Faculty of Chemical Engineering and Technology, UTP University of Science and Technology, Seminaryjna 3, 85-326, Bydgoszcz, Poland.
Institute of Mathematics and Physics, UTP University of Science and Technology, Kaliskiego 7, 85-796, Bydgoszcz, Poland.
Sci Rep. 2021 Sep 13;11(1):18165. doi: 10.1038/s41598-021-96713-w.
The cadmium pigments were yellow, orange and red pigments. They consisted of cadmium sulphide and cadmium sulphide with zinc sulphide as well as cadmium sulphide with cadmium selenide. Their quantitative composition and specific surface area were examined. The pigments were used to color the poly (vinyl chloride) plastisol films, which were then exposed to UV radiation. The surfaces of the coloured membranes were examined by infrared spectroscopy before and after irradiation with UV. The changes occurred in the PVC membrane were investigated by thermogravimetric analysis. The degree of crystallinity of the pigments and the membrane was determined by X-ray diffraction. The color change of the membranes was determined from the spectra obtained by reflection spectroscopy, and the components of colour L*, a* and b* were calculated. Base of them, the tolerance of colour deviations (ΔE*) was determined. The calculations allowed for the determination of the effect of UV irradiation on the change of the colour of the membranes and confirmation of the degradation of the pigments and polymer membrane.
镉颜料为黄色、橙色和红色颜料。它们由硫化镉、硫化镉与硫化锌以及硫化镉与硒化镉组成。对它们的定量组成和比表面积进行了检测。这些颜料被用于给聚（氯乙烯）糊塑料薄膜上色，然后将这些薄膜暴露在紫外线下。用红外光谱法在辐照前后检测了着色膜的表面。通过热重分析研究了 PVC 膜的变化。通过 X 射线衍射确定了颜料和膜的结晶度。通过反射光谱获得的光谱确定了膜的颜色变化，并计算了颜色 L*、a和 b的分量。在此基础上，确定了颜色偏差的容限（ΔE*）。这些计算有助于确定紫外光照射对膜颜色变化的影响，并证实了颜料和聚合物膜的降解。
