熔融缩聚/固相缩聚合成聚草酸乙二醇酯及其性能表征  

Melt Polycondensation/Solid Phase Condensation Polymerization into Polyethylene Oxalate and Its Performance Characterization

作　　者：田俊凯 靳琳琳 杨卫东 高军 范昌海 崔爱军[2] 何明阳[2] 陈群[2] TIAN Jun-kai;JIN Lin-lin;YANG Wei-dong;GAO Jun;FAN Chang-hai;CUI Ai-jun;HE Ming-yang;CHEN Qun(Zhejiang Sateillite Energy Co.,LTD,Jiaxing 314200,China;Key Lab of Fine Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]浙江卫星能源有限公司,嘉兴314200 [2]常州大学江苏省精细石油化工重点实验室,常州213164

出　　处：《高分子通报》2020年第7期38-45,共8页Polymer Bulletin

摘　　要：为解决直接聚合聚草酸乙二醇酯粘度低,利用熔融缩聚和固相缩聚联用的工艺合成较高粘度的聚酯。聚草酸乙二醇酯在170℃,氯化亚锡催化剂直接熔融缩聚,125±2℃进行固相缩聚40h,特性粘度增加到0.236dl·g^-1。通过红外和核磁进行表征分子结构;利用DSC表征固相缩聚比直接聚合结晶温度高10℃,达到137℃。固相缩聚后聚酯粘度增加,结晶性能改变,结晶温度增加。in order to solve the low viscosity of direct polymerization polyoxalate glycol ester,polyester with high viscosity was synthesized by means of melt condensation polymerization and solid-phase condensation polymerization.Polyoxalate glycol ester was directly fused and condensed at 170℃with stannum chloride catalyst.Solid phase polycondensation was performed at 125±2℃for 40 h.The characteristic viscosity increased to 0.236 dl·g^-1.The molecular structure was characterized by ir and NMR.DSC was used to characterize the crystallization temperature of solid phase polycondensation 10℃higher than that of direct polymerization,reaching 137℃.After solid phase polycondensation,the viscosity increases,the crystallization property changes,and the crystallization temperature increases.

关 键 词：聚草酸乙二醇酯 草酸 固相缩聚 降解 

分 类 号：O631.5[理学—高分子化学]