Intercalates formed by co-intercalation of monomer, oligomer or polymer intercalants and surface modifier intercalants and layered materials and nanocomposites prepared with the intercalates
申请人:AMCOL INTERNATIONAL CORPORATION
公开号:EP0846661A2
公开(公告)日:1998-06-10
The present invention discloses intercalates formed by contacting a layered material, e.g., a phyllosilicate, with an intercalant monomer surface modifier including an alkyl radical having at least 6 carbon atoms and a polymerizable monomer, oligomer or polymer. The intercalant monomer surface modifier converts the interlayer region of the layered materials from hydrophilic to hydrophobic, therefore, polymerizable monomers, oligomers or polymers can be easily intercalated into the interlayer spacing. The co-presence of the intercalant monomer surface modifier and polymerizable monomer, oligomer or polymer provide an environment for more polymerizable monomers, oligomers or polymers to be intercalated into the interlayer spacing and the intercalates are readily exfoliated into polymer matrices to form nanocomposites. The nanocomposites (e.g., epoxy-clay) prepared from the intercalates demonstrated enhanced mechanical, thermal and chemical resistance compared with pristine polymer matrices.
本发明公开了通过将层状材料(如植硅酸盐)与插层单体表面改性剂(包括具有至少6个碳原子的烷基自由基和可聚合单体、低聚物或聚合物)接触而形成的插层材料。插层单体表面改性剂可将层状材料的层间区域从亲水性转化为疏水性,因此可聚合单体、低聚物或聚合物可以很容易地插层到层间距中。插层单体表面改性剂和可聚合单体、低聚物或聚合物的共存为更多的可聚合单体、低聚物或聚合物插层到层间距中提供了环境,插层物很容易剥离到聚合物基质中形成纳米复合材料。与原始聚合物基质相比,用插层材料制备的纳米复合材料(如环氧树脂-粘土)具有更强的机械性能、耐热性和耐化学性。