• Abstract
• Full-Text PDF [233 KB]

• Article Statistics
• PubMed/Medline
• Google Scholar
• Order Reprints

• Cite this article
• Export to BibTeX
• Export to EndNote

• [+] on DOAJ
• Aouissi, A
• Al-Othman, Z
• Al-Anezi, H
• [+] on Google Scholar
• Aouissi, A
• Al-Othman, Z
• Al-Anezi, H
• [+] on PubMed
• Aouissi, A
• Al-Othman, Z
• Al-Anezi, H

•  CiteULike
•  Facebook
•  Mendeley
•  Twitter

This article is

• freely available
• re-usable

Molecules 2010, 15(5), 3319-3328; doi:10.3390/molecules15053319

Article

Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene

Ahmed Aouissi* , Zeid Abdullah Al-Othman and Holeil Al-Anezi

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

* Author to whom correspondence should be addressed.

Received: 13 April 2010; in revised form: 28 April 2010 / Accepted: 29 April 2010 / Published: 5 May 2010

Download PDF Full-Text [233 KB, uploaded 5 May 2010 10:13 CEST]

Abstract: The two heteropolyacids H₃PW₁₂O₄₀ and H₃PMo₁₂O₄₀, and their homologous salts (NH₄)₃PW₁₂O₄₀, and (NH₄)₃PMo₁₂O₄₀ were prepared and tested in the cationic polymerization of styrene. The results showed that the heteropolytungstates were more reactive than the heteropolymolybdates. It has been found that the yield and the viscosity averagemolecular weight (M_v) of polystyrene are directly proportional to the acidity strength of the heteropolyanions (H₃PW₁₂O₄₀ > H₃PMo₁₂O₄₀ > (NH₄)₃PW₁₂O₄₀ > (NH₄)₃PMo₁₂O₄₀). The highest yield (68.0%) and M_v (7,930) were obtained by using H₃PW₁₂O₄₀. In addition, H₃PW₁₂O₄₀ polymerized the styrene under mild conditions and was recyclable, and could behave as a truly heterogeneous catalyst.

Keywords: heteropoly compounds; cationic polymerization; polystyrene; solid acid

Article Statistics

Cite This Article