Effect of Some Inorganic Salts on Methyl Methacrylate and Acrylonitrile in Dimethylformamide

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A polarometric titration was utilized to determine the extent to which the monomers methyl methacrylate and acrylonitrile complex with inorganic salts in dimethylformamide solution. No complexes were obtained with the nitrates of sodium, potassium, cesium, and lead. Evidence for 1: 1 complexes between acrylonitrile and LiCl, LiNO3, Mg(NO3)2 · 6H2O, FeCl2 · 4H2O, FeCl3 · 6H2O, MnCl2 · 4H2O, Co(NO3)2 · 6H2O, Ni(NO3)2 · 6H2O, and ZnCl2 and between methyl methacrylate and LiNO3, La(NO3)3 · 6H2O, MnCl2 · 4H2O, FeCl3 · 6H2O, Co(NO3)2 · 6H2O, and ZnCl2 was obtained. A 1: 2 (salt/monomer) complex was also indicated between acrylonitrile and MnCl2 · 4H2O, FeCl3 · 6H2O, Co(NO3)2 · 6H2O, and Ni(NO3)2 · 6H2O and between methyl methacrylate and MnCl2 · 4H2O. Although the presence of certain salts influenced the co-polymerization of methyl methacrylate and acrylonitrile, particularly at high temperatures, the existence of a complex was not an a priori indication of unusual copolymerization behavior. Tacticities of all poly (methyl methacrylate) samples were determined by NMR spectroscopy and were found to be uninfluenced by the salts. © 1968, Taylor & Francis Group, LLC. All rights reserved.

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Journal of Macromolecular Science: Part A - Chemistry