Synthesis and Characterization of Novel Poly(sulfoxide-urethane)s from 2,2'-Sulfoxidebis(4-methyl phenol) with Various Diisocyanates

Abstract

A series of novel poly(sulfoxide-urethane)s (PSUs) with enhanced thermal stability and good solubility were prepared by two different processes from 2,2^' -sulfoxide bis(4-methyl phenol) with commercially available diisocyanates. In the first process the PSU_a-d were prepared by solution polymerization in dry N,N-dimethylacetamide (DMAc) under gradual heating. In the second process, the PSU_1-4 were synthesized under reflux conditions. The resulting polymers exhibited inherent viscosities in the range of 0.19—1.10 dL g^-1 and 0.13—0.79 dL g^-1 for PSU_a-d and PSU_1-4, respectively. All of the polymers were characterized by Fourier transform infra-red spectroscopy and elemental analyses. The PSUs exhibited a good solubility in a variety of polar solvents. The glass transition temperatures of the PSU_a-d as determined by differential scanning calorimetry (DSC) were in the range 154—200³C. The 10% weight loss temperatures of the PSU_a-d as determined by dynamic thermogravimetric analysis were found to be in the range 235—305³C in argon atmosphere.

Keywords

poly(sulfoxide-urethane)s thermal stability diisocyanates inherent viscosity

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