摘要
分别用Avrami方程和Hoffman结晶理论研究了马来酸酐接枝聚丙烯(MAH-g-PP)增容的动态固化聚丙烯(PP)/环氧树脂(EP)共混物中PP等温结晶动力学。实验结果表明,动态固化PP/MAH-g-PP/EP共混物中环氧颗粒可作为PP的成核剂,能显著促进PP的结晶。根据Avrami方程,动态固化PP/MAH-g-PP/EP共混物中PP的结晶速率常数K(T)明显大于纯PP的K(T)。依据Hoffman理论研究动态固化PP/MAH-g-PP/EP共混物结晶热动力学,动态固化PP/MAH-g-PP/EP共混物折叠链表面自由能(σe)明显小于PP折叠链表面自由能(σe)。
The isothermal crystallization of dynamically cured polypropylene （PP）/epoxy （EP） blends compatibilized with maleic anhydride grafted PP （MAH-g-PP） was studied by Avrami equation and Hoffman crystallization theory, respectively. The results show that cured epoxy particles act as effective nucleating agents, accelerating the crystallization of PP component in dynamically cured PP/MAH-g-PP/EP blends. Based on Avrami equation, the kinetic constant K（T） of PP crystallization in the PP/epoxy blends is higher than that of PP. The crystallization thermodynamics of dynamically cured/MAH-g-PP/EP blends were studied according to the Hoffman theory. The chain folding energy （σe） for PP crystallization in dynamically cured PP/epoxy blends is lower than that of PP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第9期57-60,共4页
Polymer Materials Science & Engineering
关键词
聚丙烯
环氧树脂
动态固化
等温结晶动力学
polypropylene
epoxy resin
dynamical cure
isothermal crystallization kinetics
