拉伸速率对天然橡胶/有机黏土复合材料力学性能的影响  

Effect of tensile rate on mechanical properties of natural rubber/organoclay composites

作　　者：高国玮 梁玉蓉[1,2] 张政 张涛 GAO Guowei;LIANG Yurong;ZHANG Zheng;ZHANG Tao(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;Department of Materials Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China)

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

出　　处：《弹性体》2024年第1期13-17,共5页China Elastomerics

基　　金：国家自然科学基金资助项目(51573124)。

摘　　要：采用I.44P有机黏土填充天然橡胶(NR)制备天然橡胶/有机黏土复合材料(NRCNs),考察拉伸速率对NRCNs力学性能的影响。结果表明,单轴拉伸测试下,拉伸速率为50 mm/min时,NRCNs的力学性能最优,拉伸强度达到19.50 MPa,较拉伸速率为500 mm/min时的拉伸强度提高了22.64%;随着拉伸速率的提高,NRCNs的结晶度逐渐减小,表明NRCNs在较慢的拉伸速率下降温结晶性能更好。多轴拉伸测试下,当应变为120%、拉伸速率为50 mm/min时,NRCNs的力学性能最优,拉伸强度达到0.38 MPa,较拉伸速率为10 mm/min时的拉伸强度提高了8.57%;在相同的拉伸速率下,经过单轴拉伸的NRCNs的拉伸强度为0.8 MPa,较多轴拉伸的NRCNs的拉伸强度提高了128.57%。Natural rubber/organoclay composites(NRCNs)were prepared by 1.44P organic clay filled with natural rubber(NR),and the effect of tensile rate on the mechanical properties of NRCNs was investigated.The results show that under the uniaxial tensile test,when the tensile rate is 50 mm/min,the mechanical properties of NRCNs are the best,and the tensile strength reaches 19.50 MPa,which is 22.64%higher than that at the tensile rate of 500 mm/min.With the increase of the tensile rate,the crystallinity of NRCNs gradually decreased,indicating that the crystallization performance of NRCNs was better at the lower tensile rate.Under the multiaxial tensile test,the tensile strength of NRCNs was the best when the tensile strain was 120%and the tensile rate was 50 mm/min,and the tensile strength reached 0.38 MPa,which was 8.57%higher than that at the tensile rate of 10 mm/min.At the same tensile rate,the tensile strength of NRCNs with uniaxial tension was 0.8 MPa,and the tensile strength of NRCNs with multiaxial tension increased by 128.57%.

关 键 词：天然橡胶 拉伸速率 拉伸强度 

分 类 号：TQ332[化学工程—橡胶工业]