【摘要】 共聚酯的流变性能的研究表明:共聚酯的熔体是典型的切力变稀假塑性流体。共聚酯熔体粘度随ＰＢＴ链段的引入及含量的增加而下降,同时也随温度的升高而降低。第三组份的引入和分子量的提高也使共聚酯的熔体粘度呈下降趋势。共聚酯熔体的粘流活化能均低于常规ＰＥＴ,而其非牛顿指数ｎ值均高于常规ＰＥＴ,且随温度的升高及第三组份的引入而增大。更多还原

【Abstract】 The rheological behaviour of copolyester indicates that it is a typical pseudoplastic fluids. Hie viscosity of copolyester melt decline with the introduction and increasing of FBT, at the same time, also decline with the increase of melt temperature and the introduction of the third monomer. The viscous flow activation energy of copolyester is lower than pure PET. The non - Newtonican index of copolyester melt was higher than pure PET, and increasing with the increase of temperature and the introduction of the third monomer.更多还原