摘要
本文系统研究了新型再生纤维素纤维NEWCELL(NEW)和普通粘胶法再生纤维素纤维RAYON(RAY)的动态粘弹性能 ,结果表明 ,在 - 15 0℃～ +35 0℃温度范围内 ,再生纤维素发生了复杂的松弛和转变 ,并对这些松弛峰的分子运动机理进行了探讨。这些松弛和转变表明再生纤维素的结构非常复杂 ,而产生这一复杂性的根本原因是纤维素中大量的复杂的氢键作用及其运动。从各转变的特征值来分析 ,NEW的超分子结构具有较高的有序性 ,分子间和分子内氢键作用较大 ,而RAY的正好相反 ,且在其晶区内次晶较多 ,缺陷较多 ,故宏观力学性能上的NEW的模量大大高于RAY的。本文从粘弹性角度对氢键进行了讨论 ,首次提出了氢键破碎区 ,同时首次发现了纤维素在更低温度下的γ松弛。
The dynamic viscoelasticities of two regenerated cellulose fibers were investigated in this paper.The results showed that there were several relaxations in the dynamic viscoelastic spectra of regenerated cellulose,and the mechanism of various relaxations was discussed.From the view point of dynamic viscoelasticity,the superstructure of NEW fiber regenerated form aqueous NaOH solution has greater degree of order and intra-and inter-molecular hydrogen bond than that of RAYON,one of conventional viscose fibers,It is the firast time that the mechanism of hydrogen bond breaking region was put forward.In addititon,the γ relaxation was also discovered the first time.
出处
《化学与粘合》
CAS
2000年第1期1-4,共4页
Chemistry and Adhesion
基金
中日合作研究项目
关键词
再生纤维素
纤维
动态粘弹性
分子结构
氢键
regenerated cellulose
fiber
dynamic viscoelasticity
superstructure
relaxation
hydrogen bond
