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Preparation of highly crosslinked monodisperse poly(styrene ‐co‐ divinylbenzene) microspheres by two‐stage dispersion polymerization
Author(s) -
Cao Moli,
Tong Bin,
Shen Jinbo,
Dong Yuping,
Zhi Junge
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.28199
Subject(s) - dispersity , divinylbenzene , dispersion polymerization , materials science , styrene , polymer chemistry , chemical engineering , particle size , dispersion (optics) , polymerization , azobisisobutyronitrile , radical polymerization , particle size distribution , copolymer , composite material , polymer , physics , optics , engineering
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. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008