Liquid Crystalline Polyurethane Elastomers Containing Mesogenic Azobenzene Pendant Groups for Photomechanical Actuators

Lin Juan Yu; Ren Gui Peng; Yuan Zhen Wang; Yue E Liu; Ying Kui Yang

doi:10.4028/www.scientific.net/AMR.531.580

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 531Liquid Crystalline Polyurethane Elastomers...

Liquid Crystalline Polyurethane Elastomers Containing Mesogenic Azobenzene Pendant Groups for Photomechanical Actuators

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.

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Periodical:

Advanced Materials Research (Volume 531)

Pages:

580-583

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.531.580

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Online since:

June 2012

Authors:

Lin Juan Yu, Ren Gui Peng, Yuan Zhen Wang, Yue E Liu, Ying Kui Yang

Keywords:

Azobenzene, Liquid Crystalline Elastomers, Photomechanical Actuators, Polyurethane (PU)

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