Synthesis of crosslinked polymer nanoparticles suitable for the formation of nanolayer organic films |
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Authors: | Andrea Uveges John F Hartmann Lajos Daroczi Janos Borbely |
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Institution: | (1) Department of Colloid and Environmental Chemistry, University of Debrecen, 4010 Debrecen, Hungary;(2) Department of Solid State Physics, University of Debrecen, 4010 Debrecen, Hungary;(3) ElizaNor Polymer LLC, 1 Woodmeadow Lane, Princeton Junction, NJ 88550, USA;(4) BBS Nanotechnology Ltd, P.O. Box 12, 4225 Debrecen 16, Hungary |
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Abstract: | Free radical crosslinking copolymerization of styrene and ethylene glycol dimethacrylate (nST/nEGDM in feed = 5/5) has been investigated in toluene. Variation of the reaction conditions allows the formation of macromolecules
with low molecular weight (21.6 kDa and 12 nm in diameter), perfectly soluble branched particles in the early stage of the
polymerization. Elongation of the reaction time leads to the formation of soluble/swelling microgels with medium molecular
weight (156 kDa and 41–120 nm) and, finally, swelling/particularly soluble colloidal polymer particles with very high molecular
weight (3.6 MDa and 59–324 nm). Conversion, molecular weight by gel permeation chromatography (GPC)], ratio of pendant vinyl
groups by nuclear magnetic resonance (NMR)], size of nanoparticles in swollen by dynamic light scattering (DLS)] and dried
state by transmission electron microscopy (TEM)], morphology by scanning electron microscopy (SEM)], and nanolayer film
formation (by SEM) were measured. The role of reaction conditions in producing different polymer structures and morphologies
was demonstrated. |
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Keywords: | Free radical polymerization Nanoparticles Nanolayer film formation |
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