Synthesis and Physico-chemical Study of Copoly(ester-sulfonate) of 1,1'-BIs(3-methyl-4- hydroxy phenyl) cyclohexane, Isophthaloyl chloride and 4,4'-Diphenyl disulfonyl chloride

摘要

Copoly(ester-sulfonate) (CPMCDI) of 1,1'-bis(3-methyl-4-hydroxy phenyl) cyclohexane (5mmol), isophthaloyl chlorlde(2.5mmol) and 4,4'-diphenyl disulfonyl chloride(2.5 mmol) has been synthesized by interfacial polycondensation technique at 5°G for 31/2h using water-1,2-dichloroethane(50:12.5 ml) as diphasic system, alkali (0.015 mol) as an acid acceptor and cetyltrimethyl ammonium bromide (CTAB)(110mg) and sodium lauryl sulfate (SLS) (20mg) as mixed emulsifiers. CPMCDI is characterized by solubility, IR and NMR spectroscopic techniques, viscosity in four different solvents at 30 °C, molecular weight by GPC (M_w- 2.5 × 10~4, M_n =0.87×10~4, M_w/M_n) and density (1.2644 g/cm~3) by flotation method. A 0.10 mm thick CPMCDI film has 17.4 MPa tensile strength, 30kV/mm electric strength at 27°G and 8.7 × 10~(11) Ω cm volume resistivity at 25°C. CPMCDI possesses fairly good hydrolytic stability against water, acids, alkalis and salts at 35°C, high T_g (183°C) and good thermal stability (325°C).