论文部分内容阅读
利用原子力显微镜(AFM)的轻敲模式,研究了聚ε-己内酯/聚氯乙烯(PCL/PVC)(质量比90∶10)共混体系形成的环带球晶的表面形态和片晶结构.PCL/PVC环带球晶的表面由周期性高低起伏的环状结构组成,其凸凹起伏的周期与球晶在偏光显微镜下的明暗交替的周期相对应.这种周期性的凸凹起伏和明暗交替消光的原因是由不同取向的片晶交替排列造成的,片晶在凹下环带区域的排列主要是Flat-on取向,而凸起环带区域的片晶排列主要是Edge-on取向.同时用原子力显微镜原位观察了PHB-co-HHx共聚物环带球晶生长时片晶的动态扭转过程,初步的研究结果发现片晶的扭转不是均匀连续的,而是出现在相对较窄的区域.
The tapping mode of atomic force microscopy (AFM) was used to study the surface morphology of ring-shaped spherulites and the lamellae formed by the blend system of poly-ε-caprolactone / polyvinyl chloride (PCL / PVC) Structure.The surface of PCL / PVC ring-spherulites consists of cyclical fluctuating ring-shaped structures, and the cycle of the convexo-concave undulations corresponds to the alternating cycles of light and dark of spherulites under a polarized light microscope. The reason for alternating light and darkness is due to the alternating arrangement of platelets with different orientations. The arrangement of platelets in the depressed annular zone is mainly Flat-on orientation, while the arrangement of platelets in the raised annular zone is mainly Edge-on orientation At the same time, the dynamic torsion of platelet spherulites during ring growth of PHB-co-HHx copolymer was observed by atomic force microscopy in situ. The preliminary study shows that the twisting of platelets is not uniform and continuous, Area.