کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5184882 1381060 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photoinduced reorientation and polarization holography in photo-cross-linkable liquid crystalline polymer films with large birefringence
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Photoinduced reorientation and polarization holography in photo-cross-linkable liquid crystalline polymer films with large birefringence
چکیده انگلیسی

A new photo-cross-linkable liquid crystalline polymer (PLCP) comprised 4-methoxycinnamoyloxy groups connected with a bistolane side group was synthesized to investigate thermally enhanced photoinduced molecular reorientation of a thin film with linearly polarized (LP) 365 nm light exposure. Due to the axis-selective photoreaction of the cinnamate groups followed by the thermally induced self-organization, large molecular reorientation parallel to the polarization of LPUV light (S > 0.6) and large birefringence at the non-resonance region (Δn = 0.34 at 632.8 nm) were obtained. The obtained Δn value is the largest among transparent PLCPs in the visible region. The influence of the degree of photoreaction and the annealing temperature on the thermally enhanced molecular reorientation behavior was explored in detail. Finally, for an application of thin optical devices using the PLCP films, pure polarization holographic gratings with large birefringence, which showed periodic molecularly oriented structure, were fabricated using a 325 nm He-Cd laser in various polarization modes and characterized their optical properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 51, Issue 13, 7 June 2010, Pages 2849-2856
نویسندگان
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