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Cation exchange resin from phosphorylated N ‐vinylcarbazole formaldehyde copolymer
Author(s) -
Biswas Mukul,
Bagchi Subrata
Publication year - 1984
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1984.070291210
Subject(s) - copolymer , formaldehyde , ion exchange , thermal stability , polymer chemistry , salt (chemistry) , chemistry , titration , ion exchange resin , anhydrous , materials science , inorganic chemistry , ion , organic chemistry , polymer
Crosslinked copolymers of N ‐vinylcarbazole and poly N ‐vinylcarbazole) and formaldehyde have been phosphorylated using PCl 3 and anhydrous AlCl 3 under different conditions. The cation exchange resins, thus obtained, have been characterized by elemental analyses, evaluation of total ion‐exchange capacities and salt‐splitting capacities, pH metric titration behavior, and IR analysis. The phosphorylated resin exhibites significantly better thermal stability than the corresponding sulfonated N ‐vinylcarbazole–formaldehyde cation exchange resin or the unmodified N ‐vinylcarbazole–formaldeyde copolymer, as well as the phosphorylated poly( N ‐vinylcarbazole). The phosphorylated resins also behave as polymeric dyes with pH dependent color change. Possible explanations for color change and ion‐exchange capacity differences have been attempted on the basis of the structural characteristics of the resins.