采用聚酰胺-胺(PAMAM)树枝状大分子对硅烷偶联剂处理过的凹凸棒石(ATP)进行接枝改性,制得改性粒子ATP-PAMAM.通过热重-差热分析(TG/DTA)和红外光谱(FIIR)表征了PAMAM在ATP表面的接枝效果.以该ATP-PAMAM为分散相,PP-g-MAH为相容剂与聚丙烯(PP)基体熔融共混制备了PP/ATP-PAMAM复合材料.结果表明:用ATP-PAMAM制得的复合材料比用未处理的ATP制得的复合材料具有更好的综合力学性能;ATP-PAMAM呈纳米棒状均匀分散在PP基体中,通过与PP-g-MAH发生化学反应,提高了与PP的相容性,与基体结合良好;具有异相成核作用,使PP的结晶度有较大提高.
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