摘要
用热失重(TGA)、X射线(WAXS)和偏光显微镜(PLM)研究了三种成核剂对聚对苯二甲酸乙二酯/聚萘二甲酸乙二醇酯(PET/PEN)共混体系的热降解行为、结晶行为和形态的影响。结果表明,成核剂的加入,加速了PET/PEN共混物的降解;且DBS[1,3:2,4-二(亚苄基)-D山梨醇]对PET/PEN共混物的影响最大,CaCO3对PET/PEN共混物的影响最小;含有DBS的PET/PEN共混物形成了环带球晶,CaCO3与PET/PEN共混物同时结晶,且成核剂的加入使晶体形态更完善。用差减微分法研究了PET/PEN/成核剂共混体系热降解动力学,计算得到了活化能(E)和反应级数(n),计算得到的活化能关系为EPET/PEN>EPET/PEN/DBS>EPET/PEN/CaCO3>EPET/PEN/SB。
The thermogravimetric analysis（TGA） has been used to study the thermo- degradation behavior, the results indicate that the adding of nucleating agent accelerates the degradation of PET/ PEN and the effect of DBS to PET/PEN is biggest, the effect of CaCO3 to PET/PEN is least. The activation energy （E） and reaction order （ n ） were calculated from TGA curves by differential subtract differential method, the E order of them is EPET/PEN 〉 EPET/PEN/DBS〉 EPET/PEN/CaCO3 〉 EPET/PEN/SB, and the reaction order of them is close; The crystal morphology of PET/PEN/nucleating agent blend system had been analyzed by polarizing microscope （PLM）, the results indicate that the four samples can crystallization, and the adding of nucleating agent reduces the size of crystal.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第6期121-124,共4页
Polymer Materials Science & Engineering
作者简介
联系人：李桂娟，主要从事聚合物结晶行为研究，E-mail：lgj@mail.dhu.edu.cn
