Abstract
A study has been conducted to determine the effects of added elastomers on the film properties of a linear aromatic polyimide. Polyamic acids have been prepared via reaction of BTDA (3,3′,4,4′-benzophenone tetracarboxylic acid dianhydride) with ODA (4,4′-oxydianiline) and various ATBN (aromatic amineterminated butadiene acrylonitrile) elastomers. Films were prepared and thermally converted to the corresponding polyimides. Optimum cure conditions for BTDA + ODA/ATBN films were evaluated. The effect of elastomer concentration on BTDA + ODA thermal properties, density, tensile properties, morphology and tear resistance were evaluated. Variation of the acrylonitrile content of the ATBN elastomer in BTDA + ODA was performed and properties evaluated. Incorporation of ATBN into BTDA + ODA caused a decrease in the glass transition temperature, thermal stability, tensile strength and modulus of films. Increases of film tear resistance were observed for several formulations of ATBN in the BTDA + ODA polyimide.
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