摘要
利用毛细管流变仪研究了聚对苯二甲酸乙二酯(PET)-聚对苯二甲酸丙二酯(PTT)共聚酯(简称PETT)熔体的剪切流动性能,且与对应纯组分的流变性能进行了比较。结果表明:PETT熔体属于非牛顿流体,在相同温度下,PETT的剪切速率和黏度均小于纯PTT的值,且均随PTT链段含量的增加而减小。PETT的非牛顿指数和结构黏度指数均小于纯PTT。在相同剪切速率下,PETT的黏流活化能介于纯PET和纯PTT之间,且随PTT链段含量的增加而减小。
Rheological behavior of poly（ethylene-co-trimethylene terephthalate）copolymers was investigated systematically by means of a capillary rheometer and compared with rheological behavior of the corresponding homopolymer. Several factors,such as composition of the copolymers, shear rate and temperature influenced on apparent viscosity, non-Newtonian exponent were also discussed. The visco-flow activation energy and the non- Newtonican exponent of the copolymers and the homopolymers are calculated.
出处
《合成树脂及塑料》
EI
CAS
北大核心
2008年第1期66-69,共4页
China Synthetic Resin and Plastics
关键词
聚对苯二甲酸丙二酯
聚对苯二甲酸乙二酯
共聚酯
流变性能
黏流活化能
poly（trimethylene terephthalate）
poly（ethylene terephthalate）
gopolyester
rheological characteristics
visco-flow activation energy
