硫黄硫化体系对NR/CM共混胶性能的影响

全文下载：2014020178

蔡小慧， 房海滨， 陈春花， 辛振祥*

 （青岛科技大学 高分子科学与工程学院；RCAD研究室，山东 青岛 266042）

 摘要： 研究了普通、半有效以及有效硫黄硫化体系对于天然橡胶（NR）和氯化聚乙烯橡胶（CM）的共混胶的硫化特性的影响。结果发现，半有效硫黄硫化体系的共混胶拥有较高的拉伸强度、拉断伸长率以及撕裂强度。这是因为该体系生成的NR交联网络能够与CM相的交联网络相匹配，从而提高了整体的物理性能。通过平衡溶胀法测量交联密度得出，各组的交联密度与正硫化时间成正比。共混胶的性能不仅与硫化程度有关，也与两相的交联网络匹配程度有重要关系。

关键词： CM； NR； 硫化体系； 共混胶； 物理性能

中图分类号： TQ 333.92文献标志码： A

 Effects of Vulcanization System on NR/CM Blends Property

 CAI Xiaohui， FANG Haibin， CHEN Chunhua， XIN Zhenxiang

(College of Polymer Science and Engineering，RCAD Laboratory, Qingdao University of Science and Technology，Qingdao 266042，China)

 Abstract: Effects of conventional vulcanization (CV) system, efficient vulcanization (EV) system and semiefficient vulcanization (SEV) system on NR/CM blends have been investigated. Better tensile strength, tear strength and elongation at break were obtained curing by SEV system. It reveals that the crosslink network of two phases could be matched better curing by SEV. Meanwhile, crosslink degree was determined by the equilibrium swelling method and crosslink degree is positive correlation with the proper scorch time. However, higher crosslink degree cannot leads to better mechanical properties. It also attributes to the matching of crosslink network of two phases.

Key words: CM； NR； vulcanization system； blends; mechanical propertie

收稿日期： 20130609

作者简介： 蔡小慧(1988—)，女，硕士研究生.*通信联系人.