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首页> 外文期刊>Journal of Polymer Science, Part A. Polymer Chemistry >Synthesis and chirooptical properties of optically active poly(ester imide)s based on axially asymmetric 1,1 '-binaphthyls
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Synthesis and chirooptical properties of optically active poly(ester imide)s based on axially asymmetric 1,1 '-binaphthyls

机译:基于轴向不对称的1,1'-联萘基的旋光性聚酰亚胺酯的合成及旋光性能

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摘要

A series of optically active poly(ester imide)s (PEsI's) has been synthesized by the polycondensation reactions of new axially asymmetric dianhydrides, that is, (R)-2,2'-bis(3,4-dicarboxybenzoyloxy)-1,1'-binaphthyl dianhydride and (S)-2,2'-bis(3,4-dicarboxybenzoyloxy)-1,1'-binaphthyl dianhydride, and various diamines with aromatic, semiaromatic, and aliphatic structures. The polymers have inherent viscosities of 0.45-0.70 dL/g, very good solubility in common organic solvents, glass-transition temperatures of 124-290 degreesC, and good thermal stability. Wide-angle X-ray crystallography of these polymers shows no crystal diffraction. In comparison with model compounds, an enhanced optical rotatory power has been observed for the repeat unit of optically active PEsI's based on aromatic diamines, and it has been attributed to a collaborative asymmetric perturbation of chiral 1,1'-binaphthyls along the rigid backbones. (C) 2004 Wiley Periodicals, Inc.
机译:通过新的轴向不对称二酐(R)-2,2'-双(3,4-二羧基苯甲酰氧基)-1的缩聚反应合成了一系列光学活性的聚(酯酰亚胺)(PEsI)。 1'-联萘二酐和(S)-2,2'-双(3,4-二羧基苯甲酰氧基)-1,1'-联萘二酐,以及各种具有芳族,半芳族和脂族结构的二胺。该聚合物的固有粘度为0.45-0.70 dL / g,在普通有机溶剂中的溶解度非常好,玻璃化转变温度为124-290℃,并且热稳定性良好。这些聚合物的广角X射线晶体学没有显示出晶体衍射。与模型化合物相比,已观察到基于芳族二胺的旋光性PEsI重复单元的旋光能力增强,这归因于手性1,1'-联萘沿刚性主链的协同不对称扰动。 (C)2004年Wiley Periodicals,Inc.

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