Recent advances in thermosetting polyimides

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Abstract
Addition type imide resins are finding increased use as matrix resins for advanced composites. Many different chemical approaches have been used to synthesize imide resins which are easy to process (similar to epoxies) but higher in temperature resistance. This paper outlines recent advances in thermosetting imide resin chemistry; however, only those concepts which have been accepted by the industry and the most promising research concepts are discussed, such as: endomethylenetetrahydrophthalimides acetylene terminated polyimides bismaleimides benzocyclobutenes. Of these, the bismaleimides are easiest to process. When used in combination with comonomers such as bisallylphenyl compounds, bis‐o‐(propenylphenoxy)‐benzophenones, benzocyclobutenes, etc., their toughness can be improved significantly to make them prime candidates as matrices for advanced composites and adhesives.

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