A series of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether ketone ketone ether ketone ketone) containing 1,4-naphthylene moieties were prepared by the Friedel-Crafts acylation solution copolycondensation of terephthaloyl chloride (TPC) with a mixture of BPOBN and DPOBPN, over a wide range of BPOBN/DPOBPN molar ratios, in the presence of anhydrous Al[Cl.
Terephthaloyl chloride (TPC, Shuanglin Chemical, Nanchang, China) was purified by distillation under vacuum prior to use.
A series of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether ketone ketone ether ketone ketone) containing 1,4-naphthylene moieties were prepared by electrophilic Friedel-Crafts solution copolycondensation of terephthaloyl chloride (TPC) with a mixture of BPOBN and DPOBPN, over a wide range of BPOBN/DPOBPN molar ratios, as shown in Scheme 2.
Two new series of segmented poly(azomethine)esters were obtained by polycondensation reaction of preformed azomethine diols and diacid chloride, terephthaloyl chloride (T) and isophthaloyl chloride (I), using refluxing solvent, tetrahydrofuran (THF) and a base trimethylamine as a hydrochloric acid acceptor.
Among the polymers based on terephthaloyl chloride, TPE-5 was least stable with T10 at 240 oC and Tmax at 540 oC and TPE-Ar had maximum stability with T10 at 330 oC and Tmax at 470 oC.
The structure- property relationship interm of solubility, WAXRD, thermal studies revealed that the polyesters prepared from terephthaloyl chloride were more thermally stable, compared to those prepared from isophthaloyl chloride due to the presence of p-substituted groups on benzene ring.
Terephthaloyl chloride (99%) (TPC), 6-hydroxy-2-napthoic acid (98%) (HNA).
of terephthaloyl chloride in 20 ml of DMAc solvent was added slowly in an ice bath.
N, N'-Bis(benzoyl) terephthalic acid dihydrazide(NA) was synthesized from benzoyl hydrazine and terephthaloyl chloride which was deprived from terephthalic acid via acylation, and the structures of the synthesized compound had been characterized by Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance techniques.
After cooling to room temperature and evaporation of thionyl dichloride in vacuum, the residue was terephthaloyl chloride [27-29].
Terephthaloyl-bis-(4-oxyhenzoyichloride), 3, was synthesized by treating with excess thionyl chloride, at reflux temperature, of the corresponding dicarboxylic acid that resulted from the reaction of 4-hydroxybenzoic acid (2 mol) with terephthaloyl chloride
(1 mol), according to a method presented in the literature (27); mp.
In a reaction flask equipped with a reflux condenser terephthaloyl chloride