Abstract
Using a non-ionic steric stabilizer for the RAFT aqueous emulsion polymerization of methyl methacrylate leads to flocculated nanoparticles when targeting DPs > 100; there is no such constraint when employing an anionic stabilizer block.
Highlights
Reversible addition–fragmentation chain transfer (RAFT) polymerization is a well-established pseudo-living technique based on the principle of rapid reversible chain transfer thatTypically, spherical nanoparticles of tunable particle size can be readily prepared at high solids,[16] so-called ‘higher order’ copolymer morphologies are accessible for at least some formulations.[18,19,20]Potential applications for such nano-objects include surface modifiers for cellulose fibres,[21] viscosity modifiers,[22] organic opacifiers for paints[23] and additives for the reinforcement of latex films.245760 | Polym
A series of PGMA50-PMMAx nanoparticles were obtained by systematically varying the target degree of polymerization (DP) of the PMMA core-forming block (Scheme 1)
Similar Gel permeation chromatography (GPC) data were reported by Chaduc and co-workers for the RAFT aqueous emulsion polymerization of methyl methacrylate (MMA) using a poly(methacrylic acid) (PMAA) precursor at pH 3.5.29 Clearly, this aqueous polymerization-induced self-assembly (PISA) formulation does not suffer from colloidal instability problems when targeting relatively high PMMA DPs
Summary
Reversible addition–fragmentation chain transfer (RAFT) polymerization is a well-established pseudo-living technique based on the principle of rapid reversible chain transfer thatTypically, spherical nanoparticles of tunable particle size can be readily prepared at high solids,[16] so-called ‘higher order’ copolymer morphologies (e.g. worms or vesicles) are accessible for at least some formulations.[18,19,20]Potential applications for such nano-objects include surface modifiers for cellulose fibres,[21] viscosity modifiers,[22] organic opacifiers for paints[23] and additives for the reinforcement of latex films.245760 | Polym. UV GPC curves (λ = 309 nm) recorded during the removal of trithiocarbonate end-groups from an aqueous dispersion of HOOC-PGMA54-PMMA80 nanoparticles using visible light irradiation, excess H2O2 or neither condition at 80 °C.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
