Lipase-Catalyzed Polycondensation of Dicarboxylic Acid-Divinyl Esters and Glycols to Aliphatic Polyesters

摘要

Lipase-catlayzed polymerization of dicarboxylic acid-divinyl esters with glycols has been performed. The vinyl esters used were divinyl adipate and divinyl sebcate.Lipases derived from Candida antarctia, Mucor miehei, Pseudomonas cepacia, and P. fluorescnes showed high catlytic activity toward the present polymerization. Effects of solent, reaction temperature, and enzyme amount were systematically investigated. A combination of divinyl adipate, 1,4-butanediol, and P. cepacia lipase afforded the highest molecular weight (2.1*10~4). The yield of the polymer from divinyl sebacate was higher than that from divinyl adipate, whereas the opposite tendency was obsered in the polymer molcelar weight. Methylene chain length of #alpha#, #omega#-alkylene glycol also affected the polymerization behavior. The enzymatic polymerization of divinyl sebacate with cis-2-butene-1,4-diol and 2-btuene-1,4-diol resulted in the polymer containing undaturated group in the polymer backbone.