纳米碳酸钙对填充型粉末丁苯橡胶硫化胶力学性能的影响

Effect of Nano-CaCO_3 on Mechanical Properties of Filled Powdered Styrene-Butadiene Rubber Vulcanizate

采用凝聚共沉法制备了纳米碳酸钙填充型粉末丁苯橡胶[P(SBR/CaCO3)],研究了纳米碳酸钙填充量对P(SBR/CaCO3)硫化胶力学性能的影响,并与块状丁苯橡胶/纳米碳酸钙机械混炼胶(SBR/CaCO3)硫化胶的进行了比较。结果表明:当纳米碳酸钙填充量相同时,P(SBR/CaCO3)硫化胶的力学性能基本上都优于SBR/CaCO3硫化胶的,当纳米碳酸钙填充量为100份时,P(SBR/CaCO3)硫化胶的力学性能最佳,其拉伸强度达13.38 MPa,明显好于SBR/CaCO3硫化胶的;纳米碳酸钙在P(SBR/CaCO3)硫化胶中比在SBR/CaCO3硫化胶中具有更好的分散性和界面结合力,因此具有更好的力学性能。

Nano-CaCO3 filled styrene-butadiene rubber（SBR） powder P（SBR/CaCO3） was prepared with condensation coprecipitation method.The effect of nano-CaCO3 filling amount on the mechanical properties of P（SBR/CaCO3） vulcanizate was studied.Then the material was compared with the bulk vulcanizate of mixed SBR/nano-CaCO3.It is found that when the nano-CaCO3 filling amount of P（SBR/CaCO3） vulcanizate and SBR/CaCO3 vulcanizate was the same,the mechanical properties of the former were basically superior to the later.When the filling amount of the nano-CaCO3 was 100 phr,the best mechanical properties of P（SBR/CaCO3） vulcanizate could be obtained,while the tensile strength could reach 13.38 MPa which was obviously better than that of the SBR/CaCO3 one.It was originate from that the nano-CaCO3 in the former had better dispersion and interface bonding force than that in the later,which led to the better mechanical properties.