Studies on the copolymer composition of sulphur dioxide and phenylacetylene

The polysulphone copolymers synthesized from the copolymerization of liquid sulphur dioxide and phenylacetylene in the presence of tert-butyl hydroperoxide at low temperature always have an alternating structure which is independent of solvent, temperature and feed ratio. At a relatively high temper...

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Bibliographic Details
Published in:Polymer (Guilford) 1987-11, Vol.28 (12), p.2139-2144
Main Authors: Tsonis, C.P., Ali, S.A., Hwang, J.S.
Format: Article
Language:English
Subjects:
alternating copolymerization
Applied sciences
Exact sciences and technology
Organic polymers
phenylacetylene
Physicochemistry of polymers
Properties and characterization
reaction conditions
Structure, morphology and analysis
sulphur dioxide
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Summary:The polysulphone copolymers synthesized from the copolymerization of liquid sulphur dioxide and phenylacetylene in the presence of tert-butyl hydroperoxide at low temperature always have an alternating structure which is independent of solvent, temperature and feed ratio. At a relatively high temperature (50°C) the phenylacetylene SO 2 system initiated by AIBN gave copolymers with a 1:1 mole ratio, whereas styrene SO 2 under the same conditions produced copolymers with 2:1 molar ratio. The free radical initiators hydrogen peroxide, m-chloroperbenzoic acid, and diphenyl peroxide were inert at low temperatures. The PhC CH SO 2 system with (CH 3) 3COOH at low temperature is more reactive than PhCH CH 2 SO 2 but with AIBN at high temperature the reactivities are reversed. These observations suggest that different mechanisms should operate on the two systems.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(87)90055-3