PLA/PBAT薄膜的光氧老化行为  

The photooxidation aging behavior of PLA/PBAT film

作　　者：司鹏[1] 邹俊[1] 张宜辉[1] 应纪飞 王方方[1] 齐迎珍 

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212003

出　　处：《功能材料》2016年第7期7114-7120,共7页Journal of Functional Materials

基　　金：江苏省科技支撑(工业)资助项目(SBE2014001336);江苏省产学研前瞻资助项目(BY2012177);江苏省高校产学研资助项目(JHB2012-41)

摘　　要：采用差热扫描量热仪(DSC)、动态热机械分析仪(DMA)、傅里叶红外光谱仪(FT-IR)和万能拉伸试验机研究了在紫外光照射过程中聚乳酸/己二酸-对苯二甲酸-丁二酯共聚物(PLA/PBAT)薄膜的结晶性能、动态热机械性能、不同官能团含量以及力学性能。实验结果表明,经紫外光照射后,PLA/PBAT薄膜的结晶能力变强,结晶度增大;储能模量减小,玻璃化转变温度升高,链段运动多样性增加,链段松弛变得容易;CH—含量减少,同时C=O和—OH含量增大;力学性能降低,且取向对于力学性能的降低幅度有重要影响。最后作者还给出了PLA/PBAT薄膜在紫外光照射过程中的降解机理。The crystallization property,dynamic thermo mechanical property,different functional group content and mechanical property of the polylactide/poly（butyleneadipate-co-terephthalate）（PLA/PBAT）film in the process of UV irradiation were investigated by differential thermal scanning calorimeter（DSC）,dynamic thermal mechanical analyzer（DMA）,Fourier transform infrared spectrometer（FT-IR）and universal tensile testing machine.The results showed that,during UV illmination,the crystallization ability of PLA/PBAT film enhanced and its degree of crystallinity raised simultaneously;the storage modulus continuously reduced while its glass transition temperature gradually became high,at the same time,the chain segment movement was more diverse and its chain segment relaxation became easy;the content of CH— decreasesed meanwhile the content of C=O and—OH increased;its mechanical properties got worse,and orientation had a significant influence on the fall range.At last,the degradation mechanism of PLA/PBAT film during UV irradiation was listed as well.

关 键 词：聚乳酸 己二酸-对苯二甲酸-丁二酯共聚物 光氧老化 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]