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Ionic Complexes of Polyacids and Cationic Surfactants
Author(s) -
Tolentino Ainhoa,
de Ilarduya Antxon Martínez,
Alla Abdelilah,
MuñozGuerra Sebastián
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201051037
Subject(s) - alkyl , cationic polymerization , side chain , small angle x ray scattering , ionic bonding , polymer chemistry , carbon chain , chemistry , materials science , crystallography , organic chemistry , polymer , scattering , ion , optics , physics
Comb‐like ionic complexes were prepared from polyuronic acids (pectinic and alginic acids) and alkyltrimethylammonium surfactants bearing linear alkyl chains with 18, 20 and 22 carbon atoms. In the condensed state, these complexes were able to self‐assemble in ordered structures which were thermally stable up to ∼200 °C. The complexes were analysed by DSC and WAXS/SAXS and compared to their analogous made from poly(γ‐glutamic acid). They all adopt a biphasic layered structure in which the main chain and the alkyl side chain alternate with a nanometric periodicity. Alkyl side chains were partially crystallized in these complexes and they show reversible melting at temperatures within the 60‐80 °C range depending on the length of the polymethylene segment.