一 前言 近年来,高分子材料的品种不断增多,并常常共聚少量的第二或第三组分进行改性或控制高分子的序列结构,使高分子材料具有更优良的性能和更广泛的用途。这类高聚物即使在专门化的实验室里,用红外光谱(IR)和核磁共振(NMR)等方法直接鉴定也 A foreword In recent years, the increasing variety of polymer materials, and often copolymerization of a small amount of second or third component to modify or control the polymer sequence structure, the polymer material has more excellent performance and a wider range of uses . Even in specialized laboratories, these polymers are directly identified by methods such as infrared spectroscopy (IR) and nuclear magnetic resonance (NMR)