Remarkable reinforcement of natural rubber by deformation-induced crystallization in the presence of organophilic montmorillonite
Remarkable reinforcement of natural rubber by deformation-induced crystallization in the presence of organophilic montmorillonite
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在亲有机蒙脱石存在下通过变形诱导结晶显着增强天然橡胶
DOI：
10.1016/j.actamat.2009.07.007
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发表时间：
2009-10-01
期刊：
影响因子：
9.4
通讯作者：
Nie, Yijing
中科院分区：
文献类型：
--
作者：
Qu, Liangliang;Huang, Guangsu;Nie, Yijing
在天然橡胶（NR）中加入少量的有机改性蒙脱土（OMMT），可获得显著的补强效果。力学测试表明，最显着的增强在NR的拉伸强度是在OMMT含量为5重量%。为了深入研究OMMT的增强机理，采用同步辐射广角X射线衍射（SDXRD）和透射电镜（TEM）研究了不同OMMT含量的NR/OMMT纳米复合材料的形变诱导结晶行为和形态。结果表明，应变诱导晶化程度的变化规律与拉伸强度的变化规律一致。拉伸强度在5 wt.% OMMT含量的增加是由于应变诱导结晶是增强NR的主要因素。此外，OMMT分散在NR基体中的纳米形态对NR在变形过程中的结晶行为起着决定性的作用。OMMT的剥离程度越高，对NR的形变诱导结晶的促进作用越强。皇冠版权（C）2009年由爱思唯尔有限公司代表Acta Materialia Inc.出版。All rights reserved.
A remarkable reinforcement of natural rubber (NR) was achieved by adding a low content of organically modified montmorillonite (OMMT). Mechanical tests demonstrated that the most noticeable enhancement in the tensile strength of NR was at a OMMT content of 5 wt.%. In order to gain further insight into the mechanism of reinforcement by OMMT, the deformation-induced crystallization behavior and morphology of NR/OMMT nanocomposites with different OMMT contents were investigated by synchrotron wide angle X-ray diffraction and transmission electron microscopy. The results show that the variation in the degree of strain-induced crystallization is consistent with that of tensile strength. The peak in tensile strength at 5 wt.% OMMT content can be ascribed to the fact that strain-induced crystallization is the essential factor in reinforcement of NR. Further, the nanomorphology of OMMT dispersed in a NR matrix plays a decisive role in the crystallization behavior of NR during deformation. An increase in the exfoliation of OMMT leads to an increase in the promotion of deformation-induced crystallization of NR. Crown Copyright (C) 2009 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. All rights reserved.