Thermal Degradation Characteristics and Kinetics of High Temperature Vulcanized (HTV) Silicone Rubber/POSS Hybrid
A high temperature vulcanized (HTV) silicone rubber/octavinyl polyhedral oligomeric silsesquioxane (POSS) hybrid was prepared. The micromorphology of the cured hybrid was investigated by scanning electron microscopy (SEM); the thermal degradation stability of this hybrid was studied by means of thermal gravimetric analyses (TGA); the degradation kinetics of this hybrid was also studied using Doyle method and Coats-Redfem method. Results showed that aggregation of self-cross-linked octavinyl POSS appeared in the HTV silicon rubber/POSS hybrid. The incorporation of POSS into silicon rubber networks enhanced the thermal degradation resistance of the matrix. Activation energy derived by the CoatsRedfern method (142.24 kJ/mol) showed a good agreement with the mean value derived by the Doyle method (146.51 kJ/mol); the thermal degradation reaction of the hybrid followed a three-dimensional diffusion law (D4).
HTV silicone rubber Octavinyl POSS Thermal degradation Kinetics
Dong Yang Wei Zhang Ru Liang Yao Ben Zheng Jiang
College of Aerospace and Materials Engineering, National University of Defense Technology,Changsha 410073, PRC
国际会议
上海
英文
1657-1661
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）