化学反应平衡对聚酯扩链增粘的影响  

Influence of reaction equilibrium on chain extending of poly(ethylene terephthalate)

作　　者：孟庆华[1] 陈林[1] 黄德音[1] 陈宏军[2] 

机构地区：[1]上海交通大学化学化工学院,上海200240 [2]合成纤维国家工程研究中心,上海200540

出　　处：《合成纤维工业》2002年第2期5-7,共3页China Synthetic Fiber Industry

摘　　要：用化学反应平衡的方法对开环扩链型扩链剂的增粘作用进行理论分析 ,推导出扩链剂用量与聚酯特性粘数变化的关系 ,发现反应平衡常数直接影响扩链效率 ;分析了实现扩链的必要条件和扩链剂的最佳投料量 ;利用推导出的理论关系计算出常见扩链剂参与扩链反应的平衡常数。The theoretic analysis of the chain extending of PET was carried out based on reaction equilibrium. The relationship between the amount of chain extender and intrinsic viscosity was deduced. It was found that equilibrium constants had a direct effect on chain extending efficiency. The optimal conditions for chain extension and the optimal amount of chain extender were obtained through analysis. The equilibrium constants of some chain extending reactions were calculated for normal chain extenders from the deduced relationship.

关 键 词：化学反应平衡 聚酯 扩链增粘 影响 扩链反应 特性粘数 扩链方程 

分 类 号：TQ316.4[化学工程—高聚物工业]