Dynamic Mechanical And Thermal Behavior Of Novel Liquid-Crystalline Polybutadiene-Diols with Azobenzene Groups in Side Chains

Virginia TechPoláková, LenkaSedlakova, ZdenkaBenes, HynekValentova, HelenaKrakovsky, IvanRabie, Feras2014-03-262014-03-262013-09-01J. Rheol. 57, 1297 (2013); http://dx.doi.org/10.1122/1.48159800148-6055http://hdl.handle.net/10919/46790Liquid-crystalline (LC) polymers containing methoxy-or butoxy-substituted azobenzene in side chains have been prepared via radical addition of the in advance synthesized nematic thiols onto double bonds of poly(butadiene) diol [Polakova et al., Pol. Bull. 54, 315-326 (2010)]. In the present work, thermal behavior of these comblike polymers has been characterized by differential scanning calorimetry and polarizing optical microscopy. LC transitions have been also determined by rheological measurement. Time-temperature superposition of mechanical functions has been successfully applied to samples undergoing direct nematic/glassy state transition. (C) 2013 The Society of Rheology.application/pdfen-USIn CopyrightElastomersRheologyPolymersOrderDynamic Mechanical And Thermal Behavior Of Novel Liquid-Crystalline Polybutadiene-Diols with Azobenzene Groups in Side ChainsArticle - Refereedhttp://scitation.aip.org/content/sor/journal/jor2/57/5/10.1122/1.4815980Journal of Rheologyhttps://doi.org/10.1122/1.4815980