Yi. Puzin et al., Quantitative determination of phthalides in molecules of vinyl polymers and their role in radical polymerization, RUS J AP CH, 74(2), 2001, pp. 292-297
The applicability to vinyl polymers of the procedure for quantitative deter
mination of phthalide groups in polymeric molecules from the color of their
sulfuric acid Solutions was examined. The correlation between the intensit
y of the color of sulfuric acid solutions of polymers (polymethyl methacryl
ate, polystyrene) and the content of phthalide fragments incorporated into
the polymer molecule was studied systematically on a quantitative level.