| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10609291 | European Polymer Journal | 2005 | 8 Pages |
Abstract
A photopolymerization reaction involving 2-hydroxyethylmethacrylate (HEMA), a hydroxytelechelic polybutadiene (HTPB) and 2,2-dimethyl-2-hydroxyacetophenone (Darocur 1173) as photoinitiator has been investigated by Real Time UV and Real Time IR spectroscopies. For this system, RTUV analyses are completely opposite to the expected curves, namely a decrease in the sample absorbance (photobleaching phenomenon). This apparent contradiction has been explained by a scattering phenomenon inside the sample, which can be linked to the formation of sub-structures that can create local fluctuations of refractive index during the polymerization. A four-flux theory, which takes into account the polymer absorption and scattering properties, has allowed us to describe the UV light intensity variation inside the sample.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
N. Désilles, C. Gautrelet, L. Lecamp, P. Lebaudy, C. Bunel,