摘要
研究了稀土三元催化剂(三氯乙酸稀土配合物/二乙基锌/甘油)催化下的正辛酸缩水甘油酯、CO2和环氧丙烷三元共聚合。红外光谱、核磁共振和DSC结果表明,所获得的聚合物是一种新型的三元共聚物。随着反应单体中正辛酸缩水甘油酯比例的增加,所得聚合物在20℃下的断裂伸长率由二氧化碳-环氧丙烷共聚物的31.0%增大至二氧化碳-正辛酸缩水甘油酯共聚物的983.9%,相应的玻璃化转变温度由39.6℃降低至-12.3℃。所得三元共聚物中长碳链侧基单元含量为5.6%时,其断裂伸长率就已经达到481.1%,而拉伸强度仍然维持在24.9MPa的较高水平。
Terpolymerization of glycidyl octanoate, carbon dioxide with propylene oxide was carried out using ternary rare-earth-metal coordination catalyst. IR, NMR and DSC results confirm the target polymer was a novel terpolymer. The glass transition temperature of the resoluting terpolymer decreased with increasing flexible glycidyl octanoate units, from 39.6 ℃ of carbon dioxide-propylene oxide copolymer to - 12.30 ℃ of carbon dioxide-glycidyl octanoate copolymer, whereas the elongation at break at 20℃ increased from 31.0% to 983.9%. Introduction of 5.6% glycidyl octanoate unit into the terpolymer may raise the elongation at break to 481.1%, whereas the tensile strength maintains as high as 24. 9 MPa.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第7期770-774,共5页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金重点资助项目(20634040)
关键词
CO2
环氧丙烷
正辛酸缩水甘油酯
稀土三元催化剂
三元共聚
carbon dioxide, propylene oxide, glycidyl octanoate, ternary rare-earth-metal coordination catalyst,terpolymerization
