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Polymers 2011, 3(4), 1575-1590; doi:10.3390/polym3041575
Article

The Effect of Co-Monomer Content on the Swelling/Shrinking and Mechanical Behaviour of Individually Adsorbed PNIPAM Microgel Particles

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 and
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Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany
* Author to whom correspondence should be addressed.
Received: 15 August 2011 / Revised: 23 August 2011 / Accepted: 20 September 2011 / Published: 26 September 2011
(This article belongs to the Special Issue Polymer Nanogels and Microgels)
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Abstract

The swelling/deswelling behaviour of microgel particles in the bulk and at the surface was studied and correlated to their mechanical properties. We focused on two kinds of particles: pure PNIPAM and PNIPAM-co-AAc particles. It was shown that the two step volume phase transition found for PNIPAM-co-AAc particles in the bulk disappears after the adsorption at the surface and only a one step transition was identified. The transition temperature increased strongly with increasing the co-monomer content. The dependence of the Young’s modulus of the adsorbed microgel particles on the temperature and the co-monomer content was discussed. The investigations were performed via DLS and SFM.
Keywords: PNIPAM; microgels; AFM; elasticity; Young’s modulus PNIPAM; microgels; AFM; elasticity; Young’s modulus
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Burmistrova, A.; Richter, M.; Eisele, M.; Üzüm, C.; von Klitzing, R. The Effect of Co-Monomer Content on the Swelling/Shrinking and Mechanical Behaviour of Individually Adsorbed PNIPAM Microgel Particles. Polymers 2011, 3, 1575-1590.

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