Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9559386 | Polymer | 2005 | 10 Pages |
Abstract
Protocols were examined for the measurement of rates and enthalpies of polymerization (ÎHp) using reaction calorimetry. ÎHp was determined to be 70.2Â kJÂ molâ1 for a series of seeded styrene emulsion polymerizations under typical emulsion conditions, in good agreement with literature values. However, there was a significant deviation from this value for small-particle systems, which is ascribed to surface effects, i.e. environmental effects on ÎHp. Careful comparison between rate data obtained by calorimetry and by dilatometry leads to recommended procedures for obtaining reliable and accurate rate data using the former technique.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
David J. Lamb, Christopher M. Fellows, Bradley R. Morrison, Robert G. Gilbert,