The cationic ring-opening polymerization of tetrahydrofuran with 12-tungstophosphoric acid

The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 degrees C was catalyzed by H3PW12O40 x 13 H2O 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 foun...

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Published inMolecules (Basel, Switzerland) Vol. 15; no. 3; pp. 1398 - 1407
Main Authors Aouissi, Ahmed, Al-Deyab, Salem S, Al-Shahri, Hassan
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 08.03.2010
Molecular Diversity Preservation International
Subjects
Acids
Catalysis
cationic polymerization
Cations
cyclic ethers
Furans - chemistry
heteropolyacid
Kinetics
Magnetic Resonance Spectroscopy
Oxygen
Phosphoric Acids - chemistry
Polymerization
Polymers
Polymers - chemistry
Ring-opening
Spectrophotometry, Infrared
tetrahydrofuran
Thermogravimetric analysis
Tungsten Compounds - chemistry
Viscosity
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Summary:The cationic ring-opening polymerization reaction of tetrahydrofuran at 20 degrees C was catalyzed by H3PW12O40 x 13 H2O 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.
Bibliography:ObjectType-Article-1
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules15031398