仿宝石塑料材料的拉曼光谱分析

Raman Spectroscopic Analysis of Plastic Material Used for Gem Copies

应用便携式拉曼光谱仪对赛璐珞、聚苯乙烯、聚氯乙烯、聚甲基丙烯酸甲酯这4种较为常见的仿宝石塑料材料进行了分析测试研究,获得它们的标准拉曼光谱。然后将它们与其对应的被仿宝石(象牙、琥珀、珍珠、水晶)的拉曼光谱分别进行了比对分析。研究结果表明,因其分子结构存在较大差异,其拉曼光谱的差异也比较显著,从拉曼光谱上就能准确地将它们辨别出来。从而找到了一种便捷、准确、快速、无损的鉴定宝石与其塑料仿品的方法。

The portable Raman spectroscopy technique was applied to determine and analyze four common plastic imitation material for gems copies, including celluloid, polystyrene, polyvinyl chloride and polymethylmethacrytate, then their standard Raman spectra were obtained. Compared with the Raman spectra of the corresponding original gems （ivory, amber,pearl and crystal）, and the results were analyzed. The studies showed that the large differences in molecular structure, and Raman spectra were relatively obvious. The original gems and their fake copies could be accurately distinguished from their Raman spectra. Accordingly, a direct, precise, rapid and nondestructive method for identification of gems and their plastic generic products is found.