| 二段硫化条件对共聚型氯醚橡胶性能的影响 |
| Effect of post-cure conditions on properties of epichlorohydrin copolymer |
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| DOI： |
| 中文关键词: 共聚型氯醚橡胶 二段硫化 压缩永久变形 交联密度 耐油性能 耐热性能 |
| 英文关键词: epichlorohydrin copolymer post-cure compression set crosslink density oil resistance heat resistance |
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| 中文摘要: |
| 研究了二段硫化条件对共聚型氯醚橡胶(ECO)性能的影响。二段硫化后，ECO的100%定伸应力增大，拉伸强度和邵尔A型硬度先增大后减小，扯断伸长率、扯断永久变形及撕裂强度减小；耐热性能变化不大；常温下的耐油性能提高。高温短时的二段硫化有利于降低压缩永久变形。当二段硫化温度超过150 ℃，交联密度先增大后减小，且温度越高减小得越快。 |
| 英文摘要: |
| The effect of the post-cure conditions on properties of epichlorohydrin copolymer(ECO) was investigated.The results showed that when ECO was post-cured，the modulus at 100% increased，the tensile strength and Shore A hardness increased at first and then decreased，the elongation at break，tensile permanent set and tear strength decreased；the heat resistance changed little；and the oil resistance at room temperature improved.The post-cure at high temperature for shorter time was beneficial to decreasing the compression set.The crosslink density increased at first and then decreased as the post-cure temperature reached 150 ℃，and the higher the post-cure temperature was，the faster the crosslink density decreased. |
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