title: Facile Fabrication of Water Dispersible Latex Particles with Homogeneous or Chain-Segregated Surface from RAFT Polymerization Using a Mixture of Two Macromolecular Chain Transfer Agents.
abstract: Water dispersible latex particles with randomly mixed shells or chain segregated surface are synthesized from one-pot reversible addition-fragmentation chain transfer heterogeneous polymerization of benzyl methacrylate (BzMA) using a mixture of poly(glycerol monomethacrylate) (PGMA) and poly(2,3-bis(succinyloxy)propyl methacrylate) (PBSPMA) macromolecular chain transfer agents. In methanol, the two in situ synthesized PGMA-b-PBzMA and PBSPMA-b-PBzMA diblock copolymers coaggregate into spherical micelles, which contain PBzMA core and discrete PGMA and PBSPMA nanodomains on the shell. In contrast, in water-methanol mixture (V/V = 9/1), latex particles with homogeneous distribution of PGMA and PBSPMA polymer chains on the shell are obtained. The reasons leading to formation of latex particles with homogenous or chain-segregated surface are discussed, and polymerization kinetics and physical state of PBSPMA in methanol and water-methanol mixtures are ascribed. These polymeric micelles with patterned functional group on the surface are potentially important for application in supracolloidal hierarchical assemblies and catalysis.
authors.affiliation: Department of Polymer Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
authors.forename: Li
authors.initials: L
authors.lastname: Sun
authors.affiliation: Department of Polymer Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
authors.forename: Liangzhi
authors.initials: L
authors.lastname: Hong
authors.affiliation: Research Institute of Materials Science, South China University of Technology, Guangzhou, 510640, China.
authors.forename: Chaoyang
authors.initials: C
authors.lastname: Wang
mesh_terms: D007840:Latex / Q000138:chemical synthesis* / Q000737:chemistry; D046911:Macromolecular Substances / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry*; D008823:Micelles; D015394:Molecular Structure; D058105:Polymerization; D014867:Water / Q000737:chemistry
chemical_list: D007840:Latex; D046911:Macromolecular Substances; D008689:Methacrylates; D008768:Methylmethacrylates; D008823:Micelles; C000613028:poly(2,3-bis(succinyloxy)propyl methacrylate); C000613027:poly(glycerol monomethacrylate); D014867:Water; C512584:benzyl methacrylate
keywords: block copolymers; core-shell polymers; phase separation; reversible addition fragmentation chain transfer