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.
出处
《北京理工大学学报》
EI
CAS
CSCD
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
关键词
裂解气相色谱
裂解甲基化
丙交酯-己内酯共聚物
pyrolysis gas chromatography
simultaneous methylation pyrolysis
lactide caprolactone copolymer
thermal stability
