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- W2087722251 abstract "A simple method for the synthesis of pH-responding polymers containing barbituric acid moieties is described. The synthesis involves N-methyl-N′-(4-vinylbenzyl) urea (2) preparation and its polymerization in DMF using AIBN as the initiator to give poly(N-methyl-N′-(4-vinylbenzyl)urea) (4) with a number average molecular weight of 4.9×105 as determined by GPC. Cyclocondensation of urea with malonic acid in acetic acid/acetic anhydride affords the polymer (5) with pendant barbituric moieties. The pH-responding behavior of polymer 5 in water indicates that it has excellent pH-sensitivity at pH 6∼7. The potential and the versatility of this work are exciting and include the potential preparation of water-soluble polymers by modification of polyureas, metal chelating materials, and “smart” hydrogels upon crosslinking." @default.
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- W2087722251 date "2001-01-01" @default.
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- W2087722251 title "Synthesis of a novel pH-responding polymer with pendant barbituric acid moieties" @default.
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