Synthesis and Properties of a Novel Crosslinkable Poly (aryl ether ketone) Containing Naphthalene Group on a Side Chain

A novel crosslinkable poly(arylene ether ketone) s (PAEK) with naphthalene pendant was prepared from carboxyl-containing PAEK precursor and naphthalenol by graft reaction. The structures of the polymer before and after grafted were confirmed by FTIR and H-1 NMR spectroscopy. These polymers exhibited good solubility in common organic solvents, such as dimethyl sulfoxide (DMSO), N, N-dimethylacetamide (DMAc), tetrahydrofuran (THF) and chloroform, and could be casted into flexible and transparent films. However, after thermally cross-linked at 170 degrees C for 2 h at air atmosphere, the resulting cross-linked polymer exhibited good chemical resistance, insoluble in above organic solvents. In addition, the cross-linked polymers displayed high thermal stability. The glass transition temperature (T-g) and thermal weight loss temperature were obviously increased respectively.