Synthesis and characterization of copolysulfonate of 1,1′-bis(3-methyl-4-hydroxyphenyl)cyclohexane, bisphenol-A, and 4,4′-diphenyl disulfonyl chloride

Copolysulfonate (CPMCAD) of 1,1′-bis(3-methyl-4-hydroxyphenyl)cyclohexane (0.0025 mol), bisphenol-A (0.0025 mol), and 4,4′-diphenyl disulfonyl chloride(0.005 mol) has been synthesized by interfacial polycondensation technique at 5 °C for 4 h using water-1,2-dichloroethane (50:12.5 ml) as an interphase, alkali (0.015 mol) as an acid acceptor, and cetyl trimethyl ammonium bromide (100 mg) as an emulsifier. CPMCAD is characterized by solubility, infrared (IR) and nuclear magnetic resonance (NMR) spectroscopic techniques, viscosity in two different solvents at 30 °C, molecular weight and molecular weight distribution by gel permeation chromatograph , , ), and density (1.3024 g cm−3) by floatation method. A 0.10 mm thick CPMCAD film has 15.56 ± 1.26 MPa tensile strength, 30 kV/mm electric strength at 27 °C, and 6.5 × 1013 Ω-cm volume resistivity at 25 °C. CPMCAD possesses good hydrolytic stability against water, acids, alkali, and salt solutions at 35 °C, good T g (166.2 °C), and excellent thermal stability (315 °C).