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多壁碳纳米管/聚丙烯复合材料的结晶行为

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Keywords: 聚丙烯,多壁碳纳米管,接枝,复合材料,结晶

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Abstract:

采用表面接枝十六烷烃的方法对多壁碳纳米管(MWCNTs)进行改性,通过溶液共混法制备多壁碳纳米管/聚丙烯(MWCNTs/PP)复合材料,并研究了MWCNTs/PP的结晶行为。结果表明,3%(质量分数)表面接枝十六烷烃的MWCNTs在PP基体中分散良好,达到纳米级的分散。加入接枝MWCNTs后,PP的结晶结构未发生改变,依然是α晶型。接枝MWCNTs对PP有异相成核的作用,加入接枝MWCNTs使PP的成核及晶体生长方式发生变化。加入3%(质量分数)接枝MWCNTs以后,PP的结晶温度升高了8℃,结晶速率提高了1倍,结晶度提高了3%,球晶尺寸减小。

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