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Hypercrosslinked Polystyrene Microspheres by Suspension and Dispersion Polymerization by Petr Šálek; Daniel Horák is a Materials Science article available to read on EtoBox.
What is Hypercrosslinked Polystyrene Microspheres by Suspension and Dispersion Polymerization about?
## Abstract To determine the influence of particle size on the specific surface area of hypercrosslinked poly(styrene-co-divinylbenzene) (PS) microspheres, two methods were chosen for preparation of particles, suspension and dispersion polymerization. While the former method produced hundred micrometer-sized PS-S microspheres, the latter yielded PS-D particles of ca. 1-μm size. Dispersion copolymerization of styrene (St) and divinylbenzene (DVB) in ethanol was stabilized by (hydroxypropyl)cellulose (HPC) and initiated with dibenzoyl peroxide (BPO). Monodisperse 1.4-μm PS-D microspheres were prepared only in the presence of 3.6 wt% HPC. All microspheres were chloromethylated with chloromethyl methyl ether (CMME), chloromethyl ethyl ether (CMEE) or chloromethyl octyl ether (CMOE) to investigate the effect of the chloromethylation agent on the specific surface area of microspheres. Chloromethylated microspheres were hypercrosslinked in 1,2-dichloroethane (DCE) in the presence of a Lewis acid (SnCl4). The effects of the crosslinker (DVB) and DCE/microsphere ratio on properties of the product were studied. The specific surface area, pore volume and pore size distribution of the microsph
Who reads Hypercrosslinked Polystyrene Microspheres by Suspension and Dispersion Polymerization?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Petr Šálek; Daniel Horák
- Publisher
- Walter de Gruyter GmbH
- Published
- 2011
- Language
- EN
- Field
- Materials Science (Physical Sciences)