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水溶性聚酯的热降解动力学研究
KINETICS OF THERMAL DEGRADATION FOR WATER SOLUBLE POLYESTER
【摘要】 水溶性聚酯的热降解动力学研究应宗荣李瑞霞吴大诚(四川联合大学轻纺学院成都610065)关键词水溶性聚酯,热降解,动力学,活化能高聚物的热稳定性直接影响高聚物的应用和加工成型.高聚物在高温时易发生热降解,导致分子链断裂,分子量降低,性能劣化.研究...
【Abstract】 The thermal stability and kinetics of thermal degradation for water soluble polyester (WSP), which is prepared by the copolycondensation of dimethyl terephthalate (DMT), dimethyl isophthalate (DMI) and 5 sodium sulfonate isophthalate methyl (SIPM) with ethylene glycol (EG), were studied using the conventional static and dynamic thermogravimetric techniques in a flowing nitrogen atmosphere. The thermal degradation rate parameter k and apprarent activation energy E were calculated using first order reaction intregal methold and Ozawa method respectively. It was found that the thermal degradation of WSP at 290℃ belongs to first order reaction, its rate parameter of thermal degradation k is 12.84×10 -6 s -1 ,and average apparent activation energy E is 156.8kJ/mol.
【Key words】 Water soluble polyester; Thermal degradation; Kinetics; Activation energy;
- 【文献出处】 高分子学报 ,ACTA POLYMERICA SINICA , 编辑部邮箱 ,1997年06期
- 【分类号】O623.14
- 【被引频次】15
- 【下载频次】255