摘要
用差示扫描量热法测定了超微氧化镧填充聚丙烯恒温结晶过程中热焓的变化。结果表明,Avrami指数基本上不受氧化镧的影响,超微氧化镧的加入增加了晶核的数目并使结晶速度常数增加三倍左右,结晶活化能和晶格内垂直于分子链方向单位面积的自由能降低幅度并不大。
Isothermal crystallization kinetics of polypropylene (PP) and a PP composite with lan-thanum oxide has been studied by DSC. Although the crystallization rate increased by ca.three times in the composite, the Avrami index, the activation energy for crystallizationas well as the end surface frce energy were affected not markedly. The increase incrystallization rate for the composite is considered as a result of the increase in numberof nucleators owing to lanthanum oxide added.
出处
《应用化学》
CAS
CSCD
北大核心
1991年第3期1-4,共4页
Chinese Journal of Applied Chemistry
基金
中国科学院长春应化所稀土化学开放实验室资助项目
关键词
聚丙烯
结晶动力学
氧化镧
增强剂
polypropylene
lanthanum oxide
crystallization
kinetics
