title: Fabrication and morphology of spongelike polymer material based on cross-linked sulfonated polystyrene particles.
abstract: A novel spongelike polymer material has been fabricated by γ-ray induced polymerization of methylmethacrylate (MMA) in an emulsion containing cross-linked sulfonated polystyrene (CSP) particles. Scanning electron microscopy (SEM) images reveal that the spongelike structure is made up of interlinked nanosized PMMA particles with micrometer-sized CSP-PMMA particles embedded inside. The nitrogen adsorption isotherm discloses that the spongelike material has a high specific surface area of 29 m(2)/g and a narrow pore size distribution of 60-120 nm. The formation mechanism is discussed in this paper, which indicates that the key steps to form the spongelike material include a Pickering emulsion stabilized by the CSP particles, followed by the swelling process of MMA into these particles. This approach offers a more convenient alternative to prepare polymeric spongelike material without any etching procedure.
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, P R China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Ji
authors.forename: Mozhen
authors.initials: M
authors.lastname: Wang
authors.forename: Dezhi
authors.initials: D
authors.lastname: Xu
authors.forename: Xuewu
authors.initials: X
authors.lastname: Ge
authors.forename: Huarong
authors.initials: H
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Tang
mesh_terms: D005720:Gamma Rays; D020366:Methylmethacrylate / Q000737:chemistry; D055616:Microtechnology / Q000379:methods*; D008958:Models, Molecular; D008968:Molecular Conformation; D058105:Polymerization; D011137:Polystyrenes / Q000737:chemistry*; D016062:Porosity; D013451:Sulfonic Acids / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry
chemical_list: D011137:Polystyrenes; D013451:Sulfonic Acids; D014867:Water; D020366:Methylmethacrylate