乳胶变温傅里叶变换衰减全反射红外光谱研究

Temperature effect on attenuated total reflection infrared spectroscopy of latex

采用变温傅里叶变换衰减全反射红外光谱（ATR-FTIR）技术,研究了乳胶的分子结构。实验发现：乳胶主要存在着C-H伸缩振动模式（νC-H、C-N伸缩振动模式（νC-N、CH2变角振动模式（δCH2）、CH3不对称弯曲振动模式（δ（asCH3）、CH3对称弯曲振动模式（δsCH3）和双键上C-H面外摇摆振动模式（ωC-H）等。实验发现：在303-393K温度范围内,乳胶具有良好的热稳定性。本项研究拓展了ATR-FTIR在高分子材料热变性方面的研究范围。

The latex organic molecular were characterized by fourier transform attenuated total reflection in-frared spectroscopy（ATR-FTIR）. There were latex C-H stretch vibration（νC-H, C-N stretch vibration（νC-N,CH2 scissoring bond vibration（δCH2）, CH3 asymmetric bending vibration（δasCH3）, CH3 symmetrical bending vibration（δsCH3）, and C-H wagging vibration（ωC-H） In the temperature range 303-393K, the latex had good thermal stability. The study demonstrated the key roles of ATR-FTIR in the analysis of thermal denaturation of the polymer materials.