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- W1973451182 abstract "Abstract Carbazole units in copolymers can be cross-linked by reaction with a Lewis acid catalyst in methylene chloride. The reaction initially causes gel formation, followed by the development (with BF3. Et2O) of a characteristic blue colour. The blue product has been shown to be a cationic dye of the diaryl—methyl type, derived from the dye base, bis-(9-alkyl-3-carbazolyl)-methane. Acrylic or vinyl ester homopolymers are unaffected by this reaction, and can be extracted from the gel; N-vinyl carbazole homopolymer noticeably accelerates the gel forming reaction by cross-linking with copolymers. A series of free radical copolymerizations of N-vinyl carbazole with methyl acrylate, methyl methacrylate, acrylonitrile and vinyl acetate were conducted in solution at 30°, and the products subjected to this reaction. In no case was any homopolymer formed." @default.
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- W1973451182 date "1968-02-01" @default.
- W1973451182 modified "2023-09-24" @default.
- W1973451182 title "The detection of carbazole units and poly N-vinyl carbazole in copolymers derived from N-vinyl carbazole" @default.
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- W1973451182 doi "https://doi.org/10.1016/0014-3057(68)90014-1" @default.
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