中文摘要：

应用衰减全反射傅里叶变换红外光谱法（ATR-FTIR）对聚丙烯共混薄膜的表面组成进行了测试。通过比尔定律的验证,确认1103和1733cm^-1可以分别用于含聚乙二醇和含羰基结构单元的改性剂共混体系的定量计算。利用ATR校正程序,以相应的特征峰峰面积比作为定量测定的基准,可以减少测试误差。通过工作曲线法,定量地分析了聚丙烯共混物薄膜表层中改性剂的含量。此外,利用变角全反射,通过改变入射光线的角度,可以测定不同深度的改性剂含量,剖析改性剂在PP共混薄膜的表层分布。

英文摘要：

The surface composition and structure of solid organic polymers influence many of their properties and applications. Oligomers such as poly（ethylene glycol） （PEG）, poly（methyl methacrylate） （PMMA） poly（butyl methacrylate） （PBMA） and their graft copolymers of polybutadiene and polypropylene were used as the macromolecular surface modifiers of polypropylene. The compositions on surface and in bulk of the polypropylene（PP） blends were determined quantitatively using attenuated total reflectance FTIR spectroscopic （ATR-FTIR） technique with a variable-angle multiple-reflection ATR accessory and FTIR measurements, respectively. By validating by Lambert-Beer law, 1 103 and 1 733 cm^-1 can be used to represent modifiers characteristic absorbance band to determine quantitatively the surface composition of modifiers including poly（ethylene glycol） and earbonyl segment in PP blends, respectively. The determination error can be effectively eliminated by calibrating wavelength and using absorption peak area ratio as the calibrating basis for the quantitative analysis. To minimize the effect of contact between the polymer film and the internal reflection element on the results of absolute absorbance, the technique of ＂band ratioing＂ was developed, and it was testified that the error of the peak area ratios of interest can be reduced to 5% or below, which was suitable for ATR-FTIR used as a determining quantitative tool for surface composition. The working curves were then established and used to calculate the composition of the responding functional groups in the film surface of the PP blends. The depth distribution of modifiers on the surface of blend films also can be determined by changing the incident angle of interest on the basis of the equation of the depth of penetration of the excursion wave in ATR spectra. The results indicated that ATR-FTIR can be used to determine quantitatively the surface composition and distribution of modifiers with reproducible and reliable measurement r