Acrylonitrile Copolymerizations. IV. Butadiene Copolymerization |
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Authors: | J Vialle J Guillot A Guyot |
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Institution: | C.N.R.S. Institut de Recherches sur la Catalyse Lyon , Villeurbanne, France |
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Abstract: | The kinetics of the acrylonitrile–butadiene radical copolymerization, carried out in solution at 60°C, have been followed using gas chromatographic analysis. Remote units effects are observed only on the butadiene-ended radicals but they seem to involve a quite long sequence of butadiene units. The following values of the reactivity ratios are proposed: rA = 0.067, rAB = 0.70, rABB = 0.66, rABB = 0.17,rBi → 001 to 0-06 for large values of L The results are discussed in terms of either polarity effects, or differences in reactivities between 1,4- or 1,2-butadiene radicals, or finally of charge transfer complexes between the monomers. |
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