聚乙交酯及聚乙丙交酯的流变性能研究  

Study on rheological behavior of polyglycollide and poly(glycolide lactide)

作　　者：徐纪刚[1] 高建辉[1] 陈功林[1] 刘伯林[1] 赵庆章[1] 

机构地区：[1]中国纺织科学研究院,北京100025

出　　处：《合成纤维工业》2008年第3期15-17,共3页China Synthetic Fiber Industry

基　　金：北京市自然科学基金(2062023)

摘　　要：采用毛细管流变仪研究了聚乙交酯(PGA)和聚乙丙交酯(PGLA)的流变性能,分析了剪切速率、温度对聚合物流体流动曲线、非牛顿指数、流动活化能等的影响。结果表明:PGA和PGLA都属于非牛顿型假塑性流体,随着温度的提高,PGA和PGLA的表观粘度降低,非牛顿指数逐渐增大。PGA和PGLA的流动活化能均随着剪切速率的增加呈下降趋势,PGLA流体对剪切速率更敏感,而PGA流体对温度更敏感。The rheological behavior of polyglycollide （PGA） and poly （ glycolide lactide） PGLA was studied with a capillary rheometer. The effects of the shearing rate and temperature on the flow curves, non-Newtonian index and flow activation energy of the polymers fluid were analyzed. The results showed that PGA and PGLA belonged to non-Newtonian pseudoplastic fluid; the apparent viscosity of PGA and PGLA was decreased and the non-Newtonian index was increased gradually while elevating the temperature; the flow activation energy showed a downward tendency while increasing the shearing rate; and PGLA fluid was more sensitive to the shearing rate when PGA fluid was more sensitive to temperature.

关 键 词：聚乙交酯 聚乙丙交酯 流变性能 非牛顿指数 流动活化能 

分 类 号：TQ340.1[化学工程—化纤工业]