Emulsifier‐free miniemulsion polymerization of styrene and the investigation of encapsulation of nanoparticles with polystyrene via this procedure using an anionic initiator | Zendy

FaridiMajidi Reza | Zendy; SharifiSanjani Naser | Zendy

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Emulsifier‐free miniemulsion polymerization of styrene and the investigation of encapsulation of nanoparticles with polystyrene via this procedure using an anionic initiator

Author(s) -

FaridiMajidi Reza,

SharifiSanjani Naser

Publication year - 2007

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.26114

Subject(s) - miniemulsion , polystyrene , potassium persulfate , materials science , emulsion polymerization , polymerization , thermogravimetric analysis , radical polymerization , polymer chemistry , chemical engineering , nanoparticle , styrene , titanium dioxide , polymer , copolymer , nanotechnology , composite material , engineering

Emulsifier‐free miniemulsion polymerization of styrene was investigated in the presence of potassium persulfate (KPS) as an anionic initiator and cetyl alcohol as a costabilizer using ultrasonic irradiation and comparison of this procedure with conventional emulsifier‐free emulsion polymerization showed that this method has a remarkably higher polymerization rate ( R p ), smaller size of particles, and narrower molecular weight distribution via gravimetric measurement, transmission electron microscopy (TEM), and gel permeation chromatography techniques, respectively. Then, the encapsulation of magnetite (Fe 3 O 4 ) and titanium dioxide (TiO 2 ) nanoparticles with polystyrene was investigated using this procedure. Attempt to encapsulate magnetite nanoparticles failed; however, the encapsulation of titanium dioxide nanoparticles was successfully carried out via this procedure using KPS in both cases. TEM proved the presence of TiO 2 nanoparticles in polymer particles, and thermogravimetric analysis was used to determine the percentage of TiO 2 in the products. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007

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