperature 180 degree, is dried
The dry 8 hours time；
(3) raw material is sequentially then added to blending, total 10min is mixed in high-speed mixer, is then sent to twin-screw extrusion
Machine melting is kneaded, squeezes out；Be equipped with ten temperature in double screw extruder and set area: the processing temperature in an area is 245 DEG C, 2nd area
Processing temperature be 255 DEG C, the processing temperature in 3rd area is 265 DEG C, and the processing temperature in 4th area is 275 DEG C, the processing temperature in 5th area
It is 285 DEG C, the processing temperature in 6th area is 290 DEG C, and the processing temperature in 7th area is 290 DEG C, and the processing temperature in 8th area is 280 DEG C, nine
275 DEG C of the processing temperature in area, the processing temperature in tenth area are 270 DEG C；Wherein engine speed is 450-550 revs/min；
(4) raw material cooling, pelletizing, drying after squeezing out, is finally packed to get alloy material.
Specifically, wherein glass fibre is added in double screw extruder by laterally measuring forced-feeding device.
Embodiment 2:
The present embodiment the difference from embodiment 1 is that, a kind of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, in parts by weight
Meter includes following component:
45 parts of Polyethylene terephthalate (PET)
25 parts of liquid crystal polymer (LCP)
30 parts of glass fibre
0.4 part of ester exchange inhibitor
0.3 part of coupling agent
1 part of nucleating agent
0.2 part of antioxidant
0.5 part of lubricant
2 parts of compatible toughening agents.
The present invention also provides a kind of preparation methods of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, including such as
Lower step:
(1) prepare raw material: according to parts by weight including 45 parts of Polyethylene terephthalate (PET), liquid crystal polymer (LCP)
25 parts, 30 parts of glass fibre, 0.4 part of ester exchange inhibitor, 0.3 part of coupling agent, 1 part of nucleating agent, 0.2 part of antioxidant, lubricant
0.5 part, 2 parts of compatible toughening agents；
(2) PET is dried in advance, 120 degree of drying temperature, drying time 5 hours；LCP is dried in advance, drying temperature 180 degree, is dried
The dry 8 hours time；
(3) raw material is sequentially then added to blending, total 10min is mixed in high-speed mixer, is then sent to twin-screw extrusion
Machine melting is kneaded, squeezes out；Be equipped with ten temperature in double screw extruder and set area: the processing temperature in an area is 245 DEG C, 2nd area
Processing temperature be 255 DEG C, the processing temperature in 3rd area is 265 DEG C, and the processing temperature in 4th area is 275 DEG C, the processing temperature in 5th area
It is 285 DEG C, the processing temperature in 6th area is 290 DEG C, and the processing temperature in 7th area is 290 DEG C, and the processing temperature in 8th area is 280 DEG C, nine
275 DEG C of the processing temperature in area, the processing temperature in tenth area are 270 DEG C；Wherein engine speed is 450-550 revs/min；
(4) raw material cooling, pelletizing, drying after squeezing out, is finally packed to get alloy material.
Embodiment 3:
The present embodiment the difference from embodiment 1 is that, a kind of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, in parts by weight
Meter includes following component:
40 parts of Polyethylene terephthalate (PET)
30 parts of liquid crystal polymer (LCP)
30 parts of glass fibre
0.5 part of ester exchange inhibitor
0.3 part of coupling agent
1 part of nucleating agent
0.2 part of antioxidant
0.5 part of lubricant
2 parts of compatible toughening agents.
The present invention also provides a kind of preparation methods of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, including such as
Lower step:
(1) prepare raw material: according to parts by weight including 40 parts of Polyethylene terephthalate (PET), liquid crystal polymer (LCP)
30 parts, 30 parts of glass fibre, 0.5 part of ester exchange inhibitor, 0.3 part of coupling agent, 1 part of nucleating agent, 0.2 part of antioxidant, lubricant
0.5 part, 2 parts of compatible toughening agents；
(2) PET is dried in advance, 120 degree of drying temperature, drying time 5 hours；LCP is dried in advance, drying temperature 180 degree, is dried
The dry 8 hours time；
(3) raw material is sequentially then added to blending, total 10min is mixed in high-speed mixer, is then sent to twin-screw extrusion
Machine melting is kneaded, squeezes out；Be equipped with ten temperature in double screw extruder and set area: the processing temperature in an area is 245 DEG C, 2nd area
Processing temperature be 255 DEG C, the processing temperature in 3rd area is 265 DEG C, and the processing temperature in 4th area is 275 DEG C, the processing temperature in 5th area
It is 285 DEG C, the processing temperature in 6th area is 290 DEG C, and the processing temperature in 7th area is 290 DEG C, and the processing temperature in 8th area is 280 DEG C, nine
275 DEG C of the processing temperature in area, the processing temperature in tenth area are 270 DEG C；Wherein engine speed is 450-550 revs/min；
(4) raw material cooling, pelletizing, drying after squeezing out, is finally packed to get alloy material.
1-3 properties of product of the embodiment of the present invention are detected, testing result is as shown in table 1.
