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The Structure and Aggregation of Hydrogen‐Bonded Interpolymer Complexes of Poly(acrylic acid) With Poly( N ‐vinylpyrrolidone) in Dilute Aqueous Solution
Author(s) -
Henke Artur,
Kadłubowski Sławomir,
Wolszczak Marian,
Ulański Piotr,
Boyko Volodymyr,
Schmidt Thomas,
Arndt KarlFriedrich,
Rosiak Janusz M.
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100409
Subject(s) - acrylic acid , aqueous solution , polymer chemistry , n vinylpyrrolidone , chemistry , molar mass distribution , chemical engineering , copolymer , polymer , organic chemistry , engineering
Hydrogen‐bonded complexation between high‐molecular‐weight poly( N ‐vinylpyrrolidone) (PVP, $\overline{M}_{\rm w}$ = 650 kDa) and poly(acrylic acid) (PAA) with weight‐average molar weights between 0.9 and 50 kDa, is studied in dilute, salt‐free aqueous solution. The onset of complexation, aggregation, and the structure of the formed particles are strongly influenced by PAA molecular weight, solution composition, and the method of sample preparation. With increasing poly(acrylic acid) chain length, IPCs show higher stability against aggregation. IPCs based on high‐molecular‐weight PAA show core‐corona architecture ensuring good sterical stabilization, whereas for those containing the shortest polyacid a loose soft‐sphere structure without distinct borders of different chain densities is found.