以碳酸酯键为酶基质的PBS制备与性能  

Preparation and Properties of Poly( butylene-succinate) Containing Enzyme Matrix Carbonate Ester

作　　者：荆晶晶 张敏[1] 张若琳[1] 王慧[1] 邱建辉 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]日本秋田县立大学

出　　处：《塑料》2015年第1期47-50,90,共5页Plastics

基　　金：高等学校博士学科点专项科研基金(20126125110001)

摘　　要：作为酶促降解的新基质,采用环状三亚甲基碳酸酯(TMC)开环参与PBS共聚,得到了PBS分子主链中含有碳酸酯基的PBS基共聚酯P(BS-co-TMC)。采用1H-NMR表征了新型共聚物的化学结构,并对共聚物的结晶性能、热性能和力学性能进行了研究。结果表明:1H-NMR证明了得到的产物是预期的P(BS-co-TMC);WXRD表明其晶型结构和PBS相似,但随着TMC含量的添加,晶体尺寸稍有增大,结晶度降低,θg和θd都有所降低;但θd-5%仍在300℃以上,说明仍具有良好的热稳定性;共聚物的断裂伸长率明显提高,柔顺性增加。相比PBS,南极假丝酵母脂肪酶N435对P(BS-co-TMC)的降解作用明显增强,对于改善PBS的降解性具有一定的意义。The novel PBS-based copolyester P （BS-co-TMC） was obtained by ring-opening copolymerization of cyclic trimethylene carbonate. The carbonate-terminated group contained in P （BS-co-TMC） was a new matrix of enzymatic degradation. The desired products P （BS-co-TMC） were characterized by IH_NMR. They were also characterized from the molecular,thermal and mechanical point of view. The results showed that the desired products P（BS-co-TMC） were achieved by ~ H-NMR. WXRD measurements indicated that their crystal structure remained the same with PBS. With the count of TMC increased,the size of crystallites increased, while the crystallinity, 0~ and 0d of the copolymers decreased. The thermal decomposition temperature kept above 300 ~C with the 5% mass loss. It indicated that the copolymers had good thermal stability. Elongation rate of copolymers was obviously improved. Compared with PBS,the degradation rate of P（BS-co-TMC） in lipase N435 was improved. It had certain significance to speed up PBS-based copolymers＇ degradation.

关 键 词：生物降解聚酯 聚丁二酸丁二醇酯 共聚作用 三亚甲基碳酸酯 酶降解 

分 类 号：TQ323.43[化学工程—合成树脂塑料工业]