{'fraction_non_alphanumeric': 0.043209876543209874, 'fraction_numerical': 0.009259259259259259, 'mean_word_length': 6.050724637681159, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Synthesis and characterization of novel poly(aryl ether-ketone)s containing naphthalene ring random copolymers.

A series of random copolymers compsed of poly(ether ketone ether ketone ketone) and poly(ether ketone ether ketone ketone) containing naphthalene ring in the main chain were synthesized by low-temperature solution copoly-condensation of 4,4′-di(α-naphthoxy)benzophenone (DNBP) with 4,4′-diphenoxy benzophenone(DPOBP)and terephthaloyl chloride(TPC)in a catalyst/solvent system of AlCl 3/ClCH 2CH 2Cl/NMP.The effects of monomer molarity and reaction time on copolymer molecular weight were studied.Copolymers thus obtatined were characterized by I R,DSC,TG,WAXD etc.The results indicate that the random copolymers display high temperature-resistance and good chemical-resistance.Raising DNBP content in the copolymer increases the Tg of copolymer,but decrease its Tm and crytallinity.The copolymers are semi-crystalline when the content of DNBP is below 30mol%.