Polymerization of Acrylonitrile Initiated by the System Tetramethyl-2-tetrazene and p-Toluenesulfonic Acid |
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Authors: | K Sugiyama |
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Institution: | Faculty of Engineering , Kinki University Hiro-machi , Kure-shi, Hiroshima, 737-01, Japan |
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Abstract: | The polymerization of acrylonitrile (AN) initiated by tetramethyl-2-tetrazene (TMT) and p-toluenesulfonic acid (TSA) in dimethylformamide (DMF) was studied. The polymerization was confirmed to proceed through a radical mechanism. The initial rate of polymerization R was expressed by the equation: Rp = kTMT]0.6 TSA]0.46 AN]1.35. The overall activation energy for the polymerization was estimated as 20.7 kcal/mole. In the absence of monomer, the reaction of TMT with TSA was also studied kinetically by measuring the evolution of nitrogen. From these results and ESR measurement of the TMT/TSA system, a possible initiation mechanism is proposed. |
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Keywords: | Emulsion copolymerization Latex particles size Styrene Butyl acrylate Water-insoluble initiator Oxidized polypropylene |
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