Condensed Mode Cooling for Ethylene Polymerization: Part IV. The Effect of Temperature in the Presence of Induced Condensing Agents

2017 ◽  
Vol 218 (20) ◽  
pp. 1700248 ◽  
Author(s):  
Fabiana N. Andrade ◽  
Timothy F. L. McKenna
Keyword(s):  
Ethylene Polymerization ◽  
Effect Of Temperature ◽  
Condensing Agents

Condensed Mode Cooling for Ethylene Polymerization: Part III. The Impact of Induced Condensing Agents on Particle Morphology and Polymer Properties

2016 ◽  
Vol 217 (13) ◽  
pp. 1521-1528 ◽  
Author(s):  
Montree Namkajorn ◽  
Arash Alizadeh ◽  
Dario Romano ◽  
Sanjay Rastogi ◽  
Timothy F. L. McKenna
Keyword(s):  
Ethylene Polymerization ◽  
Particle Morphology ◽  
Polymer Properties ◽  
The Impact ◽  
Condensing Agents

Condensed Mode Cooling for Ethylene Polymerization: Part I. The Effect of Different Induced Condensing Agents on Polymerization Rate

2015 ◽  
Vol 216 (8) ◽  
pp. 903-913 ◽  
Author(s):  
Arash Alizadeh ◽  
Montree Namkajorn ◽  
Ekasith Somsook ◽  
Timothy F. L. McKenna
Keyword(s):  
Ethylene Polymerization ◽  
Polymerization Rate ◽  
Condensing Agents

The effect of temperature on ethylene polymerization over flat Phillips model catalysts

2006 ◽  
Vol 240 (1) ◽  
pp. 39-46 ◽  
Author(s):  
E VANKIMMENADE ◽  
J LOOS ◽  
J NIEMANTSVERDRIET ◽  
P THUNE
Keyword(s):  
Ethylene Polymerization ◽  
Model Catalysts ◽  
Effect Of Temperature ◽  
Phillips Model

Nucleation of Disorder in Fe3Al Alloys

1967 ◽  
Vol 25 ◽  
pp. 312-313
Author(s):  
P. R. Swann ◽  
W. R. Duff ◽  
R. M. Fisher
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Annealing Temperature ◽  
Antiphase Domain ◽  
Effect Of Temperature ◽  
Domain Structures ◽  
Transmission Electron ◽  
Domain Boundaries ◽  
Higher Temperature ◽  
The One

Recently we have investigated the phase equilibria and antiphase domain structures of Fe-Al alloys containing from 18 to 50 at.% Al by transmission electron microscopy and Mössbauer techniques. This study has revealed that none of the published phase diagrams are correct, although the one proposed by Rimlinger agrees most closely with our results to be published separately. In this paper observations by transmission electron microscopy relating to the nucleation of disorder in Fe-24% Al will be described. Figure 1 shows the structure after heating this alloy to 776.6°C and quenching. The white areas are B2 micro-domains corresponding to regions of disorder which form at the annealing temperature and re-order during the quench. By examining specimens heated in a temperature gradient of 2°C/cm it is possible to determine the effect of temperature on the disordering reaction very precisely. It was found that disorder begins at existing antiphase domain boundaries but that at a slightly higher temperature (1°C) it also occurs by homogeneous nucleation within the domains. A small (∼ .01°C) further increase in temperature caused these micro-domains to completely fill the specimen.

The effect of temperature on high-resolution TEM image contrast

1995 ◽  
Vol 53 ◽  
pp. 640-641
Author(s):  
T. Geipel ◽  
W. Mader ◽  
P. Pirouz
Keyword(s):  
Form Factor ◽  
Inelastic Scattering ◽  
Accurate Method ◽  
Waller Factor ◽  
Effect Of Temperature ◽  
Specimen Thickness ◽  
Influence Of Temperature ◽  
Debye Waller Factor ◽  
Influence Of Temperature On ◽  
Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

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