Dual effects of fullerene doped to holographic polymer dispersed liquid crystals |
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| Authors: | Ju Yeon Woo Eun Hee Kim Byung Kyu Kim |
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| Affiliation: | 1. Department of Polymer Science and Engineering, Pusan National University, Busan 609‐735, Korea;2. Department of Polymer Science and Engineering, Pusan National University, Busan 609‐735, KoreaDepartment of Polymer Science and Engineering, Pusan National University, Busan 609‐735, Korea |
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| Abstract: | Doping of conductive fullerene particles to the formulation of conventional holographic polymer dispersed liquid crystal‐induced dual effects of reducing both droplet coalescence and operating voltage. Fullerene induced an induction period which otherwise does not exist, followed by a gradual increase of diffraction efficiency to a saturation value being increased with increasing fullerene content. The increased diffraction efficiency was caused by the decreased droplet coalescence which was due to the hindered migration of LC by the fullerene particles. On the other hand, doped fullerene particles augmented the conductivity of polymer phase and hence the local electrical field imposed on LC droplet, which overcome the threshold for driving and reduced operating voltage and response times. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 5590–5596, 2007 |
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| Keywords: | conductivity dispersions fullerene HPDLC morphology polyurethane |
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