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Advances in Materials Science and Engineering
Volume 2016, Article ID 8020754, 11 pages
Research Article

Compositional Changes for Reduction of Polymerisation-Induced Shrinkage in Holographic Photopolymers

1Centre for Industrial and Engineering Optics, Dublin Institute of Technology, Dublin 8, Ireland
2School of Physics, Faculty of Science, Dublin Institute of Technology, Dublin 8, Ireland
3Department of Mathematics, Informatics and Physics, Agricultural University, Plovdiv, Bulgaria
4LCS, CRISMAT, University of Caen, 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France

Received 24 March 2016; Revised 30 July 2016; Accepted 17 August 2016

Academic Editor: Sergi Gallego

Copyright © 2016 D. Cody et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Polymerisation-induced shrinkage is one of the main reasons why many photopolymer materials are not used for certain applications including holographic optical elements and holographic data storage. Here, two compositional changes for the reduction of shrinkage in an acrylamide-based photopolymer are reported. A holographic interferometric technique was used to study changes in the dynamics of the shrinkage processes occurring in the modified photopolymer during holographic recording in real time. Firstly, the effect of the replacement of the acrylamide monomer in the photopolymer composition with a larger monomer molecule, diacetone acrylamide, on polymerisation-induced shrinkage has been studied. A reduction in relative shrinkage of 10–15% is obtained using this compositional change. The second method tested for shrinkage reduction involved the incorporation of BEA-type zeolite nanoparticles in the acrylamide-based photopolymer. A reduction in relative shrinkage of 13% was observed for acrylamide photopolymer layers doped with 2.5% wt. BEA zeolites in comparison to the undoped photopolymer.