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Non-isothermal degradation kinetics for polycarbonate/ polymethylphenylsilsesquioxane composites
The thermal degradation behaviours of PC/PMPSQ (polycarbonate/polymethylphenylsilsesquioxane) systems were investigated by TGA (thermogravimetric analysis) under nonisothermal conditions in nitrogen atmosphere. During nonisothermal degradation, Kissinger and Flynn-Wall-Ozawa methods were used to analyse the thermal degradation process. The results showed that a remarkable decrease in E (activation energy) was observed in the early and middle stages of thermal degradation in the presence of PMPSQ, which indicated that the addition of PMPSQ promoted the thermal degradation of PC. Flynn-Wall-Ozawa method further revealed that PMPSQ significantly increased the activation energy of PC thermal degradation in the final stage, which illustrated that the PMPSQ stabilised the char residues and improved the flame retardancy of PC in the final period of thermal degradation process.
Non-isothermal degradation kinetics for polycarbonate/ polymethylphenylsilsesquioxane composites
The thermal degradation behaviours of PC/PMPSQ (polycarbonate/polymethylphenylsilsesquioxane) systems were investigated by TGA (thermogravimetric analysis) under nonisothermal conditions in nitrogen atmosphere. During nonisothermal degradation, Kissinger and Flynn-Wall-Ozawa methods were used to analyse the thermal degradation process. The results showed that a remarkable decrease in E (activation energy) was observed in the early and middle stages of thermal degradation in the presence of PMPSQ, which indicated that the addition of PMPSQ promoted the thermal degradation of PC. Flynn-Wall-Ozawa method further revealed that PMPSQ significantly increased the activation energy of PC thermal degradation in the final stage, which illustrated that the PMPSQ stabilised the char residues and improved the flame retardancy of PC in the final period of thermal degradation process.
Non-isothermal degradation kinetics for polycarbonate/ polymethylphenylsilsesquioxane composites
Wang, Jiangbo (author) / Xin, Zhong (author)
e-Polymers ; 1-10
2010
10 Seiten, 8 Bilder, 2 Tabellen, 17 Quellen
Article (Journal)
English
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