Document Detail

The cationic ring-opening polymerization of tetrahydrofuran with 12-tungstophosphoric acid.
MedLine Citation:
PMID:  20335988     Owner:  NLM     Status:  MEDLINE    
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.
Ahmed Aouissi; Salem S Al-Deyab; Hassan Al-Shahri
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-03-08
Journal Detail:
Title:  Molecules (Basel, Switzerland)     Volume:  15     ISSN:  1420-3049     ISO Abbreviation:  Molecules     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-25     Completed Date:  2010-08-10     Revised Date:  2010-12-15    
Medline Journal Info:
Nlm Unique ID:  100964009     Medline TA:  Molecules     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  1398-407     Citation Subset:  IM    
Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia.
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MeSH Terms
Furans / chemistry*
Magnetic Resonance Spectroscopy
Phosphoric Acids / chemistry*
Polymers / chemistry*
Spectrophotometry, Infrared
Tungsten Compounds / chemistry*
Reg. No./Substance:
0/12-tungstophosphoric acid; 0/Cations; 0/Furans; 0/Phosphoric Acids; 0/Polymers; 0/Tungsten Compounds; 109-99-9/tetrahydrofuran

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