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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. shu

Kinetics of Thermal Degradation of Polyurethane Elastomers

YUAN Kai-Jun ^a ,
JIANG Zhi ^a ,
LI Shu-Fen ^a,, ,
CHOW W K ^b

1.
a Department of Chemical Physics, University of Science and Technology of China, Hefei 230026;
2.
b Department of Building Services Engineering, Hong Kong Polytechnic University, Hong Kong

Corresponding author: LI Shu-Fen,
Received Date: 21 August 2004
Available Online: 23 November 2004
Fund Project: 香港理工大学火灾安全工程基金资助(A-078) (A-078)

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.
- polyether-polyurethane,
- polyester-polyurethane,
- thermal degradation,
- kinetics,
- model fitting method
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