A nanoscopic view at the spherulitic morphology of isotactic polypropylene by atomic force microscopy
A nanoscopic view at the spherulitic morphology of isotactic polypropylene by atomic force microscopy
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通过原子力显微镜观察等规聚丙烯球晶形态的纳米级视图
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
G. J. Vansco
中科院分区：
文献类型：
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作者：
H. Schönherr;D. Snétivy;G. J. Vansco
用光学显微镜和原子力显微镜相结合的方法研究了等规聚丙烯(i-PP)的球晶形态。利用热台原位法制备了i-PP薄膜。结晶条件被精心选择，以产生不同类型的球晶，包括α-I、α-II、混合球晶和β-III球晶。原子力显微镜(AFM)扫描揭示了形态细节，如母子板层、交叉影线以及板层的厚度和方向。在少数情况下，可以看到大分子。然而，由于分辨率较差，只能确定片层内预期的链方向。讨论了用原子力显微镜研究球晶表面的优缺点。
SummaryThe spherulitic morphology of isotactic polypropylene (i-PP) was investigated by a combination of optical and atomic force microscopes. Thin films of i-PP were prepared in situ by using a hot stage. The crystallization conditions were carefully selected to produce different types of spherulites including α-I, α-II, mixed, and β-III types. Atomic force microscopy (AFM) scans unveiled morphological details such as mother/daughter lamellae, cross-hatching, and thickness and orientation of the lamellae. In a few cases, macromolecules were visualized. However, due to poor resolution, only the expected chain direction within the lamellae could be determined. The advantages and disadvantages of using AFM to study the surface of spherulites is discussed.