Aging behaviors of silicone rubber composite materials under outdoor environment |
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| Authors: | Zhen Huang Hongsheng Lin Xiangyang Peng Zheng Wang Rui Wang Zijian Li Pengfei Fang |
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| Affiliation: | 1.Electric Power Research Institute of Guangdong Power Grid Co., Ltd,Guangzhou,China;2.Department of Physics and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education,Wuhan University,Wuhan,China |
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| Abstract: | We investigated the aging effect on the chemical structure of silicone rubber composite materials under outdoor environment. The variations of low molecular weight siloxanes in silicone rubber were probed by gas chromatography-mass spectrometry during the degradation process. The experimental results indicate that a series of cyclic siloxanes exist in both the virgin and aged silicone rubber samples, while the additional low molecular weight siloxanes (hexamethyl cyclotrisiloxane) only appear in the aged samples. Meanwhile, the total amounts of low molecular weight siloxanes in the aged samples are much less than those in the virgin ones. The loss of low molecular weight siloxanes is induced by the chain scission and depolymerization. |
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