Effect of partial quaternization on the aqueous solution properties of tertiary amine-based polymeric surfactants: Unexpected separation of surface activity and cloud point behavior

Vamvakaki, M, Unali, G F, Butun, V, Boucher, S, Robinson, K L, Billingham, N C and Armes, S P (2001) Effect of partial quaternization on the aqueous solution properties of tertiary amine-based polymeric surfactants: Unexpected separation of surface activity and cloud point behavior. Macromolecules, 34 (20). pp. 6839-6841.

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Abstract

Low degrees of Me iodide quaternization eliminates the LCST behavior of 2-(Dimethylamino)ethyl methacrylate-2-(diethylamino)ethyl methacrylate diblock copolymers (DMA-DEA) and significantly extends the pH (and temp.) range for colloidally stable micelles. Similar results were previously reported for fully quaternized DMA-DEA diblock copolymers, but these latter materials are poor surfactants since unfavorable electrostatic interactions lead to poor packing efficiencies at the air-water interface. In contrast, in the present study lightly quaternized diblock copolymers exhibit similar surface activities to the un-quaternized diblock copolymer precursor; thus, judicious control of the degree of quaternization unexpectedly allows fine-tuning and optimization of the aq. soln. properties of these new cationic polymeric surfactants. on SciFinder (R)

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Norman Billingham
Date Deposited: 06 Feb 2012 19:27
Last Modified: 30 Nov 2012 17:03
URI: http://sro.sussex.ac.uk/id/eprint/20683
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