Polymer-Supported Lewis Acid Catalysts. II. Cationic Polymerization of α-Methylstyrene with Polystyrene-Gallium Trichloride Complex as Initiator
- 1 August 1988
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science: Part A - Chemistry
- Vol. 25 (8) , 907-922
- https://doi.org/10.1080/00222338808052129
Abstract
The polymerization of α-methylstyrene catalyzed by a polymer-supported Lewis acid catalyst, polystyrene-gallium trichloride complex, is described. The kinetic equation of the cationic polymerization is Rp = k˙Cms˙Ccat , and the apparent activation energy is 20.9 kJ/mol. The effect of different solvents on the polymerization rate is quite pronounced; for example, the polymerization rate decreased in the following order in the three solvents: CH2 ClCH2 Cl < CH2 Cl2 < CCl4. High molecular weight poly(α-methylstyrene) (Tg = 185°C) could be obtained at room temperature. The mechanism of the polymerization is also discussed.Keywords
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