摘要
将改性的二氧化钛/氧化锌(TiO2/ZnO)超细复合粉体应用于聚对苯二甲酸乙二醇酯(PET)的共混改性,研究了改性PET的流变性能及其纤维的力学性能。结果表明:改性PET共混物为非牛顿假塑性流体,其表观粘度随剪切速率的增大而减小;随着超细粉体含量增大,改性PET共混物非牛顿流动指数下降,熔体粘度对温度的敏感性增大,流变性能改善;当超细粉体质量分数为5%时,改性PET共混物粘流活化能可达81.5 kJ/mol;随着超细复合粉体添加量增大,改性PET纤维断裂强度下降。
Titanium dioxide/zinc oxide （TiO2/ZnO） superfine composite powder was used in the blend modification of polyeth- ylene terephthalate （PET） . The rheological behavior of modified PET and the mechanical properties of the fiber thereof were studied. The results showed that the modified PET blend is non-Newtonian pseudoplastic fluid. The apparent viscosity was de- creased with the increase of shearing rate. The non-Newtonian index of the blend was decreased, the temperature sensitivity of melt viscosity was increased and the rheological behavior was improved while increasing the content of superfine powder. The vis- cous flow activation energy of the modified PET blend could be 81.5 kJ/mol when the content of superfine composite powder was 5% by mass fraction. The breaking strength of the modified PET fiber was decreased while increasing the content of superfine powder.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2009年第4期1-3,共3页
China Synthetic Fiber Industry
基金
辽宁省攻关项目(20062114)
关键词
聚对苯二甲酸乙二酯
二氧化钛
氧化锌
超细粉体
流变性能
力学性能
polyethylene terephthalate
titanium dioxide
zinc oxide
superfine powder
rheological behavior
mechanical property
