| EPDM/POE动态硫化热塑性硫化胶的性能与结构 |
| Properties and Structure of Dynamically Vulcanized EPDM/POE TPVs |
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| DOI： |
| 中文关键词: 动态硫化 EPDM 聚烯烃弹性体 热塑性硫化胶 |
| 英文关键词: dynamic vulcanization EPDM POE thermoplastic vulcanizate |
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| 中文摘要: |
| 采用动态硫化法制备EPDM/聚烯烃弹性体(POE)热塑性硫化胶(TPV)，研究共混温度和硫化体系配比对其性能的影响，并对其形态结构进行表征。结果表明：随着共混温度的升高和硫化体系用量的增大，共混体系的硫化速率逐渐加快；TPV的拉伸强度和拉断伸长率在共混温度为150 ℃左右时达到最大，拉断伸长率随着硫化体系用量的增大而减小，而拉伸强度则先减小后略有增大；随着共混温度的升高和硫化体系用量的增大，TPV撕裂强度呈现先增大后减小趋势；当硫黄用量为0.2份时，体系出现了明显的Payne效应，EPDM交联相以平均粒径为1 μ m左右的颗粒状态分散于POE连续相中。 |
| 英文摘要: |
| The EPDM/POE thermoplastic dynamic vulcanizates (TPVs) were prepared by dynamic vulcanization，the influence of blending temperature and formulation of curing system on the properties of TPVs was investigated，and the morphologies were characterized.The results showed that，as the blending temperature and addition level of curing system increased，the vulcanization rate of blends increased.The maximum values of tensile strength and elongation at break of TPVs were obtained when the blending temperature was about 150 ℃.At this temperture，with the increase of addition level of curing system,the elongation at break decreased,but the tensile strength first decreased and then increased slightly.As the blending temperature and addition level of curing system increased，the tear strength of TPVs increased first and then decreased.When the addition level of sufur was 0.2 phr,Payne effect of the blend became significant,and the cross-linked EPDM particles with size around 1 μ m were distributed in the POE continuous phase. |
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