Preparation of highly crosslinked monodisperse poly(styrene-co- divinylbenzene) microspheres by two-stage dispersion polymerization

Moli Cao, Bin Tong*, Jinbo Shen, Yuping Dong, Junge Zhi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Monodisperse poly(styrene-co-divinylbenzene) microspheres crosslinked with different concentrations of divinylbenzene were synthesized by two-stage dispersion polymerization in ethanol dispersion medium with poly(N-vinyl pyrrolidone) as a stabilizer and 2,2′-azobisisobutyronitrile as a radical initiator. The microsphere size, size distribution, surface morphology, and structure were characterized by a particle analyzer, a scanning microscope and IR spectroscopy. The effect of the adding time, the adding rate, and the concentration of crosslinker on the size, size distribution, and shape of the resulting particles were also investigated. Highly crosslinked monodisperse microspheres with diameters from 2 to 4 μm were obtained. The SEM characterization showed that the resulting microspheres had spherical shapes with smooth surfaces. The obtained microspheres have good resistance to solvent whether at ambient or heating temperatures and are thermally stable.

Original languageEnglish
Pages (from-to)1189-1196
Number of pages8
JournalJournal of Applied Polymer Science
Volume109
Issue number2
DOIs
Publication statusPublished - 15 Jul 2008

Keywords

  • Crosslinking
  • Dispersion polymerization
  • Micron-sized
  • Microspheres
  • Postaddition

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