交联EPR的动态流变及蠕变行为

发布时间：2018-06-12 22:34

  本文选题：交联 + 网络　； 参考：《石油化工》2017年11期

【摘要】：采用原位聚合一步法合成乙烯-丙烯无规共聚物(EPR),并加入1,9-癸二烯(DD)使EPR形成交联结构。通过小振幅震荡剪切流变的方法研究了交联程度不同的EPR的动态流变行为。实验结果表明,随DD含量的增加,EPR的交联程度增大,储能模量和损耗模量均随之增加,黏度逐渐增大,并出现明显的末端平台。随交联程度的增大,EPR的应变逐渐减低,弹性逐渐增加,自身的抗蠕变能力逐渐增强。交联程度高的EPR的抗蠕变性能可以提高材料的耐疲劳性,延长材料的使用寿命,拓宽EPR的应用领域。
[Abstract]:The ethylene propylene random copolymer (EPRN) was synthesized by one step in situ polymerization and the crosslinked structure of EPR was formed by adding 1 / 9-decenediene (DDD). The dynamic rheological behavior of EPR with different crosslinking degree was studied by means of small amplitude oscillatory shear rheology. The experimental results show that with the increasing of DD content, the crosslinking degree of EPR increases, the energy storage modulus and loss modulus increase, the viscosity increases gradually, and an obvious end platform appears. With the increase of crosslinking degree, the strain of EPR decreases, the elasticity increases, and the creep resistance of EPR increases. The creep resistance of EPR with high crosslinking degree can improve the fatigue resistance of the material, prolong the service life of the material and broaden the application field of EPR.
【作者单位】： 中国科学院化学研究所工程塑料重点实验室;中国石油抚顺石化分公司烯烃厂;中国石油抚顺石化分公司乙烯化工厂水汽中心;中国科学院大学;
【基金】：国家自然科学基金资助项目(21574143)
【分类号】：O631.2
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本文编号：2011322