Synthesis of Poly(amide-imide)/Polydimethylsiloxane Graft Copolymer and the Effect of Mixing with Silicalite on the Pervaporation Property(ABSTRACTS OF PROCEEDINGS OF THE SCHOOL OF ENGINEERING SERIES J TOKAI UNIVERSITY -2003-2004-)

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The synthesis of a polydimethylsiloxane-grafted poly(amide-imide) (PAI-g-PDMS) copolymer was carried out by the polycondensation of a diamino-terminated PDMS macromonomer with trimellitic dianhydride chloride followed by chemical imidation. The copolymer membrane and the hybrid membrane with silicalite were prepared by a solvent casting method using NMP solutions, and the pervaporation properties of these membranes were evaluated. These membranes were found to exhibit the organic-permselectivity in the pervaporation of aqueous alcohols and acetone solutions, and the selectivity of PAI-g-PDMS membranes increased with an increase of PDMS content. In addition, the PAI-g-PDMS/silicalite hybrid membrane exhibited the higher organic-permselectivity than the PAI-g-PDMS membrane. Therefore, such a hybrid membrane is expected to be a highly selective and durable pervaporation membrane.
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