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The bisphenol 4,4Љ-dihydroxy-5Ј-phenyl-m-terphenyl (4), containing a 1,3,5-triphenylbenzene moiety, was synthesized from a pyrylium salt obtained by the reaction of benzaldehyde with p-methoxyacetophenone with boron trifluoride etherate as a condensing agent. Polymers were obtained from 4 by a nucleophilic displacement reaction with various activated difluoro monomers and with K 2 CO 3 as a base. A series of new poly(arylene ether)s (8a-8f) were obtained that contained phenyl-substituted m-terphenyl segments in the polymer chain. Polymers with inherent viscosities of 0.41-0.99 dL/g were obtained in yields greater than 96%. The polymers were soluble in a variety of organic solvents, including nonpolar solvents such as toluene. Clear, transparent, and flexible films cast from CHCl 3 showed high glass-transition temperatures (T g ϭ 198 -270°C) and had excellent thermal stability, as shown by temperatures of 5% weight loss greater than 500°C. 4 was converted via N,N-dimethyl-Othiocarbamate into the masked dithiol 4,4Љ-bis(N,NЈ-dimethyl-S-thiocarbamate)-5Јphenyl-m-terphenyl and was polymerized with activated difluoro compounds in the presence of a mixture of Cs 2 CO 3 and CaCO 3 as a base in diphenyl sulfone as a solvent. A series of new poly(arylene thioether)s (9a-9e) were obtained with T g values similar to those of 8a-8e. 9a-9e were further oxidized into poly(arylene sulfone)s with T g values 40 -80°C higher than those for 8a-8e and 9a-9e. These polymers also had good solubility in organic solvents. A sulfonic acid group was selectively introduced onto the pendent phenyl group of polymers 8a and 8f by reaction with chlorosulfonic acid. The polymers were soluble in dipolar aprotic solvents and formed films via casting from dimethylformamide. Polymers 8a-8f, 11a, and 11f showed blue and red fluorescence under ultraviolet-visible light with emission maxima at 380 -440 nm.

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Macromol. Chem. Phys. I%, 715 -722 (I995) 715Sequence ordered copoly(ary1ester-carbonate)s: synthesis and c h a r a c t e r i z a t i o n a ) SUMMARY A ney class of ester-carbonate monomers was prepared by reaction of monomethylcarbonate of bisphenol-A with tere-/isophthaloyl chloride. Self polycondensation of these monomers in presence of titanium tetraisopropoxide as catalyst resulted in the formation of copoly(ary1-ester-carbonate)s having an ester to carbonate ratio of 2 : 1. Copoly(ary1ester-carbonate)s rich in either ester or carbonate groups were also prepared by copolymerization of ester-carbonate monomer with dimethyl terephthalate and the bismethylcarbonate of bisphenol-A. The polymer structure was established by 'H NMR and IR spectroscopy. The ordered sequence of estercarbonate groups in the polymer was established by 13C NMR spectroscopy.