The cationic polymerization of α-methylstyrene in liquid sulfur dioxide initiated by the HI/I2 system |
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| Authors: | Marcia G Oliveira Ana C F Moreira B G Soares |
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| Affiliation: | (1) Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro, Centro de Tecnologia, P.O. Box 68525, RJ, Brasil, 21945-970, BR |
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| Abstract: | The polymerization of α-methylstyrene (αMeSty) initiated by HI/I2 or HI in the presence of liquid sulfur dioxide has been investigated. The number-average molecular weight increased with
the monomer concentration for reactions initiated by the HI/I2 system. I2 also participates in the initiation process, increasing the number-average polymer chain at higher monomer concentration.
HI alone is also able to initiate the polymerization of αMeSty in the presence of SO2. With this initiator, transfer reaction can be minimized in systems containing low amount of SO2.
Received: 19 December 1996/Revised: 27 January 1997/Accepted 29 January 1997 |
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