酚醛树脂基玻璃炭结构的显微激光喇曼光谱研究  

STUDY ON THE GLASS-LIKE CARBON DERIVED FROM PHENOLIC RESIN BY LASER RAMAN MICRO-SPECTROSCOPY

作　　者：涂建华[1] 张利波[1] 彭金辉[1] 张世敏[1] 普靖中[1] 夏洪应[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《高分子材料科学与工程》2005年第6期205-208,共4页Polymer Materials Science & Engineering

基　　金：云南省自然科学基金资助项目(2003E0012Q)

摘　　要：采用显微激光喇曼光谱,考察了以热固性酚醛树脂为原料制备玻璃炭过程中碳结构的变化特征,通过对样品的喇曼光谱图进行分析,详细讨论了炭化温度对玻璃炭结构的影响。结果表明,773 K以上制备的样品其一级喇曼光谱D线波数在1346 cm-1~1354 cm-1之间,G线在1591 cm-1~1599 cm-1之间,且根据二者的积分强度比计算得到样品的无序度R值随温度升高而减小;同时利用T u instra-K oen ing经验式计算得到样品中石墨微晶的大小,是随温度升高而从1.86 nm增加到3.28 nm;说明随炭化温度的升高有利于玻璃炭结构无序度的减小,以及微晶尺寸的增大;进一步分析发现,在773 K^973K间是炭化发生最快的阶段,而1173 K^1373 K和1573 K^1773 K温度区间则是玻璃炭结构转变较快的阶段。A series of glass-like carbon samples derived from phenolic resin were studied by the laser Raman micro-spectroscopy. The structural changes of samples with carbonization temperature were discussed via spectral analysis. As the results, the spectra show the known D and G bands with varying characteristics. The D-band Raman shift is 1346 cm^-1～1354 cm^-1, G-band Raman shift is 1591 cm^-1～1599 cm^-1. An analysis of the spectra allows the inference of internal physical characteristics of the samples such as the full widths at half maximum （FWHM）, the degree of disorder, which is the integrated intensity ratio R=ID/IC, and the size of microcrystalline （Ls）, which is calculated by the Tuinstra-Koening empirical relation. A decrease of the samples＇ FWHM and R-value with increasing of carbonization temperature was reported. And I.a of these samples show low microcrystalline size, i.e. L, varies between 1.86 nm and 3.28 nm. The obtained results indicate that increases of order and crystallite size of glass-like carbon are reflected by an increase of temperature.

关 键 词：酚醛树脂 玻璃炭 喇曼光谱 结构 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]