Urethanes and polyurethanes from suberin .1. Kinetic study

abstract

Within the context of a study on the preparation and the characterization of polyurethanes based on suberin, as a polyol, and conventional polyisocyanates, it was deemed necessary to carry out a preliminary study on the reactivity of the hydroxy functions of suberin. Aliphatic and aromatic mono- and di-isocyanates were tested and the kinetics of this system followed the classical second order up to conversions of about 85%. The influence of the steric hindrance and the electronic factors, linked to the specific structures of both types of isocyanates, was established. (C) 1997 Elsevier Science B.V.

keywords

BEARING FURAN MOIETIES; CORK

subject category

Agriculture

authors

Cordeiro, N; Belgacem, MN; Gandini, A; Neto, CP

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