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| Study on the Hot Air Aging Mechanism of Silica Reinforced Fluorosilicone Rubber |
| Received:December 30, 2014 Revised:April 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2015.02.003 |
| KeyWord:silica reinforced fluorosilicone rubber hot air aging microcosmic structure aging mechanism |
| Author | Institution |
| WANG Rong-hua |
Norinco Group Institute 53， Jinan ， China |
| WANG Xiao-yan |
Northwest University， Xi′ an ， China |
| LI Hui |
Norinco Group Institute 53， Jinan ， China |
| LIU Ya-ping |
Norinco Group Institute 53， Jinan ， China |
| WANG Xin-bo |
Norinco Group Institute 53， Jinan ， China |
| LI Qian-qian |
Norinco Group Institute 53， Jinan ， China |
| SUN Yan |
Norinco Group Institute 53， Jinan ， China |
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| Abstract: |
| Objective To study the hot air aging mechanism of silica reinforced fluorosilicone rubber. Methods Hot air aging experiments of silica reinforced fluorosilicone rubber were conducted at different accelerated aging temperature, and the mechanical properties of the material during the aging process were studied. Meanwhile, thermal analysis, ATR-FTIR, XPS, and crosslink density tester were used to investigate the microstructure changes of fluorosilicone rubber during the 200℃ hot air aging process. Results The tensile strength and elongation retention rate at break changed slightly in low-temperature environment, while the changing trend increased in high-temperature environment. The Shore A hardness did not show significant changes during the whole aging process. Conclusion The possible aging mechanism of fluorosilicone rubber could be crosslink destruction, trifluoropropyl decomposition in side chain and partial fracture in main chain. |
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