Selective destruction in alkali solutions of imide and urethane blocks in thermolized samples of copoly(urethane-imide) films
A. L. Didenko,
A. S. Nesterova,
A. M. Kamalov
et al.
Abstract:The selective destruction of urethane and imide units in a copoly(urethane-imide) obtained on the basis of pyromellitic anhydride, 4,4′-oxydianiline, toluene-2,4-diisocyanate, polycaprolactone and containing an increased proportion of imide units was investigated. A sequential destruction was carried out, including preliminary thermolysis of the samples followed by hydrolysis of the film in solutions of potassium oxide hydrate. It is shown that in the process of chemodestruction, imide units are more labile co… Show more
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