SAXS-Fiber Computer Tomography. Method Enhancement and Analysis of Microfibrillar-Reinforced Composite Precursors from PEBA and PET

被引：20

作者：

Stribeck, Norbert ^{[1
]}

Noechel, Ulrich ^{[1
]}

Fakirov, Stoyko ^{[2
]}

Feldkamp, Jan ^{[3
]}

Schroer, Christian ^{[3
]}

Timmann, Andreas ^{[4
]}

Kuhlmann, Marion ^{[4
]}

机构：

[1] Univ Hamburg, Inst Tech & Macromol Chem, Dept Chem, D-20146 Hamburg, Germany

[2] Univ Auckland, Dept Mech Engn, Auckland 1, New Zealand

[3] Tech Univ Dresden, Inst Struct Phys, D-01062 Dresden, Germany

[4] DESY, HASYLAB, D-22603 Hamburg, Germany

来源：

MACROMOLECULES | 2008年 / 41卷 / 20期

关键词：

D O I：

10.1021/ma8015322

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The nanostructure gradient along the fiber radius inside polymer strands is uncovered by small-angle X-ray scattering (SAXS) microbeam-scanning experiments and X-ray scattering fiber computer-tomography (XSF-CT) analysis. We notice restricted visibility of scattering features within the series of patterns. The reason is violation of local fiber symmetry (LFS) in the irradiated Volume elements (voxels). For its theoretical treatment, a set of elementary topologies (tangential grain, radial grain) is introduced. Systematic aberrations (ultrareconstruction. infrareconstruction) generated by tomographic reconstruction of affected series are described. A concept for handling and utilization of these aberrations for nanostructure analysis is devised. Precursors of polymer microfibrillar-rein forced composites (MFC) containing poly(ether)-block-amide (PEBA) and poly(ethylene terephthalate) (PET) with varying cold-draw ratio are studied. We compare results from a direct analysis of the smeared measured patterns to results obtained after tomographic reconstruction and fathom the power of reconstruction methods. Ideas for advanced practical applications of the XSF-CT method are discussed.

引用

页码：7637 / 7647

页数：11

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