摘要
以乙酸铋[Bi(OAc)3]为催化剂进行乙交酯的开环聚合,研究了催化剂用量、聚合温度、聚合时间对聚乙交酯(PGA)特性黏度的影响,得出了较优工艺条件为:乙酸铋用量为300μg/g,聚合温度为200℃,聚合时间为2.0 h,合成了特性黏度高达0.884 dL/g、重均相对分子质量为1.12×105的高分子量PGA。比较了乙酸铋和辛酸亚锡的催化性能,结果表明,乙酸铋的催化活性略高于辛酸亚锡。比较了分别以乙酸铋和辛酸亚锡为催化剂合成的PGA的毒性,发现前者的毒性明显低于后者。用X射线衍射(XRD)、差示扫描量热(DSC)和热重分析(TGA)进行了性能表征。
Bismuth （Ⅲ） acetate [Bi（OAc）3] was used as catalyst for the ring-opening polymerization of glycolide. The effects of catalyst content,polymerization temperature,polymerization time were investigated. The optimal condition was obtained as follows：Bismuth （Ⅲ） acetate 300 μg/g, polymerization temperature 200 ℃,polymerization time 2h. The intrinsic viscosity of PGA could reach 0.884dL/g and average molecular weight could reach 1.12×105. The catalytic properties of Bi（OAc）3 and Sn（Oct）2 were compared. The catalytic activity of Bi（OAc）3 was slightly higher than Sn（Oct）2. The toxicity of PGA synthesized by Bi（OAc）3 and Sn（Oct）2 as the catalyst respectively was compared , and the former was lower than the latter obviously. The properties of PGA were characterized by X-ray diffraction （XRD） , differential scanning calormetry （DSC） and thermogravimetric analysis （TGA）.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2014年第2期395-399,共5页
Chemical Industry and Engineering Progress
关键词
乙酸铋
乙交酯
聚乙交酯
开环聚合
生物可降解材料
bismuth （Ⅲ） acetate
glycolide
polyglycolide
ring-opening polymerization
biodegradable materials
作者简介
鲁康伟（1988-），男，硕士研究生，从事催化反应及其应用研究。E-maillkw5155@163．com。
联系人：陈群，研究员。E-mail13906123032@CCZH．edu．cn。
