| 热塑性弹性体热寿命和热降解动力学研究 |
| Thermal lifetime and degradation kinetics of TPEs |
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| DOI： |
| 中文关键词: 热塑性弹性体 热重分析法 热寿命 活化能 |
| 英文关键词: thermoplastic elastomer thermogravimetry thermal lifetime activation energy |
| 基金项目:河南省科技攻关资助项目（0424270033） |
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| 中文摘要: |
| 用热重分析法研究苯乙烯-二烯烃-苯乙烯三嵌段共聚物(SIS，SBS和SI/BS)的热降解动力学及热寿命。结果表明，SIS，SBS和SI/BS在氮气气氛下的起始热降解温度分别为499.8，630.2和582.9 K，SBS的热稳定性高于SIS和SI/BS；SIS的热降解属扩散过程控制机理，SBS和SI/BS属随机成核和随后生长过程控制机理，SIS，SBS和SI/BS的热降解反应活化能分别为196.8，298.3和349.9 kJ·mol-1；SIS，SI/BS和SBS的热寿命依次延长。 |
| 英文摘要: |
| The thermal lifetime and degradation kinetics of styrene-diene-styrene triblock copolymers(SIS,SBS and SI/BS) were investigated by thermogravimetry.The results showed that the initial thermal degradation temperatures of SIS,SBS and SI/BS at nitrogen atmosphere were 499.8,630.2 and 582.9 K respectively indicating that the thermal stability of SBS was better than those of SIS and SI/BS;the diffusion process was predominant during the thermal degradation of SIS,the random nucleation and then growth process was predominant during the thermal degradations of SBS and SI/BS,and the activation energies of thermal degradations for SIS,SBS and SI/BS were 196.8,298.3 and 349.9 kJ·mol-1 respectively;and the order of thermal lifetimes was SIS＞SI/BS＞SBS. |
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