Poling and crosslinking processes in NLO polymers |
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| Authors: | William K Bell Brandon M Rawlings Brian K Long R Chad Webb B Keith Keitz Lukas Häußling C Grant Willson |
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| Institution: | 1. Department of Chemistry and Biochemistry, The University of Texas, , Austin, Texas, 78712;2. Department of Chemical Engineering, The University of Texas, , Austin, Texas, 78712;3. Department of Chemistry, The University of Tennessee, , Knoxville, Tennessee, 37996;4. The IBM Almaden Research Center, , San Jose, California, 95120 |
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| Abstract: | A series of photocrosslinkable polymers bearing hyperpolarizable side chain chromophores was synthesized, poled and evaluated on the basis of the thermal stability of Second Harmonic Generation (SHG). Photoinitiation allowed for control of the onset of curing. Crosslinking was monitored by infrared spectroscopy and optimal conversion was achieved by applying a slow temperature ramp during exposure. The ultimate stability of the poled polymers was directly related to the number of crosslinking substituents that were attached to the chromophore pendant group. With two reactive groups per chromophore significant SHG was retained at temperatures above the initial polymer glass transition temperature. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52, 2769–2775 |
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| Keywords: | crosslinking NLO photopolymerization poled polymer SHG |
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