Copolymerization of dehydrated castor oil with styrene: Determination of reactivity ratios | Zendy

Cassidy P. E. | Zendy; Schwank G. D. | Zendy

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Copolymerization of dehydrated castor oil with styrene: Determination of reactivity ratios

Author(s) -

Cassidy P. E.,

Schwank G. D.

Publication year - 1974

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1974.070180830

Subject(s) - comonomer , copolymer , reactivity (psychology) , styrene , polymer chemistry , chemistry , castor oil , benzene , saponification , organic chemistry , medicine , alternative medicine , pathology , polymer

Dehydrated castor oil (DCO) has been used as a comonomer with styrene to determine reactivity ratios. The polymerization was a free‐radical process in benzene, and the product was isolated by evaporation of the reaction mixture and by two precipitations into petroleum ether from benzene. The copolymer composition was determined by a saponification procedure. DCO was found to have a high chain transfer constant and a very low reactivity ratio (estimated at 0.086) compared to styrene (11.6). It was found that copolymerization is difficult to achieve in a system where the DCO concentration in the reaction mixture was above 20 mole‐%.

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