聚乳酸/聚酯共混体系熔体流变性能研究  

Investigation of Melt Rheological Properties of PET and PLA Blends

作　　者：于翔[1] 李静静[1] 王延伟[1] 

机构地区：[1]河南工程学院材料与化学工程学院,郑州450007

出　　处：《材料导报》2012年第22期59-63,70,共6页Materials Reports

基　　金：河南省科技厅重点攻关项目(082102280002)

摘　　要：对聚酯与聚乳酸共混体系的相容性及熔体流变性能进行了研究。首先制备不同比例的PET/PLA共混体系,并利用示差扫描量热仪(DSC)研究共混体系的相容性,发现m(PLA)/m(PET)在20%以内时相容性较好。而后利用毛细管流变仪研究了不同温度、不同剪切速率下共混体系的熔体流变性能,发现随PLA含量的增大,非牛顿指数先增加后减小,且在m(PLA)/m(PET)=10%时出现极大值;黏流活化能则随PLA含量的增大而降低;另外当m(PLA)/m(PET)=10%时的共混体系可纺性较好。The compatibility and melt rheological properties of PET and PLA blends were studied. In particu- lar, the compatibility of PET and PLA was fully investigated using DSC, and the melt rheological properties was ana- lyzed by capillary rheometer at different temperatures and shear rates. The results show that firstly, PET and PLA possess compatibility to a certain extent, especially as the rn（PLA）/m（PET） is lower than 20%. Secondly, the non- Newtonian index first increases with the increasing PLA content and then decreases, and the maximum appears when m（PLA）/rn（PET）- 10%. The viscous flow activation energy decreases with the increasing PLA content in the blends. Thirdly, when m（PLA）/m（PET）=10%, the blends have better spinnability.

关 键 词：聚对苯二甲酸乙二醇酯 聚乳酸 熔体流变性 非牛顿指数 黏流活化能 结构黏度指数 

分 类 号：O063[理学]