Shanghai Daoqin Plastics Co., Ltd.

due to PET comprehensive property can comparison excellent 良, it by widely used in film, combined formed fiber and engineering plastics and other field/area. is due to PET 玻璃化 temperature degree, melting point comparison high, in usually using/adopting temperature degree lower, crystallization speed degree relatively slow resin versus for separation quality increase large reduce, crystallization structure non-uniform, products surface coarse 糙, gloss degree 差, impact tough property good, retardant 碍 PET resin in certain application.

（PET and PBT chemical structure 式）

therefore, add fast PET crystallization speed degree, toughened modified, from improvement processing properties formed PET application key/critical. 自70 year 代以, 人们尝试 through very more for PET进行 modified, generally can using/adopting blending, reinforcement, filling and other methods its material mechanical properties and processing process property can, make resin heat resistant property, resistant product property, weather resistance, rigid property and electrical properties to improvement. generally can using/adopting add crystallization promote agent and nucleating agent and other 手段进行改进, add anti agent, flame retardant and agent can 改进PET self-extinguishing property and flame retardant property.

1, PET filling modified
filling modified is utilizing and polymer property full different machine separation comprehensive improves material property can most 直接, most has methods 之一, is modified polymer/macromolecule material most methods 之一.

2, nano pellets modified PET
currently, utilizing nano pellets modified PET composite/compounding material research already non formed 熟. Ke and other use viscous modified PET, using/adopting polymerization methods to PET／clay nano composite/compounding material. research table/sheet 明, viscous add make composite/compounding material crystallization speed rate ratio pure PET improves 约三倍. viscous content is 5wt％时, composite/compounding material heat deflection temperature (HDT) ratio pure PET improve/increase 约20℃~50℃; composite/compounding material modulus and PET versus ratio improves 约2倍.

3, glass fiber modified PET
and nano pellets versus ratio, micron grade glass fiber (GF)拥 has advantages, by used for filling modified polymer/macromolecule material.

4, PET blending modified
will 包括PET in inner types and types above polymer according to ratio/proportion in temperature degree and 剪切应 force and other conditions lower, through melt blending methods formed tool has new property can polymer alloy or blending material. polymer versus property is this type of polymer made key/critical in.

if need make types or types above versus polymer to separation versus or versus 容, can using/adopting reaction extrusion technology, versus property technology, polymer separation between versus function technology and polymer technology and other, currently application most more is versus property technology.

5, polyolefin modified PET
PET and PE in chemical structure upper tool has obvious 差异, tool has versus property. 由二者 simple binary blending research can 见, need through polymer blending modified improve/increase PET impact property can, need through increase 容手段 improve/increase versus property. in HDPE and PET blending system in, add 入EVA and EAA system impact strong/high degree has improve/increase.

PET and PP blending, formed alloy meanwhile tool has long 处, make property can to improvement, 例如, PET can make PP heat resistant property improve/increase, PP can make PET for water separation property reduce. in has compatibilizer function lower PET and PP blending, versus interface combined very low, force property can very 差.

very more for versus blending system versus property a large amount of research. 结果显示, add 入5% SEBS can to improvement impact property can and stability dispersion versus function, is also 远远不 and function SEBS以SEBS-g-GMA is increase agent, PET is versus blending material tool has very high rigid property and tough property.

PET/PS belongs to versus system, must add compatibilizer can to blending versus 容 目. Maa and Chang will styrene and acrylic sink marks ester copolymer P（S-GMA） as is reaction type compatibilizer add 入PET/PS blending system in, to interface combined comparison good PET/PS/P(S-GMA) blending system, make force property can to improve/increase.

6, polyester modified PET
PBT is upper 世纪70 year speed development 起 一 types new type engineering plastics, it force property can excellent 于PET, but also also has very good tough property, can 够模塑 molding, is it heat resistant property and flow property has PET good, but also price relatively high.

两者 chemical structure versus 似, therefore it versus property very good, blending rear can long short, made impact strong/high degree high but also cost low product. it blending material also has very good strong/high degree, rigid property, chemical stability property, heat stabilized property and wear resistance, but also products also has good gloss. Teijin company 报道, in blending material in add 入0.5% slip powder as is nucleating agent, blending material impact resistant property can good, molding shrinkage low.

北京 chemical industry research polymer/macromolecule application development formed 功PET/PBT engineering plastics alloy series, has reinforcement, flame retardant, filling and other type type, property can excellent 良, already through in and technology 鉴定, its main/primary property can already to or ultra- 国 outer 文献报道 同 type product water 平.

PC force property can very good, tough property good, 玻璃化转变 temperature degree high, is it flow property and resistant aging property relatively 差. PET and PC blending can improve/increase impact strong/high degree. blending material already in outer industrial production, in automotive parts upper has application. 席世平 and other [9] for blending system research table/sheet 明, PE-g-MA can improvement blending system versus property, improvement PET, PC versus distribution, improve/increase PET crystallization speed rate and can force, from improve/increase blending material property can.

8, elastomer toughened modified PET

ABS is currently application most polymer 之一, it not only tool has good tough property, but also also has ratio HIPS more excellent comprehensive property can. will PET and ABS blending can make PET impact strong/high degree has improve/increase. Cook research PET/ABS blending system property can and structure between 关系.

through DMTA and DSC research table/sheet 明二者 is versus 容, blending material in has versus, 以SAN and type PET versus is 主. SEM table/sheet 明, 两 区域缺口断面都 performance versus large property deformation, 说明 两 versus for toughened 做出 一定 贡献.

随 blending material in PET content increase more, blending material system flexural strength, modulus and fracture strong/high degree versus improve/increase. Cook in research in also blending material in PET versus for separation quality for processing temperature degree separation 敏感, PET链 hydrolysis and hot and ABS in catalytic agent related. PET versus for separation quality reduce 会导致 impact property can and elongation large loss 失, for modulus and flexural strength has effect/influence.