Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene

The two heteropolyacids H(3)PW(12)O(40) and H(3)PMo(12)O(40), and their homologous salts (NH(4))(3)PW(12)O(40), and (NH(4))(3)PMo(12)O(40) were prepared and tested in the cationic polymerization of styrene. The results showed that the heteropolytungstates were more reactive than the heteropolymolybd...

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Autores principales: Aouissi, Ahmed, Al-Othman, Zeid Abdullah, Al-Anezi, Holeil
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2010
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6257479/
https://www.ncbi.nlm.nih.gov/pubmed/20657482
http://dx.doi.org/10.3390/molecules15053319
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author Aouissi, Ahmed
Al-Othman, Zeid Abdullah
Al-Anezi, Holeil
author_facet Aouissi, Ahmed
Al-Othman, Zeid Abdullah
Al-Anezi, Holeil
author_sort Aouissi, Ahmed
collection PubMed
description The two heteropolyacids H(3)PW(12)O(40) and H(3)PMo(12)O(40), and their homologous salts (NH(4))(3)PW(12)O(40), and (NH(4))(3)PMo(12)O(40) 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 average molecular weight (M(v)) of polystyrene are directly proportional to the acidity strength of the heteropolyanions (H(3)PW(12)O(40) > H(3)PMo(12)O(40) > (NH(4))(3)PW(12)O(40) > (NH(4))(3)PMo(12)O(40)). The highest yield (68.0%) and M(v) (7,930) were obtained by using H(3)PW(12)O(40). In addition, H(3)PW(12)O(40) polymerized the styrene under mild conditions and was recyclable, and could behave as a truly heterogeneous catalyst.
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spelling pubmed-62574792019-01-02 Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene Aouissi, Ahmed Al-Othman, Zeid Abdullah Al-Anezi, Holeil Molecules Article The two heteropolyacids H(3)PW(12)O(40) and H(3)PMo(12)O(40), and their homologous salts (NH(4))(3)PW(12)O(40), and (NH(4))(3)PMo(12)O(40) 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 average molecular weight (M(v)) of polystyrene are directly proportional to the acidity strength of the heteropolyanions (H(3)PW(12)O(40) > H(3)PMo(12)O(40) > (NH(4))(3)PW(12)O(40) > (NH(4))(3)PMo(12)O(40)). The highest yield (68.0%) and M(v) (7,930) were obtained by using H(3)PW(12)O(40). In addition, H(3)PW(12)O(40) polymerized the styrene under mild conditions and was recyclable, and could behave as a truly heterogeneous catalyst. MDPI 2010-05-05 /pmc/articles/PMC6257479/ /pubmed/20657482 http://dx.doi.org/10.3390/molecules15053319 Text en © 2010 by the authors; licensee MDPI, Basel, Switzerland. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Aouissi, Ahmed
Al-Othman, Zeid Abdullah
Al-Anezi, Holeil
Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene
title Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene
title_full Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene
title_fullStr Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene
title_full_unstemmed Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene
title_short Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene
title_sort reactivity of heteropolymolybdates and heteropolytungstates in the cationic polymerization of styrene
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6257479/
https://www.ncbi.nlm.nih.gov/pubmed/20657482
http://dx.doi.org/10.3390/molecules15053319
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