摘要
采用变温傅里叶变换衰减全反射红外光谱技术(ATR-FTIR)结合二维相关红外光谱技术,分别研究了聚对苯二甲酸乙二醇酯(PET)的羰基红外伸缩振动模式(νC=O)。研究发现:玻璃转化温度(Tg)以下时,PET的νC=O的红外吸收频率包括1700cm^(-1)、1709cm^(-1)和1718cm^(-1),而随着测定温度的升高(313~343K),其红外吸收强度变化快慢顺序为:1709cm^(-1)>1700cm^(-1)>1718cm^(-1);而当在Tg以上时,PET的νC=O的红外吸收频率包括1709cm^(-1)和1718cm^(-1),而随着测定温度的升高(353~393K),PET的νC=O红外吸收强度变化快慢顺序为:1718cm^(-1)>1709cm^(-1)。本项研究拓展了ATR二维相关红外光谱技术在PET高分子材料热变性研究的范围。
The C= O stretch vibration (vc=o) of the polyethylene terephthalate (PET) had been studied by fourier transform attenuated total reflection infrared spectroscopy (ATR-FTIR) and ATR two-dimensional infrared spectroscopy. The vc-o occurred respectively near 1700 cm^-1 , 1709 cm^-1 and 1718 cm^-1 (below glass transition temperature) ,and the sequence of vc=o intensity changes was 1709 cm^-1〉 1700 cm^-1〉 1718 cm^-1 with the increase of temperature (313-343 K). But the vc-o were observed near 1709 cm^-1 and 1718 cm^-1 (above glass transition temperature) ,and the sequence of vc-o intensity changes was 1718 cm^-1 〉1709 cm^-1 with the increase of temperature (353-393 K). The paper demonstrated the key roles of ATR two-dimensional infrared spectroscopy in the analysis of thermal denaturation of the PET.
出处
《光散射学报》
北大核心
2016年第4期352-359,共8页
The Journal of Light Scattering
基金
河北省科技厅科学技术研究与发展计划(12222802)
石家庄市科学技术研究与发展计划课题(151500182A)
石家庄学院化工工艺科研团队资助项目(2015)
关键词
衰减全反射红外光谱
聚对苯二甲酸乙二醇酯
二维相关红外光谱
热变性
attenuated total reflection infrared spectroscopy
polyethylene terephthalate
ATR two-dimensional infrared spectroscopy
thermal denaturation