Bartolozzi G, Marchiafava V, Mirabello V, Peruzzini M, Picollo M
"Nello Carrara" Institute of Applied Physics of the National Research Council of Italy (IFAC-CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jan 24;118:520-5. doi: 10.1016/j.saa.2013.09.017. Epub 2013 Sep 13.
A study aimed at determining the time necessary for an alkyd paint to attain chemical curing is presented. In particular, the object of our investigation was an oil paint made by Winsor & Newton, namely French ultramarine (PB29) in the Griffin Alkyd "fast drying oil colour" series. Using this paint, we prepared several mock-ups on glass. These were left in the laboratory at room temperature in a piece of furniture with glass doors for a total of 70 days. Samples were taken at different times, and the changes in their composition were monitored by means of FT-IR and multinuclear NMR spectroscopic analyses. Since the cross-linking reactions involved in the formation of the pictorial film mainly affect the amount of carbon-carbon double bonds, we monitored the decrease in allyl, diallyl and vinyl protons and carbons. The data obtained from the use of both techniques led us to conclude that, in our particular experimental conditions, the chemical curing of the paint layer is reached within the first 70 days, thus establishing the beginning of the ageing phenomena.
本文介绍了一项旨在确定醇酸漆达到化学固化所需时间的研究。具体而言，我们研究的对象是温莎&牛顿公司生产的一种油画颜料，即格里芬醇酸“快干油彩”系列中的群青（PB29）。我们使用这种颜料在玻璃上制作了几个模型。这些模型在实验室中，于室温下放置在一个带有玻璃门的家具中，总共放置70天。在不同时间采集样品，并通过傅里叶变换红外光谱（FT-IR）和多核核磁共振光谱分析监测其成分变化。由于形成漆膜所涉及的交联反应主要影响碳-碳双键的数量，我们监测了烯丙基、二烯丙基和乙烯基质子及碳的减少情况。使用这两种技术获得的数据使我们得出结论，在我们特定的实验条件下，漆层的化学固化在最初的70天内完成，从而确定了老化现象的开始。
