Copolymerization data involving a wide variety of monomers containing methylenic double bonds led to the conclusion that only acrylonitrile exhibited repulsive effects between adding monomer and copolymer containing higher proportions of the same monomer. Employing a modified procedure based on the Barb equation r1 and r1′ values were determined for the following systems: methyl α‐chloroacrylate‐vinylidene cyanide, methyl methacrylate‐vinylidene cyanide, acrylic acid‐vinylidene cyanide, 2,5‐dichlorostyrene‐vinylidene cyanide, vinylidene chloride‐vinylidene cyanide, and 2‐chlorobutadiene‐vinylidene cyanide. These results confirm the predicted diversions from normal copolymerization behavior of vinylidene cyanide as well.
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George E. Ham (1957) studied this question.
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