Facile preparation of crosslinkable organic EO polymers based on AZO nonlinear optical chromophore: great indemnification for long term of stability

文献类型： 外文期刊

第一作者： Zhou, Jian

作者： Zhou, Jian;Wang, Min;Liu, Jialei;Fedorchuk, A. A.;Kityk, I. V.

作者机构：

期刊名称：JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS （ 影响因子：2.478； 五年影响因子：2.171 ）

ISSN： 0957-4522

年卷期： 2017 年 28 卷 6 期

页码：

收录情况： SCI

摘要： Due to the simple preparation technology and appropriate crosslinking process, polyurethane was selected as the host polymer for the preparation of organic electro-optics (EO) materials. The synthesis and crosslinking process of polyurethane demanded the nonlinear optical (NLO) chromophore possessing strong stability in acid environment. Fortunately, after the introduction of azo group in the electronic bridge, the stability of this kind of chromophores in acidic environment was improved greatly. Polyurethane EO polymers and EO films based on this kind of chromophore were prepared successfully. The crosslinking process was monitored by infrared spectroscopy clearly. The crosslinking process has direct relationship with the molecular weight of the crosslinkers. Crosslinker of triethanolamine with small molecular weight showed low crosslinking temperature (80 A degrees C) and short crosslinking time (20 min). The crosslinking temperature and time was improved to 140 A degrees C and 60 min based on Poly(bisphenol A glycidyl ether aniline) (BPAN) crosslinker with large molecular weight. More importantly, this kind of EO polymers showed us large second order nonlinear optical coefficients (76.1 pm/V) and good long term stability (130 A degrees C).

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