Preparation of clay/epoxy nanocomposites by layered-double-hydroxide initiated self-polymerization

摘要: An anionic clay, magnesium–aluminum layered double hydroxide (Mg2Al–NO3–LDH), was prepared by a co-precipitation method and intercalated with poly(oxypropylene)–amindocarboxylic acid (POP– amido acid). Depending on the POP-intercalating agents molecular weight at 2000 or 400 g/mol, LDHs were analyzed to have d spacing of 6.8 2.7 nm organic incorporation 80 55 wt%, respectively. Two comparative POP/LDH hybrids allowed initiate selfpolymerization epoxy resin, diglycidyl ether bisphenol-A (DGEBA). The curing rate significantly increased using as initiators for curing, demonstrated DSC thermal analysis that exothermic peak shifted from 182 152 � C increasing organoclay addition. resultant nanocomposites LDH initiated self-polymerization improved physical properties, evidenced TGA, XRD, TEM, SEM analyses.