| 硅烷接枝二元乙丙橡胶对EPDM/MVQ共混物的改性及改性机理探讨 |
| Modification of EPDM/MVQ with silane-grafting EPM |
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| DOI： |
| 中文关键词: 硅烷接枝二元乙丙橡胶 相容剂 EPDM 甲基乙烯基硅橡胶 共混物 改性 |
| 英文关键词: silane-grafting EPM compatibilizer EPDM MVQ blend modification |
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| 中文摘要: |
| 探讨了硅烷接枝二元乙丙橡胶(EPM-g-S)作相容剂对EPDM/甲基乙烯基硅橡胶(MVQ)共混物的改性及改性机理。EPM-g-S是EPM、硅烷偶联剂A-174[γ-(甲基丙烯酰脱氧基)丙基三甲氧基硅烷]和过氧化物DCP在布拉本德自记硫化仪中,通过高温(170～190 ℃)、高剪切(转子转速为60～80 r·min-1)热炼而成的。用EPM-g-S作相容剂,可以改善EPDM/MVQ共混物的物理性能、耐热性能(耐热温度从150 ℃提高到170 ℃)和高温压缩永久变形性能。红外光谱试验证明,EPM-g-S是硅烷偶联剂A-174接枝到EPM分子链上的产物,EPDM与MVQ和EPDM与EPM-g-S是通过过氧化物交联体系共交联的。 |
| 英文摘要: |
| The EPDM/MVQ was modified by using the silane-grafting EPM (EPM-g-S)as the compatibilizer and the modification mechanism was discussed.EPM-g-S was obtained by mixing EPM，silane coupling agent A-174[γ-(methyl acryldeoxy)propyl trimethyl silane] and DCP in a Brabender rheometer at the high temperature (170 ～ 190 ℃) and the high shearing (with rotor speed of 60 ～ 80 r·min-1.The physical properties，particularly the heat resistance and the compression set at high temperature of EPDM/MVQ were improved by using EPM-g-S as compatibilizer.It was found with infrared absorption spect rum that EPM-g-S was the product of the silane coupling agent A-174 grafted on the EPM molecular chain and the covulcanization of EPDM/MVQ or EPDM/EPM-g-S was achieved by peroxide crosslinking agent. |
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