摘要
通过双螺杆熔融共混法制备PET/凹凸棒土(AT)复合材料,用示差扫描量热计(DSC)研究了PET、PET/AT复合材料的结晶行为。非等温分析结果表明:在PET中引入AT提高了PET基体结晶温度和PET结晶速率。PET及PET/AT复合材料的结晶温度随降温速率的增大而移向低温,半结晶时间及结晶度随降温速率的增大而减小。基于Avrami方程的动力学分析表明:PET/AT复合材料的非等温结晶过程是带有异相成核的三维增长过程。
PET/Attapulgite（AT） composite had been prepared by the melt compounding approach using a brabender twin- screw extruder. The crystallization behavior of PET and PET/AT composite was studied by DSC. The results showed that, at a given colling rate, crystallization temperature of PET/AT composite was higher than that of PET, and crystallization rate of PET/AT composite was faster than that of PET. For both PET and PET/AT composite, with increasing of cooling rate, crystallization temperature moved to lower temperature, meanwhile, the value of half-time and crystallization degree decreased. The kinetics analysis based on Avrami equation suggested that the nonisothermal crystallization of PET/AT composite corresponded to tridimensional growth with heterogenous nucleation.
出处
《塑料》
CAS
CSCD
北大核心
2009年第2期77-80,共4页
Plastics
关键词
PET
AT
复合材料
结晶动力学
异相成核
PET
AT
composites
crystallization kinetics
heterogenous nucleation
