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Study on effective parameters on adhesion in segmented polyurethanes

1. Abstract Phase separation in segmented polyurethanes is an important phenomenon, which affects on characteristic properties of polyurethanes. Morphology, formation and distribution of micro-domains (hard segments and soft segments) are effective parameters on interfacial interaction and adhesion of polyurethane system. In this work segmented polyurethanes based on 4,4 -diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BDO) were synthesized and the effect of hard segment content and some additives on lap shear strength and tack of synthesized polyurethanes well defined.