| Effect of Moisture Content of Powder Filler on Properties of Fluororubber |
| Received:January 10, 2020 Revised:January 10, 2020 |
| DOI：10.12136/j.issn.1000-890X.2020.06.0434 |
| Key Words: fluororubber；powder filler；moisture content；vulcanization charecteristics；hot air aging resistance；oil resistance |
| Author Name | Affiliation | E-mail | | LIU Jinling* | Beijing Institute of Aeronautical Materials | 19801130850@126.com | | LU Ming | Beijing Institute of Aeronautical Materials | | | HU Licheng | Beijing Institute of Aeronautical Materials | |
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| Abstract: |
| The effects of the moisture content of powder filler（hereinafter referred to as filler） on the vulcanization characteristics，physical properties，hot air aging resistance and oil resistance of fluororubber were studied. The results showed that the calcium fluoride-based filler（calcium fluoride＋active magnesium
oxide ＋ calcium hydroxide） had significant moisture absorption when it experienced different temperature and humidity. The vulcanization rate of fluororubber increased with the increase of water content of filler.The moisture absorption of filler would cause the fluctuation of the tensile elongation of fluororubbers before
and after aging. The increase of moisture content of filler would cause the increase of compression set after 200 ℃×24 h aging in hot air or after 150 ℃×24 h soaking in aviation kerosene RP-3 fuel. The moisture content of filler had less significant effect on the mass and the volume change rate of fluororubber before and
after soaking in aviation kerosene RP-3 fuel. |
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