引用本文:
袁开军, 江治, 李疏芬, 周允基. 聚氨酯弹性体的热分解动力学研究[J]. 应用化学,
2005, 22(8): 861-864.
Citation: YUAN Kai-Jun, JIANG Zhi, LI Shu-Fen, CHOW W K. Kinetics of Thermal Degradation of Polyurethane Elastomers[J]. Chinese Journal of Applied Chemistry, 2005, 22(8): 861-864.

Citation: YUAN Kai-Jun, JIANG Zhi, LI Shu-Fen, CHOW W K. Kinetics of Thermal Degradation of Polyurethane Elastomers[J]. Chinese Journal of Applied Chemistry, 2005, 22(8): 861-864.

聚氨酯弹性体的热分解动力学研究
English
Kinetics of Thermal Degradation of Polyurethane Elastomers
Abstract:
The thermal degradations of polyether-polyurethane and polyester-polyurethane in air and nitrogen atmospheres were investigated via thermogravimetry analysis (TG).The kinetic constants of the polyurethanes were obtained with the model fitting method.The investigation shows that the first-stage of thermal degradation of the polyurethane is controlled by diffusion mechanism.The results show that the thermal stability of polyester-polyurethane is higher than that of polyether-polyurethane,and the presence of oxygen affects significantly the break of the polymeric chains.
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Key words:
- polyether-polyurethane
- / polyester-polyurethane
- / thermal degradation
- / kinetics
- / model fitting method
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