摘要
研究了N,N二环己基2,6萘二酰胺(DC26NDCA)诱导等规聚丙烯(iPP)的结晶行为和微观形态。用WAXD分析DC26NDCA诱导iPP晶型的变化,用DSC研究DC26NDCA对iPP的结晶和熔融行为的影响,并用偏光显微镜(POM)原位观察DC26NDCA诱导iPP的结晶生长过程。结果表明DC26NDCA能有效地诱导iPP产生β晶型,β晶含量可达90%以上,使iPP非等温结晶过程的结晶温度(Tc)从110.2℃提高到126.6℃,而熔融温度由161.2℃下降至151.6℃;POM原位观察结果表明,β型成核剂DC26NDCA诱导iPP成核结晶的生长过程和方式符合附生结晶的规律。
The crystallization behavior and morphology of isotactic polypropylene (iPP) induced by DC26NDCA were studied by means of differential scanning calorimeter (DSC), wide angle X-ray diffraction (WAXD) and polarized light microscopy (PLM). The results show that DC26NDCA can induce a high level βform iPP, enhance the maximums of exothermic peaks(T_c) of non-isothermal crystallization from 110.2℃ to 126.6℃,and decrease melting temperature from 161.2℃ to 151.6℃. The dynamic growth processes, observed in-situ by PLM with a hot stage, reveal that the crystallization process and manner induced by β form nucleating agent accord to epitaxial crystallization mechanism.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2005年第2期329-333,共5页
Journal of Functional Polymers
基金
中国石化总公司科技部基础研究基金(X502006)
上海市科委科技发展基金(035211017)资助课题
