Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1497392 | Optical Materials | 2007 | 6 Pages |
Abstract
High resolution holographic polymer dispersed liquid crystal gratings are photo-induced periodic structures commonly affected by shrinkage. This phenomenon represents a problem in several application fields such as in high density optical storage. In this work we observed that, by directly monitoring the blue-shift of the reflection peak of the periodic structure, an evident shrinkage reduction occurs using the nitroxide radical Tinuvin770-N-yloxy [(bis(2,2,6,6-tetramethyl-piperidine-1-yloxy-4-yl)-sebacate] as inhibitor of polymerization. This compound is a stable hindered amine light stabilizer-derived free radical, which plays a significant role in the photo-polymerization dynamics.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Riccardo Castagna, Francesco Vita, Daniele E. Lucchetta, Luigino Criante, Lucedio Greci, Paolo Ferraris, Francesco Simoni,