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介孔分子筛/聚双环戊二烯复合材料的制备

, PP. 65-72

Keywords: 聚双环戊二烯,介孔分子筛,负载,偶联剂,复合材料,力学性能

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Abstract:

将负载催化剂的SBA-15型介孔分子筛(方法1)、偶联剂表面改性的SBA-15(方法2)、偶联剂表面改性后负载催化剂的SBA-15(方法3),采用原位聚合法分别制备了SBA-15/聚双环戊二烯(PDCPD)复合材料。研究了不同制备方法对SBA-15/PDCPD力学性能的影响。结果表明,对于方法2,虽然偶联剂改性SBA-15可提高与PDCPD界面作用力,但由于分子筛孔道中的双环戊二烯(DCPD)单体难以发生聚合反应,导致复合材料的力学性能较PDCPD没有明显改善。采用方法1及方法3可使PDCPD分子链在SBA-15孔道中生成,改善了PDCPD基体与SBA-15的界面作用力,使复合材料的力学性能明显改善。采用方法1,SBA-15/PDCPD质量比为2∶100时,复合材料拉伸强度较PDCPD提高了24.5%,弯曲强度提高了24%。采用方法3制备的复合材料中偶联剂分子占据了SBA-15孔道空间,导致孔道中生成聚合物分子链数量较方法1少,使其力学性能提高幅度低于方法1,但优于方法2。

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