【摘要】 聚合物薄膜在微电子领域中的应用日益增加.聚ε-己内酯/聚氯乙烯(PCL/PVC)是研究得最广泛的聚合物共混薄膜之一.PCL与PVC以一定比例混合时,可以形成环带球晶;同时,体系分为结晶PCL相及PCL/PVC非晶混溶相.用XPS和成象XPS分析技术,对PCL/PVC膜的表面化学组成和元素分布情况进行了研究.观察到PCL在薄膜表面富集.此外,成象XPS表明,PVC在球晶边界处富集,且球晶边界宽度约15μm.更多还原

【Abstract】 s Recently,polymer thin films have been increasingly used in microelectronic applications.Poly(ε caprolactone)/poly(vinyl chloride) (PCL/PVC) blends are widely studied polymers.When PCL and PVC are blended in certain ratio,ring banded spherulites are formed and the blends are often composed of a PCL crystal phase and a PCL/PVC amorphous phase.Optical microscopy,atomic force microscopy and angle dependent XPS analyses were used by many scientists to investigate the morphology and composition of the PCL/PVC films.Using XPS and imaging XPS analyses,we have investigated the surface chemical composition and elemental distribution of PCL/PVC films.The results show that PCL enriches to the PCL/PVC polymer air interface.Besides,the imaging XPS analysis indicates that PVC is concentrated at the spherulite boundaries and the width of the boundaries is about 15 μ m.These observations may be valuable for the explanation of the crystallization and morphological behaviors of polymer blends.更多还原