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Four new vanadium substituted Dawson-type heteropoly acids H7[P2Mo17VO62]·39H2O(1), H8[P2Mo16V2O62]·41H2O(2), H9[P2Mo15V3O62]·51H2O(3) and H8[P2Mo14V4O62H2]·45H2O(4) were prepared respec-tively. Their structures were determined by IR and ICP. The inhibition effects of vanadium substituted Dawson-type heteropoly acids(Mo, P) on free radical polymerization of methyl methacrylate(MMA) were investigated by dilatometry. The results show that the rate of the polymerization of MMA decreases and the inhibition effects of the four heteropoly acids reach the inhibitor performance of hydroquinone at a certain ratio.
Four new vanadium substituted Dawson-type heteropoly acids H7 [P2Mo17VO62] · 39H2O (1), H8 [P2Mo16V2O62] · 41H2O (2), H9 [P2Mo15V3O62] · 51H2O (3) and H8 [P2Mo14V4O62H2] · 45H2O respec-tively. Their structures were determined by IR and ICP. The inhibition effects of vanadium substituted Dawson-type heteropoly acids (Mo, P) on free radical polymerization of methyl methacrylate (MMA) were investigated by dilatometry. The results show that the rate of the polymerization of MMA decreases and the inhibition effects of the four heteropoly acids reach the inhibitor performance of hydroquinone at a certain ratio.