engleski

Role of the polyurethane component in the adhesive compositions on the hydrolitic stability of the adhesive

In polyurethanes based on linear polyol, isocyanate and a chain extender, the physical morphology of adhesive seems to play an important role in its overall strength characteristics. The aim of this paper is to examine how the morphology and phase separation of such polyurethane components affect the adhesive properties before and after hydrolysis. It is shown that effective microphase separation and the development of hydrogen-bonded structures, as well as hydrolytic events in the hard segment domains, depends strongly on the adhesive composition. The influence of the environment on polyurethane adhesives can be countered by proper selection of the polyurethane component.

polyurethanes; adhesive properties; morphology; phase separation; hydrogen bonding; hydrolysis

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