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Synthesis, characterization, properties, and derivatives of poly(starch‐ g ‐(1‐amidoethylene)). I. Synthesis and characterization
Author(s) -
Meister John J.,
Sha Mu Lan
Publication year - 1987
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.1987.070330601
Subject(s) - starch , aqueous solution , yield (engineering) , chemistry , polymerization , polymer chemistry , molar mass distribution , molecule , monomer , organic chemistry , materials science , polymer , metallurgy
Poly(starch‐ g ‐(1‐amidoethylene)) can be formed by aqueous, free radical polymerization of 2‐propenamide on lintnerized, potato starch. Initiation is by attack of cerium ions (+IV) on the D ‐glucopyranosyl units of starch. The reaction produces a water‐soluble thickener with molecular properties of the product controlled, in part, by the gel effect induced in virtually all syntheses. Yield of product varies from 38 to 100% with yields of 90–100% being common. Products containing less than 50 wt % sidechain were found to be difficult to dissolve once they were recovered from the synthesis mixture. A sample with a design molecular weight of 0.8 × 10 6 and 4 grafts per backbone formed 3.9 wt % of a water‐insoluble solid in the reaction mixture. The solid, which had a composition similar to that of the reaction mixture, may be the result of selective reaction within the distribution of backbone molecules.