摘要
本文用密度法,DSC、X射线衍射研究了PET纤维的纺速对结晶度和其他结构参数的影响,发现结晶度和某些结构参数在纺速3300m/min下出现不连续变化,预示该中速纺的纤维容易诱发结晶。通过分析该中速纺纤维在低于T_g的不同温度下于定长(受约束)和不定长(可自由松弛)下热处理后各结构参数的相互关系,探讨了其结晶机制,说明其容易诱发结晶的原因是中介态含量接近饱和状态。
Density, DSC and X-ray diffraction investigations are made on PET fiber -with reference to the effect of spinning speed on crystallinity and other structural parameters. The crystallinity and some structural parameter at spinning speed of 3300m/min appears a discontinuous change, indicating fiber spun at that medium speed is easy to crystallize. The mechanism of crystallization is approached by analysing- the interrelation between structural parameters of that fiber after heat treatment at different temperature below Tg aud of definite (limited) or indefinite (free relaxable) length, it explains that the reason of easy crystallization is the near saturated state of mesophase content.
出处
《合成纤维》
CAS
1989年第1期1-7,共7页
Synthetic Fiber in China
基金
中科院科学基金
