Preparation and Properties of Natural Rubber with Filler Nanomatrix Structure
Preparation and Properties of Natural Rubber with Filler Nanomatrix Structure
复制标题
纳米填料结构天然橡胶的制备及性能
DOI：
10.1007/s00396-015-3615-7
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Kawahara
中科院分区：
文献类型：
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作者：
N. H. Yusof;K. Noguchi;L. Fukuhara;Y. Yamamoto;S. Kawahara
通过天然橡胶粒子与填料纳米粒子之间的化学键合，制备了具有填料纳米基体结构的天然橡胶。通过在胶乳阶段将乙烯基三乙氧基硅烷（VTES）接枝共聚到天然橡胶颗粒上，然后浇铸胶乳以制备铸态膜，形成填料纳米基质结构。二氧化硅纳米粒子是在接枝共聚过程中通过水解和缩合产生的，即，溶胶-凝胶反应;因此，它们连接到天然橡胶颗粒。用透射电镜观察了纳米基体结构，粒径约1 μm的天然橡胶颗粒在填料纳米基体中分散良好。通过形成填料纳米基体结构，拉伸性能显著提高。具有填料纳米基体结构的天然橡胶的损耗模量和损耗角正切在橡胶平台区几乎与变形频率无关，这被解释为是由于纳米基体结构的能量弹性和熵弹性特性。
Natural rubber with filler nanomatrix structure was prepared by forming chemical linkages between natural rubber particles and filler nanoparticles. The filler nanomatrix structure was formed by graft copolymerization of vinyltriethoxysilane (VTES) onto natural rubber particles in the latex stage followed by casting of the latex to prepare an as-cast film. The silica nanoparticles were produced during the graft copolymerization through hydrolysis and condensation, i.e., sol–gel reaction; hence, they linked to the natural rubber particles. The nanomatrix structure was observed by transmission electron microscopy, in which the natural rubber particles of about 1 μm in diameter were well dispersed in the filler nanomatrix. Tensile properties were significantly improved by forming filler nanomatrix structure. The loss modulus and loss tangent of the natural rubber with the filler nanomatrix structure were almost independent of deformation frequency in the rubbery plateau region, which was explained to be due to the energetic elasticity and entropic elasticity characteristic of the nanomatrix structure.