Interaction of main-chain polycations with sodium dodecyl sulfate

✍ Scribed by Xiaoliang Zheng; Weixiao Cao

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 104 KB
• Volume: 50
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/pi.645

✦ Synopsis

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