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• Al-Deyab, S
• Al-Shahri, H
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• Al-Deyab, S
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• Al-Deyab, S
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Molecules 2010, 15(3), 1398-1407; doi:10.3390/molecules15031398

Article

The Cationic Ring-Opening Polymerization of Tetrahydrofuran with 12-Tungstophosphoric Acid

Ahmed Aouissi* , Salem S. Al-Deyab and Hassan Al-Shahri

Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia

* Author to whom correspondence should be addressed.

Received: 8 January 2010; in revised form: 4 February 2010 / Accepted: 1 March 2010 / Published: 8 March 2010

Download PDF Full-Text [226 KB, uploaded 8 March 2010 12:16 CET]

Abstract: The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 ºC was catalyzed by H₃PW₁₂O₄₀·13H₂O as solid acid catalyst. The effect of the proportions of acetic anhydride and catalyst, reaction time and support on the polymerization reaction was investigated. It has been found that the yield and the viscosity of the polymer depend on the proportion of acetic anhydride, the presence of the latter in the reactant mixture being required for the ring-opening. The catalytic activity of the alumina-supported heteropolyacid results showed that Brønsted acid sites are more effective than Lewis ones for the cationic ring-opening polymerization.

Keywords: cationic polymerization; cyclic ethers; heteropolyacid; tetrahydrofuran; Ring-opening

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