Preparation and characterization of core-shell nanoparticles containing poly(chlorotrifluoroethylene-co-ethylvinylether) as core

Core shell latex particles with a glassy core and a low Tg polymeric shell are usually preferred. More so, the glassy core happens to be a fluoropolymer with a shell polymer that helps in processability. We describe here the preparation and characterization of core shell nanoparticles consisting of...

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Bibliographic Details
Published in:Journal of applied polymer science 2011-11, Vol.122 (3), p.1807-1814
Main Authors: Reddy, Ch. Koti, Raju, L. Yugandhar, Srinivas, P. V. S. S., Rao, P. Shanthan, Shekharam, T., Shailaja, D.
Format: Article
Language:English
Subjects:
Applied sciences
chlorotrifluoroethylene
Contact angle
core-shell nanoparticles
Exact sciences and technology
Glassy
Latex
Materials science
Nanoparticles
Organic polymers
Physicochemistry of polymers
Polymerization
Polymers
Polymers with particular properties
Polystyrene resins
Preparation, kinetics, thermodynamics, mechanism and catalysts
seeded emulsion polymerization
Shells
Surfactants
wettability
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Summary:Core shell latex particles with a glassy core and a low Tg polymeric shell are usually preferred. More so, the glassy core happens to be a fluoropolymer with a shell polymer that helps in processability. We describe here the preparation and characterization of core shell nanoparticles consisting of poly(chlorotrifluoroethylene‐co‐ethylvinylether) as core encapsulated in poly(styrene‐acrylate) copolymer shell using seeded emulsion polymerization method under kinetically controlled monomer starved conditions. Properties of the emulsion using surfactants (fluoro/conventional) and surfactant free conditions were investigated. Average size (100 nm), spherical shape and core–shell morphology of the latex particles was confirmed by dynamic light scattering and transmission electron microscopy. Absence of CF and CCl peaks in X‐ray photoelectron spectroscopy proves that cores are completely covered. Polymerization in the presence of fluorocarbon surfactant was found to give optimum features like narrow size distribution, good shell deposition and no traces of agglomeration. Films of core shell latex particles exhibited improved transparency and enhanced water contact angles thus making them suitable for applications in various fields including coatings. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.34262