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Starch graft polymers. I. Graft Co‐ and terpolymers of starch with 2‐hydroxy‐3‐methacryloyloxypropyl‐trimethylammonium chloride and acrylamide: Preparation and evaluation as silica depressants
Author(s) -
Jones Duane A.,
Jordan Wesley A.
Publication year - 1971
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.1971.070151013
Subject(s) - starch , acrylamide , copolymer , beneficiation , polymer , monomer , polymerization , polymer chemistry , chemistry , chloride , grafting , nuclear chemistry , chemical engineering , organic chemistry , engineering
The title monomers have been grafted onto wheat starch by γ‐radiation‐induced polymerization in water providing three graft polymers containing poly[2‐hydroxy‐3‐methacryloyloxypropyltrimethylammonium chloride (I)] and two graft polymers containing poly[I and acrylamide (II)]. Characterization is discussed together with their utility as silica depressants in flotation‐beneficiation of siliceous ores. Results are provided to illustrate that a starch graft copolymer containing 15% poly(I) graft and a graft terpolymer containing 30% poly(I, II) in the ratio 1:2 are effective as selective depressants for silica in flotation‐beneficiation of Florida pebble phosphate ore using special flotation conditions.