张军,沈希军,张建,冯连芳

• 1:浙江大学化学工程与生物工程学系化学工程联合国家重点实验室
• 2:中国石油化工股份公司仪征化纤股份有限公司

摘要(Abstract)：

与固相缩聚工业生产用常规粒径聚酯相比,粉状聚酯的传质和反应均可得到增强。实验研究了不同粒径粉状聚酯(0.2～0.8 mm)在氮气氛围中的固相增黏规律,并采用模型方法对缩聚反应与降解行为进行了分析。结果表明粉状聚酯的固相缩聚反应是缩聚与降解的竞争过程,反应初期缩聚反应占主导地位,特性黏度随反应不断增加,后期降解反应占主导地位,特性黏度减小,存在一个特性黏度的最大值;粒径对固相缩聚反应影响明显,粒径的减小同时强化了缩聚与降解反应,缩聚与降解反应速率常数均增大,缩聚反应的活化能降低,降解反应活化能增大。

关键词(KeyWords)： 聚酯;粉体;固相缩聚;降解

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张军,沈希军,张建,冯连芳

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