摘要
本文提出一种以红外光谱法分析铺路橡胶沥青样品中含胶量（苯乙烯、丁二烯共聚胶，简称ＳＢＲ）的有效方法。分别以胶和沥青中基团的吸收峰９６５ｃｍ－１与８１０ｃｍ－１为分析基准。设计由此二峰的吸光度比（Ａ９６５／Ａ８１０）与已知含胶量关联作出标准曲线，用最小二乘法获得关联方程ｙ＝１．０５７ｘ＋０．２７０９（ｒ＝０．９９９５），式中ｙ＝吸光度比，ｘ＝样品含胶量（％）。本法重现性好、准确度较高与前处理简单，适用于分析未知含胶量的橡胶沥青及类似样品。
n infrared spectrum methed is developed for the determination of the rubber(styrene-butadiene rubber,SBR)in the rubber-asphalt.The rubber-asphalt is dissolved in CS2 and the infrared absorbance at 965 cm-1 and 810 cm-1 are determined for rubber and asphalt, respectively.The linearity of the calibration curve as A965/A810 vs rubber content is satisfactory(r=0.9995).The method is simple and its reproducibility is good.
关键词
红外光谱法
橡胶沥青
含胶量
infrared spectrum
rubber-asphalt
pavement.
