摘要： 增粘树脂因结构差异种类居多，在胶粘剂、涂料和油墨等产品中应用广泛，通过红外分析进行有效快速鉴别对于科研及生产单位是非常必要的。本研究选用不同增粘树脂作为研究对象，分类别比较其FT-IR谱图。研究表明:松香树脂含有酯基(γ _C=O)特征吸收峰，季戊四醇酯的烃链骨架振动为双峰(1 058 cm^-1，1 036 cm^-1)，甘油酯为单峰;萜烯树脂只出现较强的烷烃基团吸收，(δ=CH)吸收很弱;C₅石油树脂在970 cm^-1有δ=CH反式振动吸收，双环戊二烯树脂同时在970 cm^-1(反式)与702 cm^-1(顺式)振动吸收，且有环(γ _C-H)单峰(3 040 cm^-1)出现，氢化后，δ=CH吸收峰减弱或消失;C₉石油树脂等芳香族树脂有明显的芳环吸收，骨架振动吸收峰随颜色加深有所偏移，δ=CH吸收强度增强。

关键词: 增粘树脂, 红外光谱, 特征吸收峰, 骨架振动, 指纹区

Abstract:

There are many tackifier resins with different structures and are widely used in adhesives coatings, inks and others products, and it is very meaningful to conduct a study on the fast identification through FT-IR for research institutes and production units. Different tackifier resins were selected for FT- IR analysis. The results showed that rosin resin has a characteristic absorption peak of ester group, a shoulder peak(1 058 cm^-1, 1 036 cm^-1) of hydrocarbon chain skeleton vibration appeared in rosin pentaerythritol ester and only a single peak appeared in rosin glycerol ester; only a strong absorption peak of alkyl group were appeared in terpene resin and unsaturated(δ=CH)group absorption was very weak sometimes; C₅ petroleum resins was very similar to terpene resins in FT-IR, but C₅ petroleum resins had a clear δ= CH trans-vibration absorption at 970 cm^-1 ; dicyclopenta resins had δ= CH trans-vibratic absorption at 970 cm^-1 and cis-vibration absorption at 702 cm^-1, δ=CH absorption peak decreased or disappeared when two types of petroleum resins were hydrogenated. With deepening of color of C₉ petroleum resins, the skleton vibration absorption peak of aromatic ring was moved and the absorption intensity of δ=CH absorption peak strengthened.

Key words: tackifier resins, FT-IR, characteristic absorption peaks, skeleton vibration, fingerprint region