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Holographic photopolymer materials : nonlocal polymerization-driven diffusion under nonideal kinetic conditions
Date Issued
2005-02-01
Date Available
2011-11-28T16:56:27Z
Abstract
The kinetics of photosensitive polymer holographic recording materials are examined assuming a material that exhibits nonideal kinetic behavior. Previously, a linear relationship between monomer concentration and polymerization was assumed when deriving the nonlocal polymer-driven diffusion (NPDD) model. This is consistent with ideal kinetic conditions in which chain termination is governed by a bimolecular process. However,
these models have been reported to disagree with experimental results. In a limiting case of nonideal kinetics it is assumed that primary termination is dominant. In this case the NPDD model must be modified
to incorporate a quadratic relationship between the monomer concentration and the polymerization rate. By use of a multiharmonic expansion method of solution the predictions of ideal (bimolecular or linear) and nonideal (primary or quadratic) kinetic models are compared. By using these models we carried out numerical
fits to experimental growth curves of gratings recorded in an acrylamide-based cross-linked photopolymer system. Superior fits are achieved by use of the primary termination model. Physical parameters such as the diffusion constant are extracted and compared with results previously reported in the literature.
Sponsorship
Science Foundation Ireland
Irish Research Council for Science, Engineering and Technology
Other funder
Other Sponsorship
Enterprise Ireland
Type of Material
Journal Article
Publisher
Optical Society of America
Journal
Journal of the Optical Society of America B
Volume
22
Issue
2
Start Page
407
End Page
416
Copyright (Published Version)
2005 Optical Society of America
Subject – LCSH
Holographic storage devices (Computer science)
Photopolymers
Diffraction gratings
Web versions
Language
English
Status of Item
Not peer reviewed
ISSN
0740-3224 (print)
1520-8540 (online)
This item is made available under a Creative Commons License
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Holographic photopolymer materials_Non-local polymerisation driven diffusion under non-ideal kinetic conditions.pdf
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197.74 KB
Format
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Scopus© citations
105
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