Abstract
AbstractPolyurethanes prepared by reaction of 4,4′‐diphenylmethane diisocyanate with poly(ethylene adipate) were crosslinked with allophanate and isocyanurate groups. Their thermal properties were studied by isothermal and nonisothermal thermogravimetry. It has been found that there is no correlation between the initial decomposition temperature and the concentration of crosslinks. The rate of mass loss decreases with crosslinking density for polyurethanes crosslinked with more than 50 mole‐% excess of diisocyanate.
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