Počet záznamů: 1

Hypercrosslinked polystyrene microspheres by suspension and dispersion polymerization

  1. 1.
    0360930 - UMCH-V 2012 RIV US eng J - Článek v odborném periodiku
    Šálek, Petr - Horák, Daniel
    Hypercrosslinked polystyrene microspheres by suspension and dispersion polymerization.
    E-Polymers. -, 064 (2011), s. 1-12 ISSN 1618-7229
    Grant CEP: GA ČR GA203/09/0857; GA ČR GAP503/10/0664; GA MŠk 2B06053
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: polystyrene * microspheres * hypercrosslinked
    Kód oboru RIV: EE - Mikrobiologie, virologie
    Impakt faktor: 0.515, rok: 2011
    http://www.e-polymers.org/journal/papers/dhorak_230611.pdf http://www.e-polymers.org/journal/papers/dhorak_230611.pdf

    To determine the influence of particle size on the specific surface area of hypercrosslinked poly(styrene-co-divinylbenzene) (PS) microspheres. Suspension and dispersion polymerization were chosen for their preparation. Dispersion copolymerization of styrene and divinylbenzene (DVB) in ethanol was stabilized by (hydroxypropyl)cellulose (HPC) and initiated with dibenzoyl peroxide . Monodisperse 1.4-µm microspheres were prepared in the presence of 3.6 wt% HPC. Microspheres were chloromethylated with chloromethyl methyl ether , chloromethyl ethyl ether or chloromethyl octyl ether to investigate the effect of the chloromethylation agent on the specific surface area of microspheres. Chloromethylated microspheres were hypercrosslinked in 1,2-dichloroethane (DCE) with SnCl4. The effects of the (DVB) and DCE/microsphere ratio on properties of the product were studied. Characterization of porous structure were done by dynamic desorption of nitrogen, cyclohexane regain and mercury porosimetry.
    Trvalý link: http://hdl.handle.net/11104/0006503