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Light-Mediated Thiol–Ene Polymerization in Miniemulsion: A Fast Route to Semicrystalline Polysulfide Nanoparticles
journal contribution
posted on 2014-09-16, 00:00 authored by Florent Jasinski, Emeline Lobry, Bassam Tarablsi, Abraham Chemtob, Céline Croutxé-Barghorn, Didier Le Nouen, Adrien CriquiHistorically,
the synthesis of aqueous polymer dispersions has
focused on radical chain-growth polymerization of low-cost acrylate
or styrene emulsions. Herein, we demonstrate the potential of UV-initiated
thiol–ene
step-growth radical polymerization, departing from a nontransparent
difunctional monomer miniemulsion based on ethylene glycol dithiol
and diallyl adipate. Performed without solvent and at ambient conditions,
the photopolymerization process is energy-effective, environmentally
friendly, and ultrafast, leading to full monomer consumption in 2
s,
upon irradiating a miniemulsion contained in a 1 mm thick quartz
cell microreactor. The resultant linear poly(thioether ester) particles
have an average
diameter of 130 nm. After water evaporation, they yield a clear elastomeric
film combining chemical resistance and high degree of crystallinity
(55%).
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elastomeric filmPolymerizationcrystallinitydiallyl adipateThiolquartz cell microreactorchemical resistancestyrene emulsionsmonomer consumptiondiameter1 mmestersynthesiswater evaporationFast RouteMiniemulsionpolymer dispersionsambient conditionsnontransparent difunctional monomer miniemulsion130 nmethylene glycol dithiolSemicrystalline Polysulfide NanoparticlesHistoricallyHereinirradiatingultrafastacrylatephotopolymerization process
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