【摘要】 由聚丙烯的¹³C NMR 谱计算出全同二单元组 meso dyad（m）以及连续均为m/长度由 n 到∞ 的生成几率 P_m≥n 等数据,讨论了它们和 FT-IR 测量得到的一些特征吸收峰吸光度比值之间的相关性。指出红外谱的 A₉₉₈/A₁₄₅₆,A₁₁₅₆/A₁₄₅₆等吸光度比值和 P_m 之间相关性不佳,但 A₉₇₃/A₁₄₅₆的比值和 P_m 间却有较好的线性关系,给出了相关方程。更多还原

【Abstract】 The generating probability of meso dyad and meso blocks with lengthfrom n to ∞,P_m and P_m≥nfor polypropylene were calculated from ¹³C-NMR spectra based on a statistical biactive center model.A combination of¹³C-NMR,IR data and the statistical model was used to establish the calibra-tion of absorbance ratio of IR bands in stereoregularity analysis.The corre-lation between P_m and the relative absorbance of IR regularity bands to thatof 1456cm^-1band does not coincide with the available conclusion in litera-tures.The absorbance ratio of the 973cm^-1band to the internal thicknessband of 1456cm^-1shows satisfactory correlation with parameter P_m.A quan-titative determination of P_m in polypropylene was established by using theabsorbance ratio of A₉₇₃/A₁₄₅₆.更多还原