探索了丙烯腈-丁二烯-苯乙烯共聚物（以下简称：ABS树脂）结构。开展了ABS树脂结构的导数中红外（MIR）光谱（包括：包括一阶导数MIR光谱、二阶导数MIR光谱、三阶导数MIR光谱及四阶导数MIR光谱）和不同平滑点条件下（包括：5个平滑点、9个平滑点、13个平滑点、19个平滑点、25个平滑点、37个平滑点、49个平滑点和149个平滑点）二阶导数MIR光研究。实验发现，ABS树脂结构官能团的红外吸收模式包括：ν■、ν■、ν■、ν■、ν■、ν■、δ■、γ■、γ■和γ■。5个平滑点条件下，ABS树脂结构官能团二阶导数MIR光谱可以提供更加丰富的光谱信息。导数MIR光谱可以快速开展ABS树脂结构研究。

The structure of acrylonitrile butadiene styrene copolymer (hereinafter referred to as ABS resin) was explored. The derivative mid infrared (MIR) spectroscopy studies on ABS resin structures (including first-order derivative MIR spectroscopy, second-order derivative MIR spectroscopy, third-order derivative MIR spectroscopy, and fourth-order derivative MIR spectroscopy,) as well as second-order derivative MIR light studies under different smoothing conditions (including 5 smoothing points, 9 smoothing points, 13 smoothing points, 19 smoothing points, 25 smoothing points, 37 smoothing points, 49 smoothing points, and 149 smoothing points) were conducted. Experiments have found that the infrared absorption modes of functional groups in ABS resin structures include: ν■, ν■, ν■, ν■, ν■, ν■, δ■, γ■, γ■ and γ■. Under the condition of 5 smooth points, the second derivative MIR spectrum of functional groups in ABS resin structure can provide richer spectral information. Derivative MIR spectroscopy can quickly conduct structural studies on ABS resin.