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Cis-trans isomerization and optical laser writing in new heterocycle based azo-polyurethanes

机译：新型基于杂环的偶氮聚氨酯中的顺反异构化和光学激光写入

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摘要

Three new azo-polyurethanes containing the s-triazolo[3,4-b]thiadiazole heterocycle have been prepared and characterized. The polymers showed glass transition temperatures between 183 ℃ and 232 ℃ and a moderate to good thermal stability in air. The thermal cis-trans isomerization around the azo group was analyzed in solution and the kinetic constant of this process was calculated. One of the synthesized polymers was processed in form of thin films (thickness was 1.2 μm) and some experiments of optical laser writing were performed on it: three different surface relief gratings (SRGs) structures were realized at micrometer scale (a square, a concentric square pattern and a grating) indicating this polymer as an interesting candidate for the azo-lithography.
机译：制备并表征了三种新的含s-三唑并[3,4-b]噻二唑杂环的偶氮聚氨酯。该聚合物的玻璃化转变温度为183℃至232℃，在空气中具有中等至良好的热稳定性。在溶液中分析了偶氮基团周围的热顺-反异构体，并计算了该过程的动力学常数。一种合成的聚合物以薄膜形式（厚度为1.2μm）进行处理，并对其进行了光学激光写入实验：在微米级（正方形，同心）上实现了三种不同的表面浮雕光栅（SRG）结构正方形图案和光栅）表示该聚合物是偶氮平版印刷的有趣候选物。

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