The mechanisms and kinetics of the reaction between resorcinol and cinnamaldehyde were studied by means of 13C‐NMR spectroscopy, HPLC, and GPC. In the first step the addition of resorcinol to the double bond and to the carbonyl group of cinnamaldehyde takes place. In the second step of reaction the lower molecular weight oligomers form compounds with groups with molecular weights between 1500 and 2500. The red coloured resin reacts at temperatures above 150°C with crosslinking agents to form an insoluble and highly crosslinked product.
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Žigon et al. (1987) studied this question.
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