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

Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene

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
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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 (Mv) of polystyrene are directly proportional to the acidity strength of the heteropolyanions (H3PW12O40 > H3PMo12O40 > (NH4)3PW12O40 > (NH4)3PMo12O40). The highest yield (68.0%) and Mv (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

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MDPI and ACS Style

Aouissi, A.; Al-Othman, Z.A.; Al-Anezi, H. Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene. Molecules 2010, 15, 3319-3328.

AMA Style

Aouissi A, Al-Othman ZA, Al-Anezi H. Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene. Molecules. 2010; 15(5):3319-3328.

Chicago/Turabian Style

Aouissi, Ahmed; Al-Othman, Zeid Abdullah; Al-Anezi, Holeil. 2010. "Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene." Molecules 15, no. 5: 3319-3328.

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