Lipase-catalyzed synthesis of aliphatic polyesters by polycondensation of dicarboxylic acids and glycols in solvent-free system
Lipase-catalyzed synthesis of aliphatic polyesters by polycondensation of dicarboxylic acids and glycols in solvent-free system
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DOI：
10.1295/polymj.32.440
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发表时间：
2000-01-01
期刊：
影响因子：
2.8
通讯作者：
Kobayashi, S
中科院分区：
文献类型：
--
作者：
Uyama, H;Inada, K;Kobayashi, S
在无溶剂体系中，用酶法将二羧酸和乙二醇合成了脂肪族聚酯。南极假丝酵母脂肪酶在温和的反应条件下催化聚合，尽管单体和催化剂的混合物均为非均相。系统地考察了聚合条件对癸二酸与1,4-丁二醇聚合反应的影响。单体亚甲基链长对聚合物收率和分子量影响较大。通过减压反应得到了分子量大于1 × 10(4)的聚合物。少量佐剂的加入使聚合物从固体单体中分离出来。
Aliphatic polyesters have been synthesized by enzymatic polymerization of dicarboxylic acids and glycols in a solvent-free system. Candida antarctica lipase catalyzed the polymerization under mild reaction conditions, de spite the heterogeneous mixture of the monomers and catalyst. Effects of the polymerization conditions were systematically investigated in the polymerization of sebacic acid and 1,4-butanediol. Methylene chain length of the monomers greatly affected the polymer yield and molecular weight. The polymer with molecular weight of more than 1x10(4) was obtained by the reaction under reduced pressure. The addition of a small amount of adjuvant afforded the polymer from the solid monomers.