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Influence of Glass-Transition Temperature and Chromophore Content on the Steady-State Performance of Poly(N-vinylcarbazole)-Based Photorefractive Polymers
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1999
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Optical MaterialsEngineeringResponsive PolymersChemistryPolymersChemical EngineeringPhotorefractive PolymersPolymer TechnologyPolymer MaterialChromophore ContentOptical PropertiesGlass-transition TemperaturePolymer ProcessingPolymer CompositesPhotopolymer NetworkPolymer ChemistryMaterials SciencePhotochemistryOrganic Pr MaterialsPolymer StabilityPolymer AnalysisRoom TemperaturePolymer SciencePolymer CharacterizationOrganic Photorefractive
In optimizing the performance of organic photorefractive (PR) materials, the glass transition temperature Tg is an important factor, according to the investigation reported here. The influence of Tg on the steady-state performance of four series of PR polymer composites at room temperature with chromophore content ρchr ranging from 20 to 50 wt.-% has been studied. The performance optimum found for highly doped materials with Tg approximately equal to room temperature is demonstrated to be a result of several counteracting effects. Organic PR materials are highly promising for holographic applications.