琥珀、柯巴树脂及其改善品的谱学特征  

Spectroscopic Characteristics of Amber,Copal Resin and the Improved Derivatives

作　　者：蔡灵婷 王以群[1] 刘学良[1] 黄月霞[1] CAI Lingting;WANG Yiqun;LIU Xueliang;HUANG Yuexia(School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2020年第2期227-233,共7页Journal of East China University of Science and Technology

摘　　要：选取天然琥珀、压制琥珀、天然柯巴树脂以及实验室热处理柯巴树脂为研究对象,采用常规的宝石学测试、红外光谱以及拉曼光谱3种无损检测手段对样品基本特征进行初步分析,进而剖析其特征谱峰归属;同时利用不同产地琥珀谱学特征的共性及差异,更为准确地寻找琥珀、柯巴树脂及其改善品的鉴别特征。结果表明,结合宝石学特性及光谱特征可以有效无损地鉴别琥珀、柯巴树脂及其改善品。In recent years, amber identification has still been a hot topic in academic research field. Amber, copal resin, pressed amber and heated copal resin are investigated using three non-destructive testing methods, including the conventional gemological testing method, Fourier transform infrared spectrum and Raman spectrum as a supplementary. From FT-IR testing results, amber, copal resin, pressed amber and heated copal resin have the similar basic FT-IR characteristics, such as absorption bands at 2 980-2 900 cm-1 and 2 900-2 800 cm-1 caused by the saturated C-H bond stretching vibration and the corresponding infrared absorption bands at 1 480-1 430 cm-1 and 1 400-1 350 cm-1 caused by CH2-CH3 bending vibration. Compared with amber, FT-IR characteristics of copal resin show infrared absorption at 889 cm-1, and FT-IR characteristics of pressed amber show strong absorption at 1 723 cm-1. When copal resin is heated, the absorption at 1 645 cm-1 is disappeared. Amber, copal resin, pressed amber and heated copal resin only have slight differences in the Raman shift. Compared with amber, copal resin lacks in the Raman shift at 1 720 cm-1. Through the exploration of its basic characteristics and analysis of the attribution of its functional group characteristic peaks, the differences and connections can be found among amber, copal resin, pressed amber and heated copal resin. The results show that the Gem identification should be combined with its physical and chemical properties and spectral characteristics.

关 键 词：琥珀 柯巴树脂 改善 红外光谱 拉曼光谱 

分 类 号：TQ314.1[化学工程—高聚物工业]