可反应性纳米SiO_2/尼龙1010复合材料的制备和力学性能

Synthesis and mechanical properties of reactable nano-silica/PA1010 composites

以可反应性纳米SiO_2(RNS)为填料,用熔融共混法制备SiO_2/尼龙1010纳米复合材料,表征其力学性能并研究了增强和增韧机理.结果表明,在熔融共混过程中RNS与尼龙1010发生了强烈的界面相互作用,提高了材料的拉伸强度、断裂伸长率和弹性模量;而纳米SiO_2的表面有机修饰层使材料的韧性有所提高.纳米SiO_2质量分数为1.0%的复合材料拉伸强度最大,比纯尼龙1010的高4%;而0.7%纳米SiO_2的复合材料断裂伸长率和弹性模量最大,分别比纯尼龙的高16.6%和13.4%.

Polyamide 1010 （PA1010） nanocomposites reinforced with reactable nano-SiO2 （RNS） were prepared using melt-blending method. The mechanical properties of the filled composites were appraised and the mechanism for the enhancement of strength and toughness were discussed. The results show that there exists strong interracial interaction between the nylon matrix and reactable nano-Si02 filler, resulting in the tensile strength, break elongation and elastic modulus of the composites increased. And the presence of the organic modification layer on the surface of nano-silica helps to enhance the toughness of the nylon-based composites. The composite containing 1.0% nano-silica （mass fraction） has the highest tensile strength, while that containing 0.7% nano-silica shows the highest break elongation and tensile modulus.