【摘要】 用超声分散原位聚合法制备了铸型(MC)尼龙/CaCO3纳米复合材料,用扫描电镜(SEM)对纳米CaCO3粒子在基体中的分散情况进行了表征,研究了纳米CaCO3用量对复合材料力学性能的影响。研究结果表明,纳米CaCO3对MC尼龙具有增韧和增强的双重效果,复合材料的拉伸强度和缺口冲击强度随着纳米CaCO3用量的增加先提高后降低,而断裂伸长率随着纳米CaCO3用量的增加而降低,当纳米CaCO3的用量为2%~3%时复合材料的综合性能最好。更多还原

【Abstract】 Monomer casting （MC） nylon/CaCO₃ nano composites were prepared by ultrasonic dispersion in situ polymerization method. The dispersion of nano-CaCO₃ in the matrix was observed by scanning electron microscopy （SEM） and the effects of nano-CaCO₃ content on the mechanical properties of the composites were studied. Experimental results showed that nano-CaCO₃ had double effects of toughening and reinforcing on MC nylon. The tensile strength and notch impact strength of the composites increased first and decreased afterwards as the increase of nano-CaCO₃ content, but the elongation at break of the composites decreased as the increase of nano-CaCO₃ content. When nano-CaCO₃ content was 2.0%-3.0%, the mechanical properties of the composites were the best.更多还原