SINGLE-STEP ACYLATION OF POLYESTER TERMINALS BY ENZYMATIC RING-OPENING POLYMERIZATION OF 12-DODECANOLIDE IN THE PRESENCE OF ACYCLIC VINYL ESTERS
SINGLE-STEP ACYLATION OF POLYESTER TERMINALS BY ENZYMATIC RING-OPENING POLYMERIZATION OF 12-DODECANOLIDE IN THE PRESENCE OF ACYCLIC VINYL ESTERS
复制标题
无环乙烯基酯存在下通过 12-十二烷内酯酶促开环聚合对聚酯末端进行一步酰化
DOI：
10.1246/bcsj.70.1691
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Shiro Kobayashi
中科院分区：
文献类型：
--
作者：
H. Uyama;Hirofumi Kikuchi;Shiro Kobayashi
在脂肪酶催化下，以脂肪酶为催化剂，对13元内酯12-十二内酯(DDL)进行了酶促开环聚合反应。通过添加脂肪酸乙烯基酯在末端引入了酰基。考察了乙烯基酯的链长和浓度对聚合物引入比(官能度)和相对分子质量的影响。在适当的反应条件下，利用假单胞菌家族的脂肪酶实现了末端的定量酰化。分别以甲基丙烯酸乙烯酯和十一烯酸乙烯酯为引发剂，合成了甲基丙烯酰基型和ω-烯基型聚酯大单体。该工艺可推广到一步法合成聚酯遥螺体。在癸二酸二乙烯酯存在下的聚合产生了两端都具有羧酸基的遥螺旋聚合物。在使用脂肪酸乙酯或乙酸烷基酯作为添加剂时。
Enzymatic ring-opening polymerization of a 13-membered lactone, 12-dodecanolide (DDL), was performed in the presence of acyclic esters in bulk by using lipase catalyst. The acyl group was introduced at the terminal by adding a fatty acid vinyl ester. Effects of the chain length and concentration of the vinyl ester on the introduced ratio (functionality) and molecular weight of the polymer have been examined. The quantitative acylation of the terminal was achieved by using lipases derived from Pseudomonas family under appropriate reaction conditions. Methacryl- and ω-alkenyl-type polyester macromonomers were synthesized by the polymerization of DDL in the presence of vinyl methacrylate and vinyl 10-undecenoate, respectively. This process could be extended to single-step synthesis of polyester telechelics. The polymerization in the presence of divinyl sebacate produced a telechelic polymer having a carboxylic acid group at each end. In using a fatty acid ethyl ester or an acetic acid alkyl ester as additive...