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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and Characterization of Side-Chain Polyimides for Second-Order Nonlinear Optics via a Post-azo-Coupling Reaction
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Synthesis and Characterization of Side-Chain Polyimides for Second-Order Nonlinear Optics via a Post-azo-Coupling Reaction

机译：通过偶氮偶合反应合成和表征用于二阶非线性光学的侧链聚酰亚胺

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摘要

A two-step, generally applicable synthetic approach for nonlinear opticla (NLO) side-chain polyimides was developed. This included the preparation of a preimidized, organosoluble polyimide with benzene moiety pendant from main chains, followed by the covalent bonding of the NLO chromophores onto the polyimide backbone via a post-azo-coupling reaction. The degree of functionalization of polyimides was estimated by UV-VIS spectroscopy. The glass transition temperature (T_g) of a polyimide decreased by only 10-20deg C after the functionalization, which was much smaller than the decrease in T_g when the chromophores were chemically bonded to the polyimide main chains through an ether linkage using a post-Mitsunobu condensation. The solubility and thermal stability of polyimides were also studied.
机译：针对非线性光学（NLO）侧链聚酰亚胺，开发了一种两步通用的合成方法。这包括制备具有主链上的苯部分侧基的预酰亚胺化的有机可溶性聚酰亚胺，然后通过偶氮后偶联反应将NLO生色团共价键合到聚酰亚胺主链上。聚酰亚胺的官能化程度通过UV-VIS光谱法估计。官能化后，聚酰亚胺的玻璃化转变温度（T_g）仅降低10-20℃，这比发色团通过Mitsunobu后通过醚键将生色团化学键合到聚酰亚胺主链上时的T_g降低要小得多。缩合。还研究了聚酰亚胺的溶解度和热稳定性。

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