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Hypercrosslinked polystyrene microspheres by suspension and dispersion polymerization
- 1.0360930 - ÚMCH 2012 RIV US eng J - Journal Article
Šálek, Petr - Horák, Daniel
Hypercrosslinked polystyrene microspheres by suspension and dispersion polymerization.
E-Polymers. -, 064 (2011), s. 1-12. ISSN 1618-7229. E-ISSN 1618-7229
R&D Projects: GA ČR GA203/09/0857; GA ČR GAP503/10/0664; GA MŠMT 2B06053
Institutional research plan: CEZ:AV0Z40500505
Keywords : polystyrene * microspheres * hypercrosslinked
Subject RIV: EE - Microbiology, Virology
Impact factor: 0.515, year: 2011
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.
Permanent Link: http://hdl.handle.net/11104/0006503
Number of the records: 1