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Interaction of main‐chain polycations with sodium dodecyl sulfate
Author(s) -
Zheng Xiaoliang,
Cao Weixiao
Publication year - 2001
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.645
Subject(s) - sodium dodecyl sulfate , aqueous solution , chemistry , polymer chemistry , pyridine , copolymer , stoichiometry , molecule , molar ratio , sodium , polyelectrolyte , chain (unit) , styrene , hydrophobic effect , polymer , organic chemistry , catalysis , physics , astronomy
Abstract The interaction of the main‐chain polycations 2,2‐ionene (I 2,2 ) and 3,3‐ionene (I 3,3 ) with sodium dodecyl sulfate (SDS) has been investigated in aqueous solution. It was confirmed that the interaction is cooperative and a stoichiometric 1:1 complex of I 2,2 –SDS or I 3,3 –SDS with regular structure forms as a precipitate irrespective of the molar ratio of the components. It is completely different from the interaction of side‐chain polycations such as the poly[(vinyl pyridine)‐ co ‐styrene] copolymer cation (PVSC) with SDS, in which no cooperative effect was observed. The driving force responsible for the cooperative effect is believed to be the hydrophobic attraction between the SDS molecule already linked on the ionene chain and the next SDS molecule to be entered. It was also confirmed that the structures of the complexes are very different, ie the ionene–SDS complexes exhibit high regularity whereas the PVSC–SDS complex is irregular. © 2001 Society of Chemical Industry