有机氨钙催化聚合脂肪族环酯  

Ring-opening Polymerization of Aliphatic Cyclic Esters by Using Organic Amino Calcium Catalyst

作　　者：朴龙海[1] 张昕照[1] 陈学思[1] 邓明霄[1] 姜连升[1] 景遐斌[1] 

机构地区：[1]中国科学院长春应用化学研究所,高分子物理和化学国家重点实验室,长春130022

出　　处：《高等学校化学学报》2003年第2期346-349,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :5 99830 0 4和 5 0 2 730 38)资助

摘　　要：分别用经环氧丙烷和环氧丙烷 /乙腈处理的氨钙催化剂催化聚合了 ε-己内酯和 L-丙交酯 .研究了催化剂浓度、聚合时间、真空度、聚合温度和陈化温度等对聚合收率和聚合物粘均分子量的影响 .结果表明 ,有机氨钙催化剂对 ε-己内酯和 L-丙交酯的开环聚合有较高的催化活性 ,在较低的温度下和较短的时间内 ,即可获得较高的转化率和较高的分子量 ,而且具有一些“准活性聚合”的特点 ,分子量在一定范围内可控 .陈化处理和乙腈的加入可以大大提高聚 ε-己内酯的分子量 ,最大分子量达到 2 7× 1 0 4.ε-Caprolactone and L-lactide were ring-opening polymerized by using calcium catalysts treated with propylene oxide and acetonitrile/(propylene oxide). The influences of catalyst concentration and aging temperature, polymerization time and temperature on molecular weight of the polymers were studied. It was shown that this catalyst exhibited a high reactivity and some 'quasi-living-polymerization' character and the molecular weight of the polyester could be controlled by adjusting the mass ratio of monomer to catalyst. Aging treatment of the catalyst and employment of the second organic modifier, acetonitrile, resulted in a higher molecular weight of the polymers. The highest molecular weight obtained was 270 000.

关 键 词：催化聚合 脂肪族环酯 有机氨钙 催化剂 己内酯 丙交酯 开环聚合 

分 类 号：O633.14[理学—高分子化学] O643.36[理学—化学]