Abstract
A liquid crystalline polyurethane elastomer (LCPUE) film has been successfully fabricated by thermal polycondensation of azobenzene mesogenic monomer containing bishydroxyl groups with tolylene 2,4-diisocyanate, linear poly(ethylene glycol) and star pentaerythritol ethoxylate as a cross-linker. The thermotropic film of LCPUE was found to show reversible photoisomerism behavior and could be bent towards the direction of UV-light irradiation. The mechanical force generated in the LCPUE film upon photoirradiation was calculated to be 260–285 kPa according to the dynamic mechanical analysis. Thus this material may promise potential applications in remote light-controlled actuators.
Published Version
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