有机粘土/异戊橡胶纳米复合材料应变诱导结晶行为的研究

Study on Strain-induced Crystallization Behavior of Organic Clay/IR Nanocomposites

制备有机粘土(OC)/异戊橡胶(IR)纳米复合材料(IRCNs),研究OC用量对IRCNs拉伸性能和应变诱导结晶行为的影响。结果表明:IRCNs中OC的衍射峰角度较OC不同程度减小,且细致、均匀地分散于橡胶基体中,形成有序插层结构;随着OC用量增大,IRCNs的拉伸强度先增大后减小,当OC用量为5份时,IRCNs的拉伸强度最大(16. 44 MPa),较IR提高41%;IRCNs的应变诱导结晶行为随着OC用量增大向低应变转移,应力临界诱变点逐渐减小;当应变小于应力临界诱变点时,IRCNs中OC的取向度较低,当应变大于应力临界诱变点时,OC取向明显并趋于极限。

The organic clay(OC)/isoprene rubber(IR) nanocomposites(IRCNs) were prepared,the effect of OC amount on the tensile properties and strain-induced crystallization behavior of IRCNs was investigated. The results showed that,the diffraction peak angle of OC in IRCNs decreased to some extent compared with that of OC,and it was finely and uniformly dispersed in the rubber matrix to form an ordered intercalation structure. With the increase of OC amount,the tensile strength of IRCNs increased first and then decreased. When OC amount was 5 phr,the tensile strength of IRCNs was the highest(16. 44 MPa),which was 41% higher than that of IR. The strain-induced crystallization behavior of IRCNs shifted to low strain with the increase of OC amount,and the critical strain decreased gradually. When the strain was less than the critical point,the degree of orientation of OC in IRCNs was low,and when the strain was bigger than the critical point,the orientation of OC was obvious and close to the limit.