摘要
在303~393K温度范围内,采用变温傅里叶变换衰减全反射红外光谱（ATR-FTIR）技术分别测定硅氧树脂的一维红外光谱、二阶导数红外光谱和四阶导数红外光谱。研究发现,在1800~600cm-1范围内,聚硅氧树脂主要存在着CH3伸缩振动模式（νCH3）、CH3变形振动模式（δCH3）、CH3摇摆振动模式（ρCH3）、Si-O伸缩振动模式（νSi-O）和Si-C伸缩振动模式（νSi-C）。在1100~1000cm-1范围内,以νSi-O为研究对象,研究了温度对硅氧树脂分子结构的影响。实验发现,随着测定温度的升高,硅氧树脂νSi-O的主要红外吸收频率出现了明显的红移现象。进一步研究了硅氧树脂νSi-O的二维红外光谱,考查温度对于νSi-O红外吸收强度的影响。研究发现,随着测定温度的升高,硅氧树脂νSi-O红外吸收强度的变化快慢顺序为：1024cm-1〉1096cm-1〉1010cm-1〉1076cm-1〉1083cm-1〉1064cm-1。本研究拓展了ATR-FTIR技术在硅氧树脂材料热变性方面的研究范围。
The polysiloxanes molecular structure had been studied by one-dimensional infrared spectroscopy, second derivative infrared spectroscopy and fourth derivative infrared spectroscopy with fourier transform attenuated total reflection infrared spectroscopy （ATR-FTIR）in the temperature range from 303 K to 393 K.The CH 3 stretch vibration mode （νCH3 ）,the CH 3 bending vibration mode （δCH3 ）,the CH 3 swing vibration mode （ρCH3 ）,the Si-O stretch vibration mode （νSi-O ）and the Si-C stretch vibration mode （νSi-C ）were found from 1800 cm-1 to 600 cm-1 .The tempe-rature effect of the polysiloxanes molecular structure had been studied byνSi-O from 1 100 cm-1 to 1000 cm-1 and red shift was found obviously.Two-dimensional infrared spectroscopy of polysiloxanes was studied to determine the se-quence of intensity changes.It had been found that the sequence of intensity changes was 1024 cm-1 ＆gt; 1096 cm-1 ＆gt;1010 cm-1 ＆gt; 1076 cm-1 ＆gt; 1083 cm-1 ＆gt; 1064 cm-1 with the increase of temperature.The study demonstrated the key roles of ATR-FTIR in the analysis of thermal denaturation of the polysiloxanes.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2015年第16期67-71,共5页
Materials Reports
基金
河北省科技厅科学技术研究与发展计划(10215687)
石家庄市科学技术研究与发展计划课题(131500142A)
石家庄学院校级科研平台资助项目(XJPT008)
关键词
一维红外光谱
二阶导数红外光谱
四阶导数红外光谱
二维红外光谱
硅氧树脂
热变性
one-dimensional infrared spectroscopy, second derivative infrared spectroscopy, fourth derivativeinfrared spectroscopy, two-dimensional infrared spectroscopy, polysiloxanes, thermal denaturation
