Frontiers of Chemical Science and Engineering >
Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane composite
Received date: 04 Nov 2008
Accepted date: 12 Dec 2008
Published date: 05 Jun 2009
Copyright
The thermal degradation behaviors of polycarbonate/polymethylphenylsilsesquioxane (FRPC) composites were investigated by thermogravimetric analysis (TGA) under isothermal conditions in nitrogen atmosphere. The isothermal kinetics equation was used to describe the thermal degradation process. The results showed that activation energy (E), in the case of isothermal degradation, was a quick increasing function of conversion (α) for polycarbonate (PC) but was a strong and decreasing function of conversion for FRPC. Under the isothermal condition, the addition of polymethylphenylsilsesquioxane (PMPSQ) retardanted the thermal degradation and enhanced the thermal stability of PC during the early and middle stages of thermal degradation. It also indicated a possible existence of a difference in nucleation, nuclei growth, and gas diffusion mechanism in the thermal degradation process between PC and FRPC. Meanwhile, the addition of PMPSQ influenced the lifetime of PC, but the composite still met the demand in manufacturing and application.
Jiangbo WANG , Zhong XIN . Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane composite[J]. Frontiers of Chemical Science and Engineering, 2009 , 3(2) : 167 -171 . DOI: 10.1007/s11705-009-0006-y
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