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乙烯基笼型倍半硅氧烷/聚丙烯纳米复合材料热降解动力学 被引量:5

Kinetics of Thermal Degradation of V-POSS/Polypropylene Blend
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摘要 用热重分析(TGA)法研究了乙烯基笼型倍半硅氧烷(V-POSS)/聚丙烯纳米复合材料的热降解动力学。采用Kim-Park,Flynn-Wall-Ozawa和Friedman三种方法计算了共混物的降解反应活化能,结果说明,当V-POSS加入质量分数分别为4%、8%、12%和16%、升温速率为5℃/min时材料热降解起始温度分别提高了27.1℃、29.3℃、52.6℃和66.9℃,热降解反应活化能E_a提高了10 kJ/mol~50 kJ/mol,反应级数n也随V-POSS加入量增多有所提高,材料热稳定性得到了改善。 The polypropylene (PP) was modified by vinyl-polyhedrol oligomeric silsesquioxane (V-POSS). The non-isothermal degradation processes of V-POSS/PP nanocomposites were investigated by thermogravimetry (TG) analysis. The activation energies Ea and reaction orders n were calculated by Kim-Park, Flynn-Wall-Ozawa and Friedman methods. The results show that the non-isothermal degradation of V-POSS/PP nanocomposites is one-stage degradation processes. When mass fraction of V-POSS is 4%, 8%, 12% and 16%, the thermal degradation temperatures increases 27.1 ℃, 29.3 ℃ 52.6℃ and 66.9 ℃ respectively, the thermal degradation Ea increases from 10 kJ/mol to 50 kJ/mol, and n also increases with increasing V-POSS content. It shows that V-POSS can increase heat stability of pure iPP.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2011年第6期106-109,共4页 Polymer Materials Science & Engineering
基金 河北省自然科学基金资助课题(E2007000204)
关键词 笼型聚倍半硅氧烷 聚丙烯 热重分析 降解动力学 silsesquioxane polypropylene thermogravimetric analysis degradation kinetics
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参考文献8

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二级参考文献37

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