Abstract
The molecular and compositional heterogeneity of polyampholytes formed by acrylic acid and 2-methyl-5-vinylpyridine having various compositions and molecular masses have been assessed by spectroturbidimetric titration. Fractionation of the copolymers has been carried out in the system methanol-toluene. It has been established that, in the system methanol-diethyl ether, precipitation of the copolymers occurs principally with respect to composition and, in the system methanol-toluene, with respect to molecular mass.
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