کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5189455 1381185 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and second-order nonlinear optical properties of hyperbranched polymers containing pendant azobenzene chromophores
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis and second-order nonlinear optical properties of hyperbranched polymers containing pendant azobenzene chromophores
چکیده انگلیسی
Two hyperbranched polymers with methyl ester (P1) and epoxy (P2) terminal groups containing pendant azobenzene chromophores were prepared through an “A2 + B3” approach used for second-order nonlinear optical materials. Their chemical structures were characterized by NMR and GPC analyses. The polymers have good solubility in common organic solvents and film-forming ability. The pure films were fabricated successively without doping into other matrices. The poled films exhibit high second-harmonic generation coefficients (>50 pm/V) due to the three-dimensional spatial isolation effect resulting from their highly branched structures. The optical nonlinearity of the poled P2 film is thermally more stable than that of P1 due to the cross-linking of epoxy groups with carboxylic acid groups in the former during poling. The onset decay temperature of SHG intensity of P2 was determined to be at around 155 °C, which was 20 °C higher than that of P1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 48, Issue 20, 21 September 2007, Pages 5988-5993
نویسندگان
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