氯丁橡胶/有机黏土纳米复合材料应变诱导结晶行为

通过熔体插层法制备氯丁橡胶/有机黏土纳米复合材料(CRCNs),利用偏光显微镜观察CRCNs在不同应变条件下微观结构的变化。主要研究有机黏土对CRCNs应变诱导结晶行为的影响,并通过XRD和SEM表征了CRCNs的微观结构。结果表明: 当有机黏土含量为5 phr时,CRCNs的综合力学性能最优。随着应变的增加,CRCNs的应力也在增加；当应变达到一定值时, CRCNs的应力迅速增加,应变诱导结晶集中产生。随着有机黏土含量的增加, CRCNs拉伸诱导结晶行为在高应变条件下产生。分析原因是氯丁橡胶基体中有机黏土与橡胶分子的插层结构逐渐减少,诱导结晶能力变弱。

Strain-induced crystallization behavior of Chloroprene Rubber/organic clay nanocomposites

The Chloroprene Rubber / organic clay nanocomposites (CRCNs) were prepared by melt blending method. The structure of CRCNs under different strain conditions was observed by polarizing microscope. This paper mainly studies the influence of organic clay on strain-induced crystallization of chloroprene rubber. And the microscopic phase structure of CRCNs was characterized by XRD and SEM. The result show that when the content of organic clay is 5 phr, the mechanical properties of CRCNs are optimal,the stress of CRCNs increases with the strain increase. The stress of CRCNs increases rapidly when the strain reaches a certain value, and the strain-induced crystallization of CRCNs occurred. With the clay content increasing, the tensile crystallization behavior of CRCNs is produced under high strain conditions. The reason is that the intercalation structure of organic clay and rubber molecules decreases gradually and the ability of induced crystallization weakens.