Probing the Early Stages of Melt Crystallization in Polypropylene by Simultaneous Small- and Wide-Angle X-ray Scattering and Laser Light Scattering

2000 ◽  
Vol 33 (3) ◽  
pp. 978-989 ◽  
Author(s):  
Zhi-Gang Wang ◽  
Benjamin S. Hsiao ◽  
Eric B. Sirota ◽  
Pawan Agarwal ◽  
Srivatsan Srinivas
Keyword(s):  
Light Scattering ◽  
Laser Light ◽  
Laser Light Scattering ◽  
Wide Angle ◽  
Melt Crystallization ◽  
X Ray ◽  
Early Stages ◽  
X Ray Scattering ◽  
Ray Scattering

High-pressure cell for simultaneous small-angle x-ray scattering and laser light scattering measurements

2001 ◽  
Vol 72 (6) ◽  
pp. 2679-2685 ◽  
Author(s):  
Tadanori Koga ◽  
Shuiqin Zhou ◽  
Benjamin Chu ◽  
John L. Fulton ◽  
Shu Yang ◽  
...  
Keyword(s):  
High Pressure ◽  
Light Scattering ◽  
Small Angle ◽  
Laser Light ◽  
Laser Light Scattering ◽  
High Pressure Cell ◽  
X Ray ◽  
Pressure Cell ◽  
X Ray Scattering ◽  
Scattering Measurements

Combined small- and wide-angle X-ray scattering study of early stages of polymer crystallization

2003 ◽  
Vol 36 (4) ◽  
pp. 991-994 ◽  
Author(s):  
P. Panine ◽  
V. Urban ◽  
P. Boesecke ◽  
T. Narayanan
Keyword(s):  
Single Photon ◽  
Early Stage ◽  
Onset Time ◽  
Degree Of Crystallinity ◽  
Photon Flux ◽  
Wide Angle ◽  
X Ray ◽  
Early Stages ◽  
X Ray Scattering ◽  
Ray Scattering

The early stage of melt crystallization in low-density polyethylene was investigated by simultaneous time-resolved small-angle and wide-angle X-ray scattering (SAXS/WAXS) techniques. The high detectivity of the two-dimensional detectors together with the large photon flux of an undulator source permitted the collection of SAXS and WAXS patterns with nearly single-photon sensitivity and sub-second time resolution. As a result, the crystalline fraction well below 0.001 can be reliably detected and the apparent induction time is considerably reduced (<10 s). The time evolution of both the SAXS invariant and the degree of crystallinity follow the well established Avrami-type growth law. Despite the orders of magnitude improvement in sensitivity, the difference in the onset time of SAXS and WAXS signals is not significant. The behaviour of the SAXS data in the very early stages is not consistent with spinodal decomposition mechanism as described by the linearized Cahn–Hilliard theory.

A Revised O2 Reduction Model in Li-O2 Batteries as Revealed by in Situ Small Angle X-Ray Scattering

2019 ◽  
Author(s):  
Christian Prehal ◽  
Aleksej Samojlov ◽  
Manfred Nachtnebel ◽  
Manfred Kriechbaum ◽  
Heinz Amenitsch ◽  
...  
Keyword(s):  
Small Angle ◽  
Wide Angle ◽  
Reduction Mechanism ◽  
Reduction Model ◽  
X Ray ◽  
X Ray Scattering ◽  
O2 Reduction ◽  
Ray Scattering

<b>Here we use in situ small and wide angle X-ray scattering to elucidate unexpected mechanistic insights of the O2 reduction mechanism in Li-O2 batteries.<br></b>

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