悬浮聚合法制备聚乙醇酸的工艺  

Research on the suspension polymerization of polyglycolic acid

作　　者：陆卫良[1] 崔爱军[1] 王泽云[1] 田俊凯[1] 陈群[1] 何明阳[1] 

机构地区：[1]常州大学江苏省精细石油化工重点实验室,常州213164

出　　处：《化工进展》2013年第3期652-656,共5页Chemical Industry and Engineering Progress

摘　　要：利用悬浮聚合的方法,选用甲基硅油作为体系的分散介质,MOA-3作为分散剂,乙醇酸为单体,辛酸亚锡为催化剂,合成出了特性黏度高达0.845 dL/g的聚乙醇酸(PGA),采用红外、核磁、DSC、XRD等方法表征了聚乙醇酸的结构和性质。通过一系列单因素实验探讨了聚合温度、反应时间、催化剂用量等对聚乙醇酸特性黏度的影响规律。经过正交实验得出各因素对特性黏度影响的大小,并得出最佳的制备工艺为:温度194℃,反应时间113 h,催化剂用量0.02%。Ploy（glycolic acid） （PGA） with a relatively high molecular weight of 0.845 dt＇g-I was prepared by suspension polymerization with methyl silicon as a disperse medium, glycolic acid as monomer, MOA-3 as dispersing agent, and Stannous octoate as catalyst. The structure and properties of the PGA were analyzed by NMR, IR, DSC, etc. The influence of synthesis conditions on inherent viscosity was tested by a series of single factor experiments. Orthogonal test was set to explore the influence of several factors and optimal process condition was obtained as follows： reaction temperature 194℃, reaction time 113 h, amount of catalyst 0.02%.

关 键 词：乙醇酸 聚乙醇酸 悬浮聚合 生物降解 高分子材料 

分 类 号：TQ316.4[化学工程—高聚物工业]