有机粘土/天然胶乳纳米复合材料的循环拉伸诱导结晶行为研究  

Tensile-included Crystallization Behavior of OC/NRL Nanocomposites by Cyclic Stretching

作　　者：郝英杰 谭昊哲 王健 褚丽君 梁玉蓉 HAO Yingjie;TAN Haozhe;WANG Jian;CHU Lijun;LIANG Yurong(Taiyuan Institute of Technology,Taiyuan 030008,China;Beijing University of Chemical Technology,Beijing 100029,China;North University of China,Taiyuan 030051,China)

机构地区：[1]太原工业学院材料工程系,山西太原030008 [2]北京化工大学材料科学与工程学院,北京100029 [3]中北大学材料科学与工程学院,山西太原030051

出　　处：《橡胶工业》2020年第12期904-908,共5页China Rubber Industry

基　　金：国家自然科学基金资助项目(51573124)。

摘　　要：采用乳液插层法制备有机粘土(OC)/天然胶乳(NRL)纳米复合材料(NRLCNs),研究OC用量和循环拉伸对NRLCNs拉伸诱导结晶行为的影响。结果表明:NRLCNs为插层结构,随着OC用量的增大,NRLCNs的拉伸强度先增大后减小,当OC用量为4份时,NRLCNs的力学性能达到最佳,拉伸强度为15.86 MPa,较天然橡胶胶料(未加OC)的拉伸强度提高58%;OC的加入有助于NRLCNs发生拉伸诱导结晶,随着其用量的增大,NRLCNs的拉伸结晶临界诱变点的拉伸应变减小;经过循环拉伸处理的NRLCNs橡胶分子产生了一定的取向,再次拉伸时NRLCNs能够更快地达到拉伸结晶临界诱变点,产生拉伸诱导结晶。Organic clay(OC)/natural rubber latex(NRL) nanocomposites(NRLCNs) were prepared by emulsion intercalation method,and the effects of the addition level of OC and cyclic stretching on the tensile-induced crystallization behavior of NRLCNs were studied.The results showed that NRLCNs had an intercalation structure.With the increase of the addition level of OC,the tensile strength of NRLCNs first increased and then decreased.When the addition level of OC was 4 phr,the mechanical properties of NRLCNs reached the best,with a tensile strength of 15.86 MPa,which was higher than that of natural rubber compound(without CO) by 58%.Meanwhile,the addition of OC helped NRLCNs to undergo tensileinduced crystallization,and as its addition level increased,the tensile strain at the critical mutation point of tensile crystallization of NRLCNs decreased.At the same time,after the cyclic stretching treatment,the rubber molecules of NRLCNs had a certain orientation,and when they were stretched again,they could reach the critical mutation point faster,resulting in tensile-induced crystallization.

关 键 词：有机粘土 天然胶乳 纳米复合材料 乳液插层法 循环拉伸 拉伸诱导结晶 

分 类 号：TQ330.383[化学工程—橡胶工业] TQ331.2