ISSN:
0887-624X
Keywords:
anionic dispersion polymerization
;
particle formation
;
polystyrene-block-polybutadiene stabilizer
;
monomer multi-addition
;
micron-size particles
;
adsorption kinetics
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The mechanism for the formation of uniform micron-size polystyrene particles by anionic dispersion polymerization of styrene in hexane medium was investigated. Uniform particles in the range of 2.28-7.14 μm were obtained by varying the polymerization parameters such as the stabilizer, initiator, monomer multi-addition, and temperature. Particles of larger size and narrow molecular weight distribution were formed by increasing the initiator concentration. The particle size also increased with decreasing stabilizer concentration and polymerization temperature. The formation of larger size particles at lower temperature, lower stabilizer, and higher initiator concentrations provides supporting evidence that particle nucleation in anionic dispersion polymerization is due to a polymer chain aggregation mechanism. © 1996 John Wiley & Sons, Inc.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
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