Authors: Zhimin Li Gang Zhang Yan Li Jie Yang
Publish Date: 2015/04/13
Volume: 22, Issue: 5, Pages: 75-
Abstract
The homo and copolypphenyene ether sulfone benzimidazole/sulfide sulfone benzimidazoles PESI/PPSSI had been prepared by solution polycondensation of the mixtures of 44′dicarboxydiphenyl ether DCDPE and 44′dicarboxydiphenyl sulfide DCDPS with 33′44′tetraanmino diphenyl sulfone TADS in polyphosphoric acid PPA The FTIR 1HNMR DSC TGA XRD were used to characterize chemical structure and thermal stabilities of the resultant homo and copolymers The inherent viscosities of the resultant polymers were in the range of 0621–0982 dl/g at the polymer concentration of 05 They were found to have excellent thermal properties with glass transition temperatures Tg of 386–393 °C 5 weightloss temperature T5 of 512–525 °C These polymers showed amorphous nature as charactered by XRD Most importantly the resultant polymers possess good solubility that they can be soluble in various aprotic solvents such as Nmethyl2pyrolidinone NMP dimethyl sulfoxide DMSO and 13dimethyl2imidazolidinone DMI and they could be easily formed transparent tough and flexible membranes by solution casting method The membranes showed good mechanical properties the tensile strengths and Young’s Modulus were in the range of 688–986 MPa and 21–28 GPa respectively
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