有机粘土/天然胶乳纳米复合材料的多轴循环拉伸诱导结晶行为研究  

Multi-axial Cyclic Tensile Induced Crystallization Behavior of Organic Clay/Natural Latex Nanocomposites

作　　者：刘兵兵 梁玉蓉 任绒艇 李子贤 赵俊 朱苗 LIU Bingbing;LIANG Yurong;REN Rongting;LI Zixian;ZHAO Jun;ZHU Miao(Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]太原工业学院材料工程系,山西太原030008

出　　处：《橡胶工业》2023年第11期850-856,共7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/天然胶乳(NRL)纳米复合材料(NRLCNs),研究有机粘土用量对NRLCNs拉伸性能的影响以及NRLCNs在不同拉伸方式、拉伸倍率和循环拉伸次数下拉伸诱导结晶行为的变化。结果表明:当有机粘土用量为4份时,NRLCNs的拉伸强度最大,为24.6 MPa,较纯NRL胶料的拉伸强度12.6 MPa增大了95%;有机粘土的加入有助于NRLCNs更快地发生拉伸诱导结晶,在一定范围内随着有机粘土用量的增大,NRLCNs的拉伸诱导结晶临界诱变点提前;经过不同拉伸倍率和循环拉伸次数预处理后,NRLCNs的拉伸诱导结晶临界诱变点发生不同程度的滞后;NRLCNs的拉伸强度随着多轴拉伸预处理循环拉伸次数的增大而增大,且经过相同预处理后,相同应变下NRLCNs的单轴拉伸强度大于多轴拉伸强度。Organic clay/natural latex(NRLCNs)nanocomposites(NRLCNs)were prepared by emulsion intercalation method.The effects of organic clay dosage on the tensile properties of NRLCNs and the changes in the tensile induced crystallization behavior of NRLCNS under different tensile modes,tensile ratios and tensile cycles were investigated.The results showed that when organic clay dosage was 4 phr,the tensile strength of NRLCNs was largest,at 24.6 MPa,which was 95%larger than the tensile strength of pure NRL compound of 12.6 MPa.The addition of organic clay contributed to the faster formation of tensile-induced crystallization of NRLCNs.In a certain range,the critical mutagenic point of tensile-induced crystallization of NRLCNs was advanced with the increase of organic clay dosage.After pretreatment with different tensile ratios and tensile cycles,the critical mutagenic point of tensile induced crystallization of NRLCNs exhibited varying degrees of hysteresis.The tensile strength of NRLCNs increased with the increase of tensile cycles of multi-axial tensile pretreatment,and after the same pretreatment,the uniaxial tensile strength of NRLCNs was larger than the multi-axial tensile strength under the same strain.

关 键 词：天然胶乳 有机粘土 纳米复合材料 拉伸诱导结晶 多轴循环拉伸 

分 类 号：TQ331.2[化学工程—橡胶工业]