Table 1
In conclusion there are heat-resisting height, the features such as advantages of good crystallization, for resistance to using the alloy material that preparation method of the invention obtains
The heat-resistant high-performance engineering plastics that heat, high rigidity requirement, the demanding electric appliance stressed member of dimensionally stable, structural member, accessory use,
There is good electric property simultaneously, using safety and environmental protection raw material, promoted by crystalline rate of the LCP to PBT, mentioned simultaneously
The rigidity of high material with it is heat-resisting, being widely used in the fields such as household electrical appliances, machinery has the requirements such as force structure, heat-resisting, dimensionally stable
Product.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of heat-resisting highly crystalline REINFORCED PET/LCP alloy material, which is characterized in that according to parts by weight include following component:
40 ~ 50 parts of Polyethylene terephthalate (PET)
20 ~ 30 parts of liquid crystal polymer (LCP)
30 ~ 40 parts of glass fibre
0.1 ~ 0.5 part of ester exchange inhibitor
0.2 ~ 0.5 part of coupling agent
0.2 ~ 2 part of nucleating agent
0.2 ~ 0.5 part of antioxidant
0.2 ~ 0.6 part of lubricant
0.5 ~ 3 part of compatible toughening agents.
2. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: described poly-
The intrinsic viscosity of terephthalic acid (TPA) hexylene glycol ester (PET) is 0.87.
3. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: the liquid
Crystalline polymer (LCP) is Liquid crystalline copolyester polymer.
4. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: the glass
Glass fiber is the dedicated short glass fiber of polyesters.
5. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: the ester
Exchanger inhibitor is one or both of triphenyl phosphite, disodium hydrogen phosphate.
6. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: the idol
Connection agent is γ-glycidoxypropyl trimethoxy silane or γ aminopropyltriethoxy silane or γ-chloro propyl front three
Oxysilane.
7. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: it is described at
Core agent is Brueggemann product.
8. the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 1, it is characterised in that: the phase
Holding toughener is Methyl Methacrylate-Butadiene-Styrene Copolymer or ethylene-acrylate-maleic anhydride tercopolymer copolymerization
Object or ethylene-acrylate-glycidyl ester terpolymer or 3-Methoxy-3-methyl-1-butanol.
9. the preparation method of heat-resisting highly crystalline REINFORCED PET/LCP alloy material described according to claim 1 ~ any one of 8, special
Sign is, includes the following steps:
(1) prepare raw material: according to parts by weight including 40 ~ 50 parts of Polyethylene terephthalate (PET), liquid crystal polymer
(LCP) 20 ~ 30 parts, 30 ~ 40 parts of glass fibre, 0.1 ~ 0.5 part of ester exchange inhibitor, 0.2 ~ 0.5 part of coupling agent, nucleating agent 0.2 ~
2 parts, 0.2 ~ 0.5 part of antioxidant, 0.2 ~ 0.6 part of lubricant, 0.5 ~ 3 part of compatible toughening agents；
(2) PET is dried in advance, 120 degree of drying temperature, drying time 5 hours；LCP is dried in advance, drying temperature 180 degree, is dried
The dry 8 hours time；
(3) raw material is sequentially then added to blending, total 10min is mixed in high-speed mixer, is then sent to twin-screw extrusion
Machine melting is kneaded, squeezes out；Be equipped with ten temperature in double screw extruder and set area: the processing temperature in an area is 245 DEG C, 2nd area
Processing temperature be 255 DEG C, the processing temperature in 3rd area is 265 DEG C, and the processing temperature in 4th area is 275 DEG C, the processing temperature in 5th area
It is 285 DEG C, the processing temperature in 6th area is 290 DEG C, and the processing temperature in 7th area is 290 DEG C, and the processing temperature in 8th area is 280 DEG C, nine
275 DEG C of the processing temperature in area, the processing temperature in tenth area are 270 DEG C；Wherein engine speed is 450-550 revs/min；
(4) raw material cooling, pelletizing, drying after squeezing out, is finally packed to get alloy material.
10. the preparation method of the heat-resisting highly crystalline REINFORCED PET/LCP alloy material of one kind according to claim 9, feature
Be: wherein glass fibre is added in double screw extruder by laterally measuring forced-feeding device.
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| TWI704042B (en) * | 2019-08-20 | 2020-09-11 | 南亞塑膠工業股份有限公司 | Polyester film and method for producing the same |
| US11707876B2 (en) | 2019-08-20 | 2023-07-25 | Nan Ya Plastics Corporation | Polyester film and method for producing the same |
| CN110724367A (en) * | 2019-11-13 | 2020-01-24 | 上海普利特化工新材料有限公司 | Liquid crystal polymer/PET in-situ composite polyester material capable of being extruded into film and preparation method thereof |
| CN110724367B (en) * | 2019-11-13 | 2022-04-08 | 上海普利特化工新材料有限公司 | Liquid crystal polymer/PET in-situ composite polyester material capable of being extruded into film and preparation method thereof |
| CN114479377A (en) * | 2022-02-11 | 2022-05-13 | 广东优巨先进新材料股份有限公司 | Polyester alloy material and preparation method and application thereof |
| CN114479377B (en) * | 2022-02-11 | 2023-10-31 | 广东优巨先进新材料股份有限公司 | Polyester alloy material and preparation method and application thereof |
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