摘要
以乳酸为原料、锌酸亚锡为催化剂,按二者质量比1∶0.008投料,在170℃、0.09 MPa下反应8 h,直接熔融缩聚生成聚乳酸均聚物,测得其羟值(以KOH计)为112 mg/g。聚乳酸均聚物与IPDI反应,当—OH/—NCO摩尔比为1.5时,176℃、0.09 MPa条件下,反应13 min得到PLA的rη最大。将PLA分别与几种PEG共聚合成PLEGs,对聚合物进行了表征。
Using lactic acid as material and Sn（Oct）2 as catalyst with their mass ratio of 1 ： 0.008, the homopolymeric poly（lactic acid） is directly synthesized via the melt copolycondensation under the condition of temperature of 170℃ and pressure of 0.09 MPa for 8 h,by which the hydroxyl value is 112 mgKOH/g. The homopolymeric poly（lactic acid） is reacted with IPDI with different molar ratio, and when it is 1.5 and reacting at 176℃ under 0.09 MPa for 13 min, the ηr of polymer can reach maximum value. The prepared PLA is reacted with PEG-400, PEG-600, PEG-800, PEG-4000, PEG-6000 and PEG- 10000 to produce a series of new PLEGs. All of the above polymers are characterized also.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2008年第11期52-54,共3页
Modern Chemical Industry
基金
陕西省自然科学基金资助项目(2004B13)
陕西省咸阳市科技计划资助项目(XK07011-2)
关键词
聚乳酸-聚乙二醇
聚乙二醇
直接熔融缩聚
polylactic acid-polyethylene glycol
polyethylene glycol
direct melt polycondensation
