Problems relating to long period determination in polyethylene shish‐kebab structures
作者:
G. H. Michler,
I. Naumann,
F. J. Baltá Calleja,
F. Ania,
期刊:
Acta Polymerica
(WILEY Available online 1997)
卷期:
Volume 48,
issue 1‐2
页码: 36-40
ISSN:0323-7648
年代: 1997
DOI:10.1002/actp.1997.010480106
出版商: Akademie Verlag GmbH
数据来源: WILEY
摘要:
AbstractThe X‐ray long periods from high molecular weight injection molded polyethylene (PE) with a shish‐kebab structure have been compared with values derived from electron micrographs. It is shown that while small angle X‐ray scattering (SAXS) presents two long periods, the direct measurements from transmission electron microscopy (TEM) furnish only the lower SAXS periodicity. In an attempt to clarify this discrepancy of results, laser light diffraction and Fourier transformation of electron micrographs have been undertaken. Using this method two long periods are found in all regions investigated. Results are discussed in terms of the role played by the structured or “weakly crystalline” interlamellar parts, containing a lower electron density, which are neglected by the small angle scattering of X‐rays and which give rise in particular regions to larger scattering pe
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