裂解甲基化研究丙交酯-己内酯共聚物结构及稳定性  

Study on Structure and Thermal Stability of Lactide-Caprolactone Copolymer by Simultaneous Methylation PyGC/MS

作　　者：胡定煜[1] 罗爱芹[1] 傅若农[1] 王身国[2] 

机构地区：[1]北京理工大学化工与材料学院,北京100081 [2]中国科学院化学研究所,北京100080

出　　处：《北京理工大学学报》2000年第6期773-776,共4页Transactions of Beijing Institute of Technology

基　　金：国家重点基础研究发展规划资助项目

摘　　要：利用样品裂解后小分子产物相对量随裂解温度变化的 F- t曲线 ,分析丙交酯 -己内酯共聚物的热稳定性变化 ,用裂解甲基化方法结合质谱对共聚物的裂解产物进行鉴定 .结果表明 ,共聚物在 350℃开始裂解 ,约在 4 50℃裂解完全 ,热稳定性比其均聚体差 .在组成上以丙交酯链段为主 .The pyrolyzates of lactide caprolactone copolymer(PLC) were quantitatively analysed and F t curves were drawn from pyrolysis gas chromatography (PyGC) data. The pyrolyzates were identified by simultaneous methylation pyrolysis gas chromatography/mass spectrometry. Results showed that PLC copolymer become decomposed at 350 ℃ and the complete decomposition temperature is about 450 ℃. The thermal stability of the copolymer is weaker than its homopolymers and its maximum decomposition temperature ranged between 410 ℃ and 500 ℃. The PLC sample is mostly the block copolymer and the lactide chains parts are the mainly components.

关 键 词：裂解气相色谱 裂解甲基化 丙交酯-己内酯共聚物 

分 类 号：O631[理学—高分子化学] O657.71[理学—化学]