Spécificités du traitement anticoagulant chez le sujet âgé

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• 作者：Virginie Siguret ; Isabelle Gouin
• 关键词：Epoxy ; Polyurethane ; Nonlinear optical (NLO) ; Post-functionalization
• 刊名：Revue Francaise des Laboratoires
• 出版年：2007
• 出版时间：February 2007
• 年：2007
• 卷：2007
• 期：Complete
• 页码：10-14
• 全文大小：9121 K

文摘

This paper reports a novel nonlinear optical polymer BP-AVT-TCV functionalized with a thiophene- and tricyanovinyl-substituted chromophore. BP-AVT-TCV was synthesized by the post-tricyanovinylation of an epoxy-based precursor polymer BP-AVT, and had a high molar functionalization degree of chromophore (70 mol. % ). It had an enhanced glass transition temperature (T_g = 164 °C) compared with BP-AVT (T_g = 114 °C), and a high decomposition temperature (T_{d,5 %} = 295 °C). BP-AVT-TCV was further cross-linked to achieve the three-dimensional (3D) network of thermosetting polyurethane (PU). The poled PU films revealed an electro-optic (EO) coefficient (γ₃₃) value of 21 pm/V at a wavelength of 1315 nm. The structures of the polymers were confirmed by FT-IR, UV–Vis, and ¹H NMR spectra.