采用有机粘土 (OC)填充溴化丁基橡胶 (BIIR)熔体插层法制备了OC/BIIR纳米复合材料 (BIIRCNs),研究了BIIRCNs的硫化特性、微观相态结构、热稳定性、液体阻隔性能和力学性能。结果表明:OC的加入导致OC/BIIR混炼胶的硫化速率下降,交联密度增加;OC的加入提高了BIIRCNs的热稳定性;随OC含量的增加,BIIRCNs对有机溶剂的吸附量先下降后上升,5份OC制备的BIIRCNs的溶剂吸附量较纯BIIR下降30%;当OC含量为5份时,BIIRCNs中OC片层间距增至3.96nm (OC的起始层间距为2.44nm),且OC在橡胶基体中分散相态较为细致、均匀,表明形成了插层型甚至是部分剥离型结构的复合材料;5份OC制备的BIIRCNs的拉伸强度和撕裂强度分别约为7.60MPa和11.26N/mm,较纯BIIR的3.14MPa和7.42N/mm分别提高了约142%和52%。
The vulcanization parameters,micro-morphology structure,thermostability,liquid barrier properties and mechanical properties of organic clay (OC)/brominated butyl rubber (BIIR) nanocomposites (CNs) with different copies of OC were studied.Results shown that:OC can decrease the vulcanization rate and increased the crosslinking density of OC/BIIR mixture.OC can increase the thermostability of BIIR.With the increase of OC content,the adsorption amount of organic solvent decreased first and then increased,when OC was filled with 5phr,the adsorption amount of organic solvent of BIIRCNs decreased by 30% than BIIR.When OC was filled with 5phr,BIIRCNs clay lamella spacing of 3.96nm was greater than the OC clay lamella spacing of 2.44nm,and the dispersion phase of OC in rubber matrix was more detailed and uniform,shown that the formation of more intercalated and exfoliated structures.And when OC was filled with 5phr,the tensile strength,tear strength respectively 3.14MPa and 7.42N/mm of pure BIIR,BIIRCNs respectively 7.60MPa,11.26N/mm,which increased by 142% and 52% respectively.
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基金资助
国家自然科学基金(51573124);山西省“1331工程”重点学科建设计划经费资助项目(2015021072)
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