MC尼龙／Sm2O3纳米复合材料的制备及性能研究

用原位分散聚合法制备了一系列MC尼龙/Sm2O3纳米复合材料,并对其结构和力学性能进行了表征.结果表明,纳米Sm2O3使MC尼龙晶格尺寸发生了一定程度的改变;纳米Sm2O3的加入可以明显改善MC尼龙的力学性能,对MC尼龙同时具有增强和增韧双重效果;MC尼龙/Sm2O3纳米复合材料的力学性能随着纳米Sm2O3用量的增加呈先升高后降低的趋势.当纳米Sm2O3的质量分数为0.5%时,复合材料的拉伸强度和断裂伸长率达到最大值,分别比MC尼龙提高了18.8%和91.5%,当纳米Sm2O3的质量分数为1.0%时,复合材料的缺口冲击强度、穹曲强度和弯曲弹性模量达到最大值,分别比MC尼龙基体提高了36.6%、11.2%和11.5%.

PREPARATION AND PROPERTIES OF MC NYLON/Sm2O3 NANOCOMPOSITES

A series of MC nylon/Sm2O3 nanocomposites were prepared via in situ polymerization, and their structure and properties were characterized. The result showed that: nano-Sm2O3 didn't change the crystal structure of MC nylon, but changed the crystal lattice size of MC nylon;nano-Sm2O3 could obviously increase the mechanical properties of MC nylon,with the double result of strengthening and toughing MC nylon at the same time;the tensile strength, elongation at break, impact strength, flexural strength and flexural modulus of nanocomposites first increased, then decreased as the addition of the content of nano-Sm2O3. When the content of nano-Sm2O3 was 0.5%, the tensile strength and elongation at break of nanocomposites reached maximum, which was 18.8% and 91.5% higher respectively than MC nylon. When the content of nano-Sm2O3 was 1.0%, the impact strength, flexural strength and flexural modulus of nanocomposites reached maximum, which was 36.6%, 11.2% and 11.5% higher respectively than MC nylon.