کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5210956 1382929 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoinduced cooperative reorientation in polymer blend films with hydrogen-bonded mesogenic side groups
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Photoinduced cooperative reorientation in polymer blend films with hydrogen-bonded mesogenic side groups
چکیده انگلیسی
Thermally enhanced photoinduced cooperative reorientation in hydrogen (H)-bonded polymer blend films was investigated. The films consisted of two kinds polymethacrylates with hexamethylene spacer groups terminated with 4-oxycinnamic acid (P6CA), 4-oxybenzoic acid (P6BA) or 4-(4′-oxyphenyl)benzoic acid (P6PBA) in the side chains. The films were subjected to linearly polarized ultraviolet (LPUV) light and subsequent annealing. Sufficient cooperative in-plane molecular reorientation in P6CA-P6BA blend films was achieved for the first time. In P6CA-P6PBA blend films, however, reorientation was not observed. The molecular weight, as well as the thermal properties of the homopolymers and the degree of photoreaction all played an important role in the cooperative reorientation behavior of the blend films. Finally, uniform alignment control of low-molecular-weight liquid crystals (LCs) on the molecularly reoriented polymer blend films perpendicular to the polarization E of LPUV light was obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 69, Issue 11, November 2009, Pages 836-842
نویسندگان
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