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首页> 外文期刊>Advanced Materials >Three-Dimensional Imaging of Semicrystalline Polypropylene with 10 nm Resolution
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Three-Dimensional Imaging of Semicrystalline Polypropylene with 10 nm Resolution

机译：半结晶聚丙烯的10 nm分辨率三维成像

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摘要

Elastomeric polypropylene (ePP) is composed of blocks of isotactic and atactic stereosequences. On the 10-100 nm scale, the material is composed of crystalline and amorphous parts,'1"3' Its rubber-like behavior is caused mainly by isolated crystallites that are embedded in an amorphous matrix and that form physical crosslinks between the chains. The number, the shape, and the spatial arrangement of the crystallites are crucial parameters to the elasticity and strength of the material.'4"6' The polymer-crystallization process itself is also a topic of great current interest.'71 With X-ray scattering, only ensemble averages of the lamella thickness, the size of the aggregates, and the orientation of the crystallites can be measured. Imaging the three-dimensional (3D) microstructure is complicated by the small sizes of the crystalline lamellae, which are only -10 nm wide. With electron microscopy and scanning force microscopy (SFM), the surface of thin films^' or their cross-sections (microtomed slices)'9' can be imaged. Figure 1 shows the typical dendritic, irregular structure of the crystallites on a length scale of 10-100 nm. These methods, however, give only a two-dimensional (2D) view of the microstructure.
机译：弹性聚丙烯（ePP）由等规和无规立体序列块组成。在10-100 nm的范围内，该材料由结晶和无定形部分组成，“ 1”“ 3”。其橡胶状行为主要是由嵌入无定形基质中并在链之间形成物理交联的孤立微晶引起的。微晶的数量，形状和空间排列是材料弹性和强度的关键参数。'4“ 6'聚合物结晶过程本身也是当前引起人们极大关注的主题。'71X-通过射线散射，只能测量薄片厚度，聚集体的大小和微晶的取向的整体平均值。三维（3D）微观结构的成像因晶体薄片的小尺寸（仅-10 nm宽）而变得复杂。利用电子显微镜和扫描力显微镜（SFM），可以对薄膜的表面''或它们的横截面（切片的切片）'9'成像。图1显示了10-100 nm长度范围内微晶的典型树枝状，不规则结构。但是，这些方法仅给出了微观结构的二维（2D）视图。

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  • 来源
    《Advanced Materials》 |2005年第18期|p. 2203-2206|共4页
  • 作者

    Nicolaus Rehse; Sabine Man; Sabine Scherdel; Robert Magerle;

  • 作者单位

    Physikalische Chemie II, Universitat Bayreuth, D-95440 Bayreuth, Germany;

    Physikalische Chemie II, Universitat Bayreuth, D-95440 Bayreuth, Germany;

    Physikalische Chemie II, Universitat Bayreuth, D-95440 Bayreuth, Germany;

    Physikalische Chemie II, Universitat Bayreuth, D-95440 Bayreuth, Germany;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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