The phase structures of nylon 6.6 as studied by temperature-modulated calorimetry and their link to X-ray structure and molecular motion

Polymer ◽  
2007 ◽  
Vol 48 (6) ◽  
pp. 1641-1650 ◽  
Author(s):  
Wulin Qiu ◽  
Anton Habenschuss ◽  
Bernhard Wunderlich
Keyword(s):  
Molecular Motion ◽  
X Ray ◽  
Phase Structures ◽  
Temperature Modulated Calorimetry

Molecular Motion and Conformational Interconversion of Azobenzenes in Crystals as Studied by X-ray Diffraction

1997 ◽  
Vol 53 (4) ◽  
pp. 662-672 ◽  
Author(s):  
J. Harada ◽  
K. Ogawa ◽  
S. Tomoda
Keyword(s):  
Temperature Dependence ◽  
Crystal Structures ◽  
Torsional Vibration ◽  
Molecular Motion ◽  
X Ray Diffraction ◽  
Dynamic Disorder ◽  
X Ray ◽  
Conformational Interconversion ◽  
Free Molecules

Crystal structures of (E)-azobenzene (1), (E)-2,2′- dimethylazobenzene (2), (E)-3,3′-dimethylazobenzene (3) and (E)-4,4′-dimethylazobenzene (4) were determined by X-ray diffraction at various temperatures. An apparent shrinkage of the N=N bond and its temperature dependence were observed and are interpreted in terms of an artifact caused by the torsional vibration of the N—Ph bonds in crystals. In the crystal structures of (1), (3) and (4) the dynamic disorder was observed. The disorder is accounted for by the torsional vibration whose amplitude is large enough to give rise to the conformational interconversion. No disorder was observed for a crystal of (2). This is ascribed to the large difference in energy of the two conformers as free molecules. The true length of the N=N bond in azobenzenes was estimated to be 1.26–1.27 Å.

Molecular Motion in Crystalline Naphthalene:  Analysis of Multi-Temperature X-Ray and Neutron Diffraction Data

2006 ◽  
Vol 110 (41) ◽  
pp. 11695-11703 ◽  
Author(s):  
Silvia C. Capelli ◽  
Alberto Albinati ◽  
Sax A. Mason ◽  
Bertram T. M. Willis
Keyword(s):  
Neutron Diffraction ◽  
Diffraction Data ◽  
Molecular Motion ◽  
Neutron Diffraction Data ◽  
X Ray

The 1-Monooleoyl-rac-glycerol/n-Octyl-β-d-Glucoside/Water System. Phase Diagram and Phase Structures Determined by NMR and X-ray Diffraction

Langmuir ◽  
2003 ◽  
Vol 19 (14) ◽  
pp. 5813-5822 ◽  
Author(s):  
Gerd Persson ◽  
Håkan Edlund ◽  
Heinz Amenitsch ◽  
Peter Laggner ◽  
Göran Lindblom
Keyword(s):  
Phase Diagram ◽  
Water System ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Structures ◽  
System Phase Diagram ◽  
System Phase

XRD Evidence for Phase Structures of Niobium Alloyed Austempered Ductile Iron

2012 ◽  
Vol 457-458 ◽  
pp. 431-434
Author(s):  
Bulan Abdullah ◽  
Siti Khadijah Alias ◽  
Ahmed Jaffar ◽  
Saad Nor Hayati ◽  
Mohd Faizul Idham ◽  
...  
Keyword(s):  
Ductile Iron ◽  
Phase Structure ◽  
Niobium Carbide ◽  
Lower Bainite ◽  
Salt Bath ◽  
X Ray Diffraction ◽  
X Ray ◽  
Phase Structures ◽  
Upper Bainite ◽  
Bath Furnace

This paper presents the changes on phase structures of niobium alloyed ductile iron after austempering process which started by austenitizing process at 900°C and held at 350°C for 1 hour, 2 hours and 3 hours in salt bath furnace. The phase structure were observed by light microscope, and then verified through X-Ray diffraction (XRD). The phase structure of as cast niobium alloyed ductile iron mainly consists of graphite nodules embedded in ferrite and pearlite phases with presence of niobium carbide. Austempering process resulted in the structure of graphite nodules embedded in ferrite platelets and bainitic structures. Increasing the austempering holding times had resulted in coarsening of the ferrite platelets structures and transformation from lower bainite to upper bainite structures.

scholarly journals Viscosity and real-space molecular motion of water: Observation with inelastic x-ray scattering

2018 ◽  
Vol 98 (2) ◽  
Author(s):  
Yuya Shinohara ◽  
Wojciech Dmowski ◽  
Takuya Iwashita ◽  
Bin Wu ◽  
Daisuke Ishikawa ◽  
...  
Keyword(s):  
Molecular Motion ◽  
Real Space ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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