Synthesis and Physico‐chemical Properties of Copolyesters of 1,1′‐<i>bis</i>(3‐Methyl‐4‐hydroxy Phenyl)cyclohexane with 2,2′‐<i>bis</i>(4‐Hydroxy Phenyl)propane with Terephthaloyl Chloride

Copolyesters were synthesized through the condensation of 0.0025 mol of 1,1 0 -bis(3-methyl-4-hydroxyphenyl)cyclohexane, 0.0025 mol of ethylene glycol/propylene glycol/1,4-butanediol/1,6-hexane diol, and 0.005 mol of terephthaloyl chloride with water/chloroform (4:1 v/v) as an interphase, 0.0125 mol of sodium hydroxide as an acid acceptor, and 50 mg of cetyl trimethyl ammonium bromide as an emulsifier. The reaction time and temperature were 2 h and 08C, respectively. The yields of the copolyesters were 81-96%. The structures of the copolyesters were supported by Fourier transform infrared and 1 H-NMR spectral data and were characterized with the solution viscosity and density by a floatation method (1.1011-1.2697 g/cm 3 ). Both the intrinsic viscosity and density of the copolyesters decreased with the nature and alkyl chain length of the diol. The copolyesters possessed fairly good hydrolytic stability against water and 10% solutions of acids, alkalis, and salts at room temperature. The copolyesters possessed moderate-to-good tensile strength (11-37.5 MPa), good-to-excellent electric strength (19-45.6 kV/mm), excellent volume resistivity (3.8 3 1015 to 2.56 3 10 17 O cm), and high glass-transition temperatures (148-1958C) and were thermally stable up to about 408-4278C in a nitrogen atmosphere; they followed single-step degradation kinetics involving 38-58% weight losses and 34-59% residues. The copolyesters followed 2.6-2.9-order degradation kinetics.

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Synthesis and comparative physicochemical investigation of partly aromatic cardo copolyesters

Joshi

Raja

Parsania

2007

J of Applied Polymer Sci

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Synthesis and Physico‐chemical Properties of Copolyesters of 1,1′‐bis(3‐Methyl‐4‐hydroxy Phenyl)cyclohexane with 2,2′‐bis(4‐Hydroxy Phenyl)propane with Terephthaloyl Chloride

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Synthesis and comparative physicochemical investigation of partly aromatic cardo copolyesters

Synthesis and comparative physicochemical investigation of partly aromatic cardo copolyesters

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