Preparation and Electrical Properties of Quaternary Ammonium Montmorillonite-Polystyrene Complexes

Chuzo Kato, Kazuyuki Kuroda and Hideyuki Takahara
Department of Applied Chemistry, School of Science and Engineering, Waseda University, Shinjuku-ku, Tokyo, Japan 160

Abstract: Intercalation compounds of styrene and quaternary ammonium montmorillonite were prepared by immersion of the clay in styrene monomer. The intercalation of stearyltrimethylammonium (CH3(CH2)17N(CH3)3+)-montmorillonite and styrene showed an expansion of the basal spacing to a constant value of ∼32 Å after immersion for 10 days. After polymerization, the amount of polystyrene in the interlayer region was determined by thermal gravimetric analysis. Styrene adsorption initially increased with increasing quaternary ammonium cation and then became approximately constant when loading of the quaternary ammonium cation exceeded 100 meq/100 g clay. The volume resistivity of the stearyltrimethylammonium-montmorilionite-polystyrene complex, which was determined with a high resistance meter, was greater than that of both the quaternary ammonium-montmorillonite and the montmorillonite, and increased in proportion to the amount of polymer adsorbed. These data indicate that polystyrene improved the insulating properties of the clay films.

Key Words: Electrical properties • Intercalation • Montmorillonite • Polystyrene • Quaternary ammonium complexes

Clays and Clay Minerals; August 1981 v. 29; no. 4; p. 294-298; DOI: 10.1346/CCMN.1981.0290407
© 1981, The Clay Minerals Society
Clay Minerals Society (www.clays.org)