Testing nucleation models for emulsion-polymerization systems

Morrison, Bradley R., Maxwell, Ian A., Gilbert, Robert G. and Napper, Donald H. (1992). Testing nucleation models for emulsion-polymerization systems. In: 201st National Meeting of the American Chemical Society. 201st National Meeting of the American Chemical Society, Atlanta, GA, United States, (28-44). 14-19 April 1991. doi:10.1021/bk-1992-0492.ch003


Author Morrison, Bradley R.
Maxwell, Ian A.
Gilbert, Robert G.
Napper, Donald H.
Title of paper Testing nucleation models for emulsion-polymerization systems
Conference name 201st National Meeting of the American Chemical Society
Conference location Atlanta, GA, United States
Conference dates 14-19 April 1991
Proceedings title 201st National Meeting of the American Chemical Society
Journal name Polymer Latexes: Preparation, Characterization, and Applications
Place of Publication Washington , DC, United States
Publisher American Chemical Society
Publication Year 1992
Sub-type Fully published paper
DOI 10.1021/bk-1992-0492.ch003
ISBN 9780841213487
0841213488
9780841223059
084122305X
Volume 492
Start page 28
End page 44
Total pages 16
Language eng
Abstract/Summary Particle formation in emulsion polymerization below the cmc is now accepted to take place by homogeneous-coagulative nucleation, but there is debate whether this or micellar entry is operative above the cmc. Literature data are shown to be unable to refute either model above the cmc. The mechanism for free-radical entry into latex particles (Maxwell, I.A.; Morrison, B.R.; Napper, D.H.; Gilbert, R.G., Macromolecules, 1991, 24, 1629) suggests that observed particle numbers above the cmc are only obtained if homogeneously nucleated free radicals spend time growing in micelles; this and other considerations suggest that above the cmc nucleation is by a combination of micellar and homogeneous mechanisms. New experimental results on the time evolution of a bimodal particle size distribution support the assumptions used to draw this conclusion. This suggests that both mechanisms are simultaneously operative above the cmc. The methodology can also predict conditions for onset of secondary nucleation below the cmc.
Q-Index Code B1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: Centre for Nutrition and Food Sciences Publications
 
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Created: Tue, 08 Mar 2011, 01:53:31 EST