【摘要】 以高岭土和白炭黑作为增强剂,采用熔融共混法制备了一系列的天然橡胶(NR)复合材料,并对其微观结构、气体阻隔性能和力学性能进行了表征。结果表明,改性高岭土(MK)以片层结构,白炭黑(PS)以球状结构,均匀分散于NR基体之中;MK与PS单独填充NR时,随着MK填充量的增加,NR复合材料的气体阻隔性能逐渐提高,而且MK的增强和阻隔作用都优于PS;MK与PS并用填充时,混合物填充NR复合材料的阻隔性能、拉伸模量和拉伸强度都优于MK、PS单独填充的NR复合材料,填料并用更有效地改善了NR复合材料的气体阻隔性能和力学性能。更多还原

【Abstract】 A series of natural rubber(NR) composites with modified kaolin(MK) and precipitated silica(PS) were prepared by melt blending,and their microstructure,gas barrier properties and mechanical properties were characterized.The results show that flake-like kaolinite and spherical silica particles are evenly dispersed in the natural rubber matrix.When NR is filled by MK or PS separately,the gas barrier properties of NR composites are improved gradually with the increasing of MK content,and MK is superior to PS in the barrier and reinforcing capability.When NR is filled by MK and PS blends,their gas barrier properties,tensile strength and tensile modulus all surpass that of NR composites filled by MK or PS separately,and MK/PS hybrid filler further improves the gas barrier properties and mechanical properties of NR composites.更多还原