Reactivity of Heteropolymolybdates and Heteropolytungstates in the Cationic Polymerization of Styrene

被引：14
|
作者：
Aouissi, Ahmed [1 ]
Al-Othman, Zeid Abdullah [1 ]
Al-Anezi, Holeil [1 ]
机构：
[1] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia
来源：
MOLECULES | 2010年 / 15卷 / 05期
关键词：
heteropoly compounds; cationic polymerization; polystyrene; solid acid; HETEROGENEOUS CATALYSIS; SOLID-STATE; ACIDS; MOLYBDENUM; HETEROPOLYACIDS; TUNGSTEN; SALTS;
D O I：
10.3390/molecules15053319
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
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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页码：3319 / 3328
页数：10
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