Progress in synthesis and application of segmented polymers

Abstract

Selected examples are presented to illustrate basic concepts and recent development in the synthesis and application of segmented polymers. Segmented reactive liquid rubbers, containing an immiscible silicone segment flanked by two miscible oligo(caprolactone) segments, are efficient epoxy toughening agents. In such nano-phase-separated silicone-modified IPNs impact strength is improved without sacrificing dimensional stability. Compatibilized blends of segmented phenolic polyurethane and nitrile liquid rubbers produce rubber blend microphases diepersed in epoxy prepregs which are used to bond aluminum sheets in structural laminates