FRS-XRSA与SAXS研究硬弹性聚丙烯的结晶度、取向与超结构——Ⅱ.退火温度的影响  

STUDIES ON THE CRYSTALLINITY, ORIENTATION AND SUPER-STRUCTURE OF HEPP BY FRS-XRSA AND SAXS II. The Effect of Annealing Temperature

作　　者：胡家璁[1] 胡七一[1] 谷岩 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《高分子学报》1991年第2期153-161,共9页Acta Polymerica Sinica

摘　　要：本文是继应用WAXD与SAXS研究退火时间对HEPP结构影响后的第二部分工作,即退火温度的影响。结果指出:FRS-XRSA是研究择优取向聚合物结晶与取向的合理方法;HEPP的X_c^x与L_(kkl)随T_(an)存在着熔融-结晶-再熔融及趋于平稳的过程,当t_(an)=30min,T_(an)≥140℃是较佳结晶条件;与前人工作不同,HEPP中的片晶似呈扭曲状,且随T_(an)增加,扭曲片晶向伸展片晶转变,当T_(an)≥140℃,伸展取向渐趋稳定;SAXS结果指出,d随T_(an)线性增加,d_c在T_(an)从110°—120℃出现剧变增厚,d_0的变化与晶粒的熔融和片晶的增厚相对应,片晶层是由二层晶粒堆砌而成。T_(an)与t_(an)相比,两者对HEPP的结构都有明显的影响。The present work is to investigate the effect of annealing temperature Tan on microst-ructure and superstructure of HEPP fibers by FRS-XRSA and SAXS. The results show that: FRS-XRSA is a new reasonable method for studying the preferred orientation polymers, It was found that as Tan increases, the melting-crystallization-remelting-processes approach a dynamic equilibrium and the twisted lamellae, which is different from previous literatures, works, extends gradually; long periodicity increases linearly and the lamellae thickness increases suddenly from Tan= 110 to 120℃ The superatructure of lamellae consists of two-layer crystallites. Tan effects on the microstructure and superstructure of HEPP fibers, are greater than lan effects.

关 键 词：聚丙烯 结晶度 FRS-XRSA SAXS HEPP 

分 类 号：TQ632.12[化学工程—精细化工]