Directional Mechanochromic Luminescent Behavior in Liquid Crystalline Composite Polymeric Films. Issue 1 (26th September 2016)

• Record Type: Journal Article
• Authors: Kondo, Mizuho; Nakanishi, Takao; Matsushita, Takumi; Kawatsuki, Nobuhiro
• Is Part Of: Macromolecular chemistry and physics. Volume 218:Issue 1(2017:Jan.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-09-26
• Subjects: alignment -- liquid crystalline polymers (LCP) -- mechanochromic luminescence; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201600321
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract : The doping of a liquid crystalline (LC) photoemissive compound into a LC polymethacrylate with photoemissive side groups induces repeatable changes in the photoemission wavelength upon mechanical grinding and thermal annealing. The color changes observed in a handwritten pattern demonstrate the successful induction of anisotropic photoemission behavior in a LC composite polymeric film parallel to the grinding direction. The LC characteristics of the composite films play an important role in the directional selectivity of the polarized mechanoinduced color change. Abstract : Anisotropic, mechanoresponsive color change patterning exploiting liquid crystalline characteristics is demonstrated. Polymer composite films comprising a low molecular weight mechanochromic compound and photoemissive liquid crystalline polymethacrylate are prepared. These composite films exhibit photoemission wavelength variations upon mechanical grinding, with the ground areas showing anisotropic photoemission along the scoring direction.