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Abstract
Synthesis of poly(acrylamidoxime) and polyacrylic acid from polyacrylonitrile performed with different crosslinking grasdes 2,5 and 10wt% divinylbenzene, use of demethylbenzoate and diocty1 phthalated as pore producing solvent. Studies occureed on natural diluted rare earth elements(REEs) contains impurities .