메뉴 건너뛰기




Volumn 43, Issue 11, 2010, Pages 5009-5015

Small-angle X-ray scattering on melt-spun polypropylene fibers: Modeling and data reduction

Author keywords

[No Author keywords available]

Indexed keywords

CRYSTALLINE ORIENTATIONS; DEGREE OF ORIENTATION; LATTICE DISTORTIONS; MELT-SPUN; ORIENTATION FUNCTION; POLYPROPYLENE FIBER; SEMI-CRYSTALLINE POLYMER; SMALL ANGLE X-RAY SCATTERING; SPINLINE; STRUCTURAL PARAMETER;

EID: 77953149918     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma902414b     Document Type: Article
Times cited : (12)

References (61)
  • 37
    • 77953161688 scopus 로고
    • Diploma Thesis, Universität Ulm
    • Göttlicher, K. Diploma Thesis, Universität Ulm, 1981.
    • (1981)
    • Göttlicher, K.1
  • 39
    • 77953173590 scopus 로고
    • Ph.D. Thesis, Universität Ulm
    • Fronk, W. Ph.D. Thesis, Universität Ulm, 1984.
    • (1984)
    • Fronk, W.1
  • 43
    • 77953161886 scopus 로고    scopus 로고
    • A 100% high molecular sample could not be extruded because of the increased viscosity of the material
    • A 100% high molecular sample could not be extruded because of the increased viscosity of the material.
  • 47
    • 77953174520 scopus 로고    scopus 로고
    • * = 0 and π
    • * = 0 and π.
  • 50
    • 77953143139 scopus 로고    scopus 로고
    • note
    • When we are dealing with semicrystalline polymers, we can presume a "paracrystalline lattice". This means that the crystalline lattice finds itself subjected to distortions of the second kind (distortions of the first kind describe a situation where the objects are still in a regular lattice but vary around their designated position as given with random thermal displacements): Starting from a chosen origin the next neighbors distance is not constant but varying. Different distributions for the distance function have been proposed in literature. Crist has shown that usually a symmetric or slightly skewed distribution is best suited to describe the actual SAXS data. (60, 61) We therefore used a Gaussian distribution for the next neighbor distance. The whole lattice builds on the varying distance principle; therefore, we loose all long-range order, and higher order reflections in scattering experiments are usually negligible. This can also be observed in semicrystalline polymers. A significant advantage of this model is that it can be analyzed analytically: the lattice factor can be directly calculated as the absolute squared of the Fourier transform of such a lattice. (38, 40, 48)
  • 54
    • 77953148232 scopus 로고    scopus 로고
    • A closer analysis of the simulations has shown that with increasing orientation the scattering profile of the complete orientation model and a simplified model without orientation on the meridian become similar. We can therefore ignore the scattering contribution of the radial part and use the simplified model for a faster fit of the parameters L, g, and H.
    • A closer analysis of the simulations has shown that with increasing orientation the scattering profile of the complete orientation model and a simplified model without orientation on the meridian become similar. We can therefore ignore the scattering contribution of the radial part and use the simplified model for a faster fit of the parameters L, g, and H.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.