Study on the enzymatic degradation of PBS and its alcohol acid modified copolymer
Study on the enzymatic degradation of PBS and its alcohol acid modified copolymer
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DOI：
10.1007/s10532-011-9492-y
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发表时间：
2012-02-01
期刊：
影响因子：
3.6
通讯作者：
Qiu, Jian-hui
中科院分区：
文献类型：
--
作者：
Ding, Mingliang;Zhang, Min;Qiu, Jian-hui
研究了聚丁二酸丁二醇酯（PBS）、聚丁二酸丁二醇酯-co-1，4-环己烷二甲醇（PBS/CHDM）和聚丁二酸丁二醇酯-co-二甘醇酸（PBS/DGA）在四氢呋喃（THF）和甲苯混合溶剂中的酶促水解降解。以脂肪酶为催化剂降解分子量在10万以上的聚合物，产物分子量从几百到几千不等。所有产物的热分解温度均低于250 A ℃。PBS/CHDM和PBS/DGA的降解产物均显示出约85和99 A ℃的两个熔点。采用质谱法（MS）获得从产物中提取的低聚物的分子量，其被证明是分子量小于1，000的低聚酯。首次在PBS/CHDM降解产物中发现了丁二醇（BDO）单体。
Enzymatic hydrolytic degradation of polybutylene succinate (PBS), poly(polybutylenesuccinate-co-1,4-cyclohexane dimethanol) (PBS/CHDM) and poly(polybutylene succinate-co-diglycolic acid) (PBS/DGA) in mixed solvent of tetrahydrofuran (THF) and toluene was examined. Lipase was used as catalyst to degrade polymers with molecular weight of more than 100,000, and the molecular weight of products ranged from hundreds to thousands. Thermal decomposition temperatures of all products were below 250A degrees C. The degradation products of both PBS/CHDM and PBS/DGA showed two melting points at about 85 and 99A degrees C. Mass spectrometry (MS) was employed to obtain the molecular weight of oligomers extracted from the products, which proved to be low-polyesters with the molecular weight of less 1,000. The butanediol (BDO) monomer was found in PBS/CHDM degradation product for the first time.