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以聚丙烯微孔膜为基材，通过扩散控制原位共聚合的方法在膜内填充了组成沿膜的厚度方向逐渐改变的无规共聚物，Ｘ－－光电子能谱（ＸＰＳ）、全反射红外光谱（ＡＴＲ）以及动态粘弹谱的分析结果，说明所制备得到的复合膜具有明显的渐变聚合物性质。
Using polypropylene microporous membrane as substrate, the film was filled with random copolymers whose composition gradually changed along the thickness of the film by diffusion-controlled in situ copolymerization. X-ray photoelectron spectroscopy (XPS), total reflection The results of infrared spectroscopy (ATR) and dynamic viscoelastic spectroscopy show that the prepared composite films have obvious graded polymer properties.