Monomer diffusion rates in photopolymer material. Part I. Low spatial frequency holographic gratings
Close, C.E. and Gleeson, M. R. and Sheridan, J. T. (2011) Monomer diffusion rates in photopolymer material. Part I. Low spatial frequency holographic gratings. Journal of the Optical Society of America B, 28 (4). pp. 658-666. ISSN 0740-3224
For photopolymers, knowing the rate of diffusion of the active monomer is important when modeling the material evolution during recording in order to understand and optimize their performance. Unfortunately, a confusingly wide range of values have been reported in the literature. Re-examining these results, experiments are carried out for both coverplated (sealed) and uncoverplated material layers and the measurements are analyzed using appropriate models. In this way, a more detailed analysis of the diffraction processes taking place for large-period gratings is provided. These results, combined with those in Part II, provide unambiguous evidence that the monomer diffusion rate in a commonly used acrylamide polyvinyl alcohol-based material is of the order of 10−10 cm2=s. This value closely agrees with the predictions of the nonlocal polymerization-driven diffusion model.
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