期刊
HIGH PERFORMANCE POLYMERS
卷 20, 期 3, 页码 348-356出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954008307085443
关键词
poly(sulfoxide-urethane)s; thermal stability; diisocyanates; inherent viscosity
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 PSUa-d were prepared by solution polymerization in dry N,N-dimethylacetamide (DMAc) under gradual heating. In the second process, the PSU1-4 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 PSUa-d and PSU1-4, 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 PSUa-d as determined by differential scanning calorimetry (DSC) were in the range 154-200 degrees C. The 10% weight loss temperatures of the PSUa-d as determined by dynamic thermogravimetric analysis were found to be in the range 235-305 degrees C in argon atmosphere.
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