Morphological and Rheological Behavior of Poly(esterimide-siloxane) Containing Long Chain Alkyl Groups/Epoxy Resin Composites

概要

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Two composite films composed of different poly (esterimide-siloxane) (PEsI-Si) -containing decamethylene groups derived from 1, 3-bis (3-aminopropyl) tetramethyl disiloxane (TSX) or bis (γ-aminopropyl) polydimethyl siloxane (PSX, molecular weight: 914), an epoxy resin, and a silver filler were prepared. The effect of siloxane segment length of the PEsI-Si on the morphological and rheological behavior of the composite films was studied using compression tests, dynamic mechanical analysis, and scanning electron microscopy (SEM). These analyses suggested first that the microdomain structure of the PEsI-Si component will be formed by the microphase separation between the copolymerization segments with increasing the length of the siloxane segment. Results also suggest that the polymer chains intertwined between the microdomain structure of the PEsI-Si component and the network structure of the epoxy resin component will increase the apparent crosslinking density of the polymer. As a result, the restriction of plastic deformation of the composite film after heating above the <I>T</I><SUB>g</SUB> will be promoted.
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