Surface adsorption of polar end-functionalised polystyrenes

Soft Matter
Amilcar Pillay NarrainenRichard L Thompson

Abstract

Due to their inherently high surface energy, polar end-functionalised polymers do not normally adsorb to the external surfaces of blends. However, adsorption of polar functionalities can be induced rapidly by annealing in a polar environment such as glycerol prior to quenching to a glassy state. Blended films of carboxy end-functionalised deuteriopolystyrene (dPS-COOH) with hydrogenous polystyrene (hPS) were annealed at 150 °C under glycerol. Nuclear reaction analysis was used to quantify the surface excess of dPS-COOH retained at the surface after quenching the films to below the glass transition temperature. Incorporation of multiple COOH groups onto a single chain end greatly increases the affinity of these chains to the interface with glycerol. Here we have shown that even a difunctional material, dPS-2COOH, is much more surface active than either the singly functionalised dPS-COOH or the difunctional ester from which it was prepared. Self-consistent mean field theory yielded thermodynamic 'sticking energy' values per functionality at the polystyrene-glycerol surface of 1.3-1.7 for carboxy groups and 0.3 for ester groups.

References

Jan 16, 1989·Physical Review Letters·R A JonesS A Schwarz
Jun 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·F Thomas KiffRichard L Thompson

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Citations

May 14, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Richard L ThompsonRobert M Dalgliesh
Sep 11, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Lian R HutchingsRichard L Thompson
May 17, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Antoine BousquetJuan Rodríguez-Hernandez
May 17, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Daisuke KawaguchiTisato Kajiyama
Mar 21, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Imtiyaz A AnsariJohn R P Webster

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