Journal
POLYMERS
Volume 8, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/polym8040162
Keywords
NNPAM; NIPAM; NIPMAM; swelling behavior; microgel
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Funding
- Bundesministerium fur Bildung und Forschung (BMBF) within the Project 3D-LS SANS [05K13PB1]
- Deutsche Forschungsgemeinschaft
- Bielefeld University
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In this work, we compare the properties of smart homopolymer microgels based on N-n-propylacrylamide (NNPAM), N-isopropylacrylamide (NIPAM) and N-isopropylmethacrylamide (NIPMAM) synthesized under identical conditions. The particles are studied with respect to size, morphology, and swelling behavior using scanning electron and scanning force microscopy. In addition, light scattering techniques and fluorescent probes are employed to follow the swelling/de-swelling of the particles. Significant differences are found and discussed. Poly(N-n-propylacrylamide) (PNNPAM) microgels stand out due to their very sharp volume phase transition, whereas Poly(N-isopropylmethacrylamide) (PNIPMAM) particles are found to exhibit a more homogeneous network structure compared to the other two systems.
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