| 甲基乙烯基硅橡胶与EPDM共混的研究 |
| Study on MVQ/EPDM Blend |
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| DOI： |
| 中文关键词: 甲基乙烯基硅橡胶 EPDM 共混物 力学性能 相容剂 微观形态 |
| 英文关键词: MVQ EPDM blend mechanical property compatibilizer micro-morphology |
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| 中文摘要: |
| 研究了硫化剂、相容剂、白炭黑以及共混工艺和共混比对甲基乙烯基硅橡胶（MVQ）/EPDM共混物力学性能和微观形态的影响。结果表明，用过氧化二异丙苯或双25作硫化剂，用量分别在2.0～2.5和1.5～2.0份时共混物性能较佳；相容剂用量在20份以下时，共混物的拉伸强度等力学性能随相容剂A用量增大而提高，分散相尺寸减小，分布均匀；高补强透明白炭黑的补强效果显著，且白炭黑应先分别混入110-8MVQ和EPDM；高温混炼优于低温混炼；随EPDM含量增大共混物力学性能提高。 |
| 英文摘要: |
| The influences of the curing system，compatibilizer，silica as well as the blending technique and blending ratio on the mechanical properties and micro-morphology of MVQ/EPDM blend were investigated. The results showed that a blend with better properties could be obtained when 2.0～2.5 phr of DCP or 1.5～2.0 phr of 2，5-dimethyl-2，5-di（tertbutyl peroxy）hexane was used as curing agent；the physical properties，such as tensile strength，of the blend increased，the discontinuous phase decreased in size and dispersed more uniformly as the level of the compatibilizer increased up to 20 phr；the high effective transparent reinforcing silica was suitable for the blend to get good reinforcement when it was separately added to 110-8 MVQ and EPDM previously；it was better to mix the blend at the elevated temperature than at the low temperature；and the physical properties of the blend increased as the EPDM proportion increased. |
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