Effect of Structural Inhomogeneity on Mechanical Behavior of Injection Molded Polypropylene Investigated with Microbeam X-ray Scattering

2012 ◽  
Vol 45 (3) ◽  
pp. 1398-1407 ◽  
Author(s):  
Yuya Shinohara ◽  
Kosuke Yamazoe ◽  
Takashi Sakurai ◽  
Shuichi Kimata ◽  
Toshiya Maruyama ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Structural Inhomogeneity ◽  
X Ray ◽  
X Ray Scattering ◽  
Injection Molded ◽  
Ray Scattering

scholarly journals Process Induced Skin-Core Morphology in Injection Molded Polyamide 66

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 894
Author(s):  
Yvonne Spoerer ◽  
René Androsch ◽  
Dieter Jehnichen ◽  
Ines Kuehnert
Keyword(s):  
Polarized Light ◽  
Skin Layer ◽  
Crystalline Morphology ◽  
Polyamide 66 ◽  
Thin Sections ◽  
X Ray ◽  
X Ray Scattering ◽  
Order Of Magnitude ◽  
Injection Molded ◽  
Ray Scattering

Polyamide 66 (PA 66) was injection-molded to obtain samples with a structure gradient between skin and core, as it was revealed by analysis of the semi-crystalline morphology using polarized-light optical microscopy (POM). Wide-angle X-ray scattering (WAXS) and small-angle X-ray scattering (SAXS) were employed to characterize thin sections with a thickness in the order of magnitude of 50 µm, allowing detection of crystals of different perfection, as a function of the distance from the surface. It was found that the transparent and non-spherulitic skin layer contains rather imperfect α-crystals while the perfection of α-crystals continuously increases with extending distance from the surface. Since variation of the molding conditions allows tailoring the skin-core morphology, the present study was performed to suggest a reliable route to map the presence of specific semi-crystalline morphologies in such samples.

scholarly journals Dynamical sound speed and structural inhomogeneity in liquid Te studied by inelastic x-ray scattering

2019 ◽  
Vol 1 ◽  
pp. 100006 ◽  
Author(s):  
Masanori Inui ◽  
Yukio Kajihara ◽  
Shinya Hosokawa ◽  
Kazuhiro Matsuda ◽  
Yoshimi Tsuchiya ◽  
...  
Keyword(s):  
Sound Speed ◽  
Structural Inhomogeneity ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Macroscopically homogeneous deformation in injection molded polypropylene induced by annealing studied with microbeam X-ray scattering

Polymer ◽  
2015 ◽  
Vol 70 ◽  
pp. 315-325 ◽  
Author(s):  
Kazuya Matsui ◽  
Akinori Bando ◽  
Takashi Sakurai ◽  
Yuya Shinohara ◽  
Toshiya Maruyama ◽  
...  
Keyword(s):  
Homogeneous Deformation ◽  
X Ray ◽  
X Ray Scattering ◽  
Injection Molded ◽  
Ray Scattering

scholarly journals Simultaneous SAXS-WAXS Experiments on Semi-Crystalline Polymers: Example of PA11 and Its Brill Transition

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 271 ◽  
Author(s):  
Sylvie Tencé-Girault ◽  
Sylvie Lebreton ◽  
Oana Bunau ◽  
Patrick Dang ◽  
François Bargain
Keyword(s):  
Mechanical Behavior ◽  
Morphological Evolution ◽  
Polymeric Materials ◽  
Scanning Calorimetry ◽  
Polyamide 11 ◽  
X Ray ◽  
Crystalline Polymers ◽  
X Ray Scattering ◽  
The Hierarchical Structure ◽  
Ray Scattering

This manuscript of the special issue “Microstructural Evolution and Mechanical Behavior of Semi-Crystalline Polymers” aims to show that Small Angle X-ray Scattering (SAXS) and Wide Angle X-ray Scattering (WAXS) experiments performed simultaneously constitute a unique tool to obtain valuable information on the hierarchical structure of semi-crystalline polymers. These structural quantitative data are needed to model macroscopic properties of polymeric materials, for example their mechanical properties. To illustrate our point, we focus our study on the structure and morphology of polyamide 11. Through a simultaneous SAXS-WAXS experiment, we show that the absence of enthalpic signal in Differential Scanning Calorimetry (DSC) is not synonymous with the absence of structural and morphological evolution with temperature. The case of a thermally activated crystal–crystal transition, the Brill transition, is particularly detailed. Through this SAXS-WAXS study, we show, among other points, and for the first time, that the periodicity of crystalline lamellae (LP) changes at the transition, probably due to a modification of the amorphous phase’s free volume at the Brill transition. We also explain the crucial role of annealing to stabilize polymeric materials that may experience temperature changes over their lifetime. The influence of the annealing on the perfection of crystalline structure, morphology and mechanical behavior is more particularly studied.

scholarly journals An X-ray scattering study of water-conditioned injection-molded starch during isothermal heating

2003 ◽  
Vol 88 (1) ◽  
pp. 17-21 ◽  
Author(s):  
M. E. Cagiao ◽  
R. K. Bayer ◽  
D. R. Rueda ◽  
F. J. Baltá Calleja
Keyword(s):  
Isothermal Heating ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Injection Molded ◽  
Ray Scattering

scholarly journals Studying nanostructure gradients in injection-molded polypropylene/montmorillonite composites by microbeam small-angle x-ray scattering

2014 ◽  
Vol 15 (1) ◽  
pp. 015004 ◽  
Author(s):  
Norbert Stribeck ◽  
Konrad Schneider ◽  
Ahmad Zeinolebadi ◽  
Xuke Li ◽  
Catalina-Gabriela Sanporean ◽  
...  
Keyword(s):  
Small Angle ◽  
X Ray ◽  
X Ray Scattering ◽  
Injection Molded ◽  
Ray Scattering
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