English Abstract

Study on Clay Silicate Layer Exfoliation in Copolymers. Naoki Hasegawa Toyota Central Research & Development Laboratories, Inc.,TokyoJapan Nippon Gomu Kyokaishi,(2003),76(10), 370-374 General Review in Japanese. Abstract Polymer-clay nanocomposites have been actively researched in these decades. We studied exfoliation of clay silicate layers in copolymers. Four types of organophilic clay, as bellow, were prepared and examined; organophilic clay ion-exchanged with alkyl ammonium ions consisted of different alkyl chain lengths, partially ion-exchanged with alkyl ammonium ions, ion-exchanged with organophilic reagents containing two ammonium ions, ion-exchanged with alkyl ammonium ions containing hydroxide groups(-OH). The dispersibility of the silicate layers in polymers is dependent on polarity matching between the polymers and the organophilic clay. Keywords: Clay, Nanocomposites, Copolymer, Exfoliation, Polarity

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