PBS基共聚酯P(BS-co-PeD)和P(BS-co-GA)的降解差异性研究  

Study on the degradation differences of PBS-based copolymers P(BS-co-PeD)and P(BS-co-GA)

作　　者：张敏[1,2] 马晓宁 李成涛[2] 赵冬 ZHANG Min;MA Xiao-ning;LI Cheng-tao;ZHAO Dong(Key Laboratory of Auxiliary Chemistry&Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science&Technology,Xi′an 710021,China;School of Enviromental Science and Engineering,Shaanxi University of Science&Technology,Xi′an 710021,China)

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]陕西科技大学环境科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报》2018年第2期63-67,92,共6页Journal of Shaanxi University of Science & Technology

基　　金：教育部高等学校博士学科点专项科研基金项目(20126125110001);陕西科技大学博士科研启动基金项目(BJ09-08)

摘　　要：通过熔融缩聚法合成了PBS基共聚酯,即聚(丁二酸丁二醇-co-丁二酸戊二醇酯)(PBS-co-PeD)和聚(丁二酸丁二醇-co-戊二酸丁二醇酯)(PBS-co-GA).其热性能,结晶性能采用热重分析仪(TGA),示差扫描量热仪(DSC)和广角X射线衍射光谱仪(WAXD)测试.以南极假丝酵母脂肪酶B(Candida antarcticalipase B,CALB)为酶催化剂,在水相体系中研究了(PBS-co-PeD)和(PBS-co-GA)的降解差异性.研究结果表明,两种共聚酯的热稳定性优良,热分解温度均在300℃以上,但结晶度和玻璃化转变温度(Tg)均下降,24h后(PBS-co-30PeD)和(PBS-co-30GA)均可达到完全降解,5d后(PBS-co-20PeD)和(PBS-co-20GA)的质量损失率分别为85%和93%,表明(PBS-co-GA)的降解性能优于(PBS-co-PeD).A novel series of PBS-based copolyester was successfully synthesized by melt polycondensation,that is,poly(butylene succinate-co-pentanediol succinate)P(BS-co-PeD)and poly(butylene succinate-co-butylene glutaric acid)(PBS-co-GA).The thermal properties and crystallinity were analyzed by thermogravimetric analyzer(TGA),differential scanning calorimetry(DSC)and wide angle X-ray diffraction(WAXD).In the aqueous system,Candida antarctica lipase B was used as the enzyme catalyst to study the different degradability of P(BS-co-PeD)and(PBS-co-GA).The results show that both copolyesters have excellent thermal stability,the decomposition temperature are above 300℃,however the crystallinity and the glass transition temperature(Tg)decrease,meanwhile,(PBS-co-30PeD)and(PBS-co-30GA)can achieve complete degradation after 24 h,the mass loss rates of(PBS-co-20PeD)and(PBS-co-20GA)are 85%and 93%respectively in 5 days,illustrating that(PBS-co-GA)has better degradation than(PBS-co-PeD).

关 键 词：聚丁二酸丁二醇酯 南极假丝酵母脂肪酶B 酶降解 降解差异性 

分 类 号：O631[理学—高分子化学]