聚己二酸乙二醇酯/端羟基多壁碳纳米管复合材料结晶行为的研究

摘要

使用偏光显微镜、扫描电子显微镜、差示扫描量热仪和广角X射线衍射仪,研究了聚己二酸乙二醇酯/端羟基多壁碳纳米管(PEA/MWCNTs-OH)复合材料中PEA的晶体结构、结晶形态以及结晶动力学.结果表明,在PEA/MWCNTs-OH 复合材料中,MWCNTs-OH对PEA具有强烈的异相成核作用,PEA的球晶尺寸随着MWCNTs-OH含量的增多而减小,而结晶速率则随着MWCNTs-OH含量的增多而增大,且结晶温度也随着碳纳米管含量的增加而显著提高.%In this paper,the crystal structure,spherulitic morphology and crystallization behavior of poly(ethylene adipate) (PEA) in the PEA/hydroxy-multi-walled carbon nanotubes (MWCNTs-OH) composites were investigated by means of POM,DSC and WAXD.The results showed that the spherulitic size of PEA decreases with the addition of MWCTs-OH,while the non-isothermal crystallization temperature of PEA is greatly increased in the composite.Furthermore,the thermal dynamics results showed that the crystallization rate of PEA is obviously accelerated in the composites.These results clearly indicated the nucleating agent effect of MWCNTs-OH for the crystallization of PEA in the composites.Both the tensile strength and impact toughness of PEA will be improved by the reinforcing and nucleating effect of MWCNTs-OH.