CATIONIC RING-OPENING POLYMERIZATION OF TETRAHYDROFURAN WITH KEGGIN-TYPE HETEROPOLYCOMPOUNDS AS SOLID ACID CATALYSTS

被引：0
|
作者：
Ahmed Aouissi [1 ]
Salim Salem Al-Deyab [1 ]
Hassan Al-Shehri [1 ]
机构：
[1] Chemistry Department,College of Science,King Saud University,Riyadh,KSA
来源：
Chinese Journal of Polymer Science | 2010年 / 28卷 / 03期
关键词：
Tetrahydrofuran; Heteropoly compounds; Ring opening polymerization; Cyclic ether; Solid acid;
D O I：
暂无
中图分类号：
O631.5 [聚合反应、缩聚反应];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Three Keggin-type heteropolyanions,namely H;PMo;O;·13H;O,（NH;）;PMo;O;·4H;O and H;PW;O;·13H;O were prepared and tested in the ring-opening polymerization reaction of tetrahydrofuran.The effects of the counter-cation （H;,NH;） and the peripheral atoms（Mo,W） on the polymerization were investigated.It has been found that when the protons of H;PMo;O;·13H;O were replaced by the ammonium cations the polymerization rate decreased dramatically. Whereas,when the peripheral atoms（Mo） were replaced by their homologous（W）,the polymerization rate increased twofold.As for the viscosity average molecular weight（M;） of polymer products,it was found that the high molecular weight（7930） was obtained by using H;PW;O;·13H;O.The molecular weight（M;） obtained by H;PMo;O;·13H;O and （NH;）;PMo;O;·4H;O was 6470 and 6810,respectively.
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页码：305 / 310
页数：6
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