高温均相法二醋酸纤维素酯的研究——结构及其溶液微胶粒尺寸

本文用 DSC、WAX 衍射和光电分光光度技术及粘度法研究了高温(100～150℃)均相法二醋酸纤维素酯(DCA)的结构及其微胶粒子尺寸。结果表明,DCA 溶液凝胶由于合成过程的因素失控致使反应不均匀性而产生的该法 DCA 溶液微胶粒子尺寸远小于光波波长,具有很好的可纺性能。

STUDY ON CELLULOSE DIACETATE PREPARED HOMOGENEOUSLY AT HIGH TEMPERATURE——THE STRUCTURES AND THE SOLUTION MICROGEL PARTICLES SIZE

The structures and the solution microgel particles size of cellulose diacetate prepared homogeneously at high temperature(100—150℃) have been investigated by means of DSC,WAX-ray diffractogram and viscosimetry.It was found that any factor which during the preparation of DCA might make the product more heterogeneous may be a source of false viscosity,Controled homogeneous synthesis at 100—150℃ has derived a DCA which has good spinnability due to compromise between high degree of polymerzation and uniform substitution.