摘要
采用原位乳液聚合制备了聚苯乙烯丁二烯橡胶(SBR)/凹凸棒石(AT)纳米复合材料。凹凸棒石的存在一定程度上降低了乳液聚合速率,但对最终聚合产物的分子质量及分子质量分布影响不大。凹凸棒石以长0.5～5μm、直径为20～50nm的棒状纤维均匀的分散在SBR基体中。在硫化过程中,凹凸棒石纤维与橡胶形成互穿网络结构,增加了橡胶的交联密度。随着凹凸棒石的填充量增加,纳米复合材料的300%定伸应力和拉伸强度与纯SBR相比均提高了20%～100%,其补强效果明显高于等量的炭黑N330,还表现出良好的耐磨性能。
Styrene-butadiene rubber (SBR)/attapulgite nanocomposites were prepared by in situ emulsion polymerization.The copolymerization rate was decreased monotonically with the increasing of the amount of attapulgite while the molecular weight and the molecular weight distribution SBR extracted from nanocomposites remained basically unchanged.The attapulgite was uniformly dispersed in SBR matrix as fibers with a length of 0.5-5 μm and diameter of 20-50 nm.The nanoscale dispersed attapulgite fibers contributed to form interpenetrating polymer network(IPN) structure with SBR during vulcanization,hence the crosslinking degree increased,meanwhile it offered the composites excellent mechanical properties.The nanocomposites exhibited about a 20%-100% increase in the 300% modulus and tensile strength and significantly lower the abrasion loss depending on the content and showed a better reinforcement efficiency than with the same content of carbon black N330 as the filling material.
出处
《现代化工》
CAS
CSCD
北大核心
2004年第7期36-39,共4页
Modern Chemical Industry
基金
国家杰出青年科学基金资助项目(20125617)
