Synthesis and Thermal Properties of Crosslinkable Alternating Poly(aryl ether ketone)s Containing Pendant Phenylethynyl Groups

A series of crosslinkable alternating poly(aryl ether ketone)s containing pendant phenylethynyl groups were synthesized via aromatic nucleophilic substitution reaction.The resultant polymers show good solubility in ordinary organic solvents.The polymers not only underwent thermal crosslink reaction at elevated temperature but also exhibited good thermal stability during thermal cure process.The glass transition temperature of the cured polymers was improved.Furthermore,polymers with different average number molecular weight showed similar glass transition temperature and decomposition temperature.