以丙三醇、1,6-己二醇和己二酸为共聚单体,以固定化脂肪酶Novozym435为催化剂,尝试先进行共聚单体的预聚后在有机介质中进行酶催化直接缩聚反应合成脂肪族超支化聚酯的新途径,考察了反应介质和反应温度对酶催化缩聚反应的影响,并采用凝胶渗透色谱和核磁共振确定产物的分子量和结构.结果表明,将单体的预聚与酶催化缩聚反应相结合,可在温和的反应条件下合成超支化脂肪族聚酯;在所考察的有机介质中以甲苯的效果最佳,且在70℃时脂肪酶Novozym435催化活性最高,所得产物的支化度为0.27,重均分子量为1.31×104.
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