Citation: Ahmed Aouissi, Salim Salem Al-Deyab, Hassan Al-Shehri. CATIONIC RING-OPENING POLYMERIZATION OF TETRAHYDROFURAN WITH KEGGIN-TYPE HETEROPOLYCOMPOUNDS AS SOLID ACID CATALYSTS[J]. Chinese Journal of Polymer Science, ;2010, 28(3): 305-310. doi: 10.1007/s10118-010-9007-z shu

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

Received Date: 7 January 2009
Revised Date: 21 February 2009

Three Keggin-type heteropolyanions, namely H3PMo12O4013H2O, (NH4)3PMo12O404H2O and H3PW12O4013H2O were prepared and tested in the ring-opening polymerization reaction of tetrahydrofuran. The effects of the counter-cation (H+, NH4+) and the peripheral atoms (Mo, W) on the polymerization were investigated. It has been found that when the protons of H3PMo12O4013H2O 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 (Mv) of polymer products, it was found that the high molecular weight (7930) was obtained by using H3PW12O4013H2O. The molecular weight (Mv) obtained by H3PMo12O4013H2O and (NH4)3PMo12O404H2O was 6470 and 6810, respectively.
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