POLYARYLENE SULFIDES WITH POLAR BRIDGE GR OUPS IN THE MAIN-CHAIN

The phase state, thermal, dynamic mechanical, and other characteristic s of two new polyarylene sulfides, namely, poly(1,4-phenylene sulfide sulfone) and poly(1,4-phenylene sulfide ketone), containing the sulfon e or ketone groups between 1,4-substituted benzene rings in their main chain, which alternate regularly with the sulfide bridges, were studi ed in comparison with poly(1,4-phenylene sulfide). It was established that the introduction of polar bridge groups into the chain of poly(1, 4-phenylene sulfide) increases substantially the glass transition poin t of the polymer and provides conditions for preparing polymers with v arious supramolecular structures, solubility, and thermal characterist ics. Alternation of the S- and CO-bridges does not interfere with crys tallization of the polymer, while the incorporation of the SO2 groups in the chain of poly(1,4-phenylene sulfide) gives an amorphous polymer crystallization of which is either difficult or unfeasible at all.