Copolymerization of cashew NUT shell liquid (CNSL) and phenol by condensation with hexamine

摘要

Cashew Nut Shell Liquid (CNSL) is a naturally occurring phenolic material that has the advantages of low cost and renewable supply.It contains a variety of phenolic compounds with side chains of varying degrees of unsaturation at the meta position.This material can be condensed with formaldehyde to given phenol formaldehyde type resins.In this study copolymers of phenol and CNSL are prepared by condensation with hexamine.This overcomes some disadvantages of CNSL formaldehyde resins by improving mechanical properties and friability.Anhalytical attempts to characterize the product of condensation have not been satisfactory.A more fundamental approach based on separating the CNSL to its components and subsequent condensation is indicated.