Photo‐crosslinkable polymers with benzylideneacetophenone (chalkone) structure in the side chains

摘要

AbstractFour soluble types of polymers have been synthesized by grafting 4‐ and 4′‐chalkonyl glycidyl ethers onto an aromatic polyamine (aniline–formaldehyde linear resin) and a polyamide (condensation product of dimerized linseed oil and an aliphatic polyamine) to obtain photo‐crosslinkable chalkone structure in the side chains which are also expected to contain one OH group each. The completion of grafting reactions has been followed by the disappearance of the epoxide absorption around 918 cm−1. The characterization of the resins was done by melting point, solubility, and IR measurements. Irradiation was carried out with a 100‐watt Hanovia high‐pressure mercury are lamp. Irradiated samples were studied by UV spectral measurements and their insolubility in CHCl3. It was observed that polymers grafted with 4′‐chalkonyl glycidyl ether possibly undergo both isomerization and crosslinking reactions under UV irradiation while those grafted with 4‐chalkonyl glycidyl ether undergo crosslinking