Saviello Daniela, Pouyet Emeline, Toniolo Lucia, Cotte Marine, Nevin Austin
Politecnico di Milano, Dipartimento di Chimica Materiali e Ingegneria Chimica, Piazza Leonardo da Vinci, 26-20133 Milano, Italy.
European Synchrotron Radiation Facility, Polygone Scientifique Louis Néel, 6 rue Jules Horowitz, F-38000 Grenoble, France.
Anal Chim Acta. 2014 Sep 16;843:59-72. doi: 10.1016/j.aca.2014.07.021. Epub 2014 Jul 19.
Synchrotron-based Fourier transform infrared micro-spectroscopy (SR-μFTIR) was used to map photo-oxidative degradation of acrylonitrile-butadiene-styrene (ABS) and to investigate the presence and the migration of additives in historical samples from important Italian design objects. High resolution (3×3 μm(2)) molecular maps were obtained by FTIR microspectroscopy in transmission mode, using a new method for the preparation of polymer thin sections. The depth of photo-oxidation in samples was evaluated and accompanied by the formation of ketones, aldehydes, esters, and unsaturated carbonyl compounds. This study demonstrates selective surface oxidation and a probable passivation of material against further degradation. In polymer fragments from design objects made of ABS from the 1960s, UV-stabilizers were detected and mapped, and microscopic inclusions of proteinaceous material were identified and mapped for the first time.
基于同步加速器的傅里叶变换红外显微光谱技术（SR-μFTIR）被用于绘制丙烯腈-丁二烯-苯乙烯共聚物（ABS）的光氧化降解图谱，并研究来自意大利重要设计物品的历史样品中添加剂的存在情况及迁移情况。通过傅里叶变换红外显微光谱技术在透射模式下，使用一种制备聚合物薄片的新方法，获得了高分辨率（3×3μm²）的分子图谱。评估了样品中的光氧化深度，并伴随着酮、醛、酯和不饱和羰基化合物的形成。这项研究表明了材料的选择性表面氧化以及可能对进一步降解的钝化作用。在20世纪60年代由ABS制成的设计物品的聚合物碎片中，首次检测并绘制了紫外线稳定剂的图谱，同时识别并绘制了蛋白质类物质的微观内含物。
