Ultraviolet Curing Mechanism of Cardanol and Properties of Cured Product

The ultraviolet curing reaction of cardanol without photo initiator was studied.The UV curing mechanism and the properties of cured film were determined by IR、UV、GPC and(elemental) analysis.Results show that the ultraviolet curing of cardanol is produced by oxidative polymerization of side chain and condensation reaction of benzene aroused by free-radicals which are de-protonated orth-para hydroxyl group.Physical properties,resistance against organic solvent and chemical medium,thermal stability and effect of exposure time on gloss loss of the UV-cured film of cardanol are better than those of anacardol aldehyde condensation polymer.