Abstract
The termination mechanism in the bulk polymerization of styrene and vinyl acetate initiated by α,α′-azobisisobutyronitrile has been investigated. C14-Labelled initiators were employed and activities of samples were determined by internal liquid scintillation counting. Measurements of fractionated and unfractionated polystyrene showed an average of 1.94 and 2.04 tagged fragments per molecule, respectively, and indicated termination by combination at 60 °C. For polyvinyl acetate 1.06 fragments were found per molecule, indicating termination by disproportionation at 60 °C.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
25 articles.
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