Journal
POLYMERS
Volume 3, Issue 4, Pages 1575-1590Publisher
MDPI
DOI: 10.3390/polym3041575
Keywords
PNIPAM; microgels; AFM; elasticity; Young's modulus
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Funding
- Deutsche Forschungsgemeinschaft [SPP1259, IGTRG 1524]
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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.
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