title: Porosity evolution of VP-DVB/MCM-41 nanocomposite.
abstract: The porous structure of nanostructured vinylpyrrolidone-divinylbenzene (VP-DVB)/MCM-41 composite was characterized using N(2) adsorption at 77K and positronium annihilation lifetime spectroscopy (PALS), atomic force microscopy (AFM) and Raman spectroscopy. Positron annihilation lifetime spectra were measured during outgassing procedure. The voids of differentiated dimensions were detected in the composite material. The number of free volumes and their dimensions depend on the degree of evacuation of volatile components from the samples.
authors.affiliation: M. Curie-Sklodowska University, Institute of Physics, Department of Nuclear Methods, M. Curie-Sklodowska sq. 1, 20-031 Lublin, Poland.
authors.forename: Radoslaw
authors.initials: R
authors.lastname: Zaleski
authors.forename: Wojciech
authors.initials: W
authors.lastname: Stefaniak
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Maciejewska
authors.forename: Jacek
authors.initials: J
authors.lastname: Goworek
mesh_terms: D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D011145:Polyvinyls / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: C509968:MCM-41; D011145:Polyvinyls; C530109:divinylbenzene-N-vinylpyrrolidone copolymer; D012822:Silicon Dioxide