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首页> 外文期刊>Reactive & Functional Polymers >Polyurethane-epoxy based azopolymers: Influence of chemical structure over photoinduced birefringence
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Polyurethane-epoxy based azopolymers: Influence of chemical structure over photoinduced birefringence

机译:聚氨酯-环氧基偶氮聚合物:化学结构对光致双折射的影响

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摘要

A comparative study of the influence of the competitive reactions that can take place in epoxy-isocyanate based azo systems over optical behavior was developed. Diverse disperse red 19 (DR 19) azo urethane oligomers (PUs) were synthesized and characterized using size exclusion chromatography (SEC), Fourier transform infrared (FTIR), and UV-visible spectros-copy. Based on these urethane oligomers, epoxy-PU networks having isocyanurate and oxazolidone rings in their structures were prepared in different isocyanate/epoxy stoichiometric ratios, r=eq. NCO/eq. epoxy (0.5, 1, and 2). Photoinduced anisotropy (△n), remnant birefringence (RB) and dichroism were measured for the resulting polymers and evaluated as function of their T_gs and chemical structures. Final materials exhibited very high values of △n and RB being promised materials for using in optical storage information devices.
机译:进行了基于环氧-异氰酸酯的偶氮体系中竞争反应对光学行为影响的比较研究。合成了多种分散红19(DR 19)偶氮氨基甲酸酯低聚物(PU),并使用尺寸排阻色谱(SEC),傅里叶变换红外(FTIR)和紫外可见光谱进行了表征。基于这些氨基甲酸酯低聚物,以不同的异氰酸酯/环氧化学计量比(r = eq。)制备在结构上具有异氰脲酸酯和恶唑烷酮环的环氧-PU网络。 NCO /当量环氧(0.5、1和2)。测量所得聚合物的光致各向异性(△n),残余双折射(RB)和二色性,并根据其T_gs和化学结构对其进行评估。最终材料表现出非常高的△n和RB值,这是在光存储信息设备中使用的承诺材料。

著录项

  • 来源
    《Reactive & Functional Polymers》 |2012年第7期|p.478-485|共8页
  • 作者单位

    Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J.B. Justo 4102, 7600 Mar del Plata, Argentina;

    Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J.B. Justo 4102, 7600 Mar del Plata, Argentina;

    Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J.B. Justo 4102, 7600 Mar del Plata, Argentina;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    polyurethane; azopolymer; epoxy; optical birefringence;

    机译:聚氨酯偶氮聚合物环氧光学双折射;

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