A unified theory of the dynamics of linear chain macromolecules: From unentangled to entangled polymer fluids

1991 ◽  
Vol 95 (3) ◽  
pp. 2080-2096 ◽  
Author(s):  
Igal Szleifer ◽  
Roger F. Loring
Keyword(s):  
Linear Chain ◽  
Unified Theory ◽  
Polymer Fluids ◽  
Entangled Polymer

Secondary flow of entangled polymer fluids in plane Couette shear

1996 ◽  
Vol 40 (4) ◽  
pp. 549-571 ◽  
Author(s):  
Vijay R. Mhetar ◽  
L. A. Archer
Keyword(s):  
Secondary Flow ◽  
Polymer Fluids ◽  
Entangled Polymer

Mode-coupling theory of entangled polymer fluids

1995 ◽  
Vol 24 (6-8) ◽  
pp. 947-977 ◽  
Author(s):  
Kenneth S. Schweizer ◽  
Grzegorz Szamel
Keyword(s):  
Mode Coupling ◽  
Coupling Theory ◽  
Mode Coupling Theory ◽  
Polymer Fluids ◽  
Entangled Polymer

Banding in Entangled Polymer Fluids under Oscillatory Shearing

2006 ◽  
Vol 96 (19) ◽  
Author(s):  
Prashant Tapadia ◽  
Sham Ravindranath ◽  
Shi-Qing Wang
Keyword(s):  
Polymer Fluids ◽  
Oscillatory Shearing ◽  
Entangled Polymer

Fractionation of polymethylene chains: An electron crystallographic investigation

1986 ◽  
Vol 44 ◽  
pp. 794-795
Author(s):  
Douglas L. Dorset
Keyword(s):  
Cross Section ◽  
Binary Systems ◽  
Linear Chain ◽  
Pure Component ◽  
Organic Substrates ◽  
Crystallographic Investigation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Sizes ◽  
The Stability

A variety of linear chain materials exist as polydisperse systems which are difficultly purified. The stability of continuous binary solid solutions assume that the Gibbs free energy of the solution is lower than that of either crystal component, a condition which includes such factors as relative molecular sizes and shapes and perhaps the symmetry of the pure component crystal structures.Although extensive studies of n-alkane miscibility have been carried out via powder X-ray diffraction of bulk samples we have begun to examine binary systems as single crystals, taking advantage of the well-known enhanced scattering cross section of matter for electrons and also the favorable projection of a paraffin crystal structure posited by epitaxial crystallization of such samples on organic substrates such as benzoic acid.

Field ion microscope investigations of atomic processes at surfaces

1989 ◽  
Vol 47 ◽  
pp. 228-229
Author(s):  
G. L. Kellogg ◽  
P. R. Schwoebel
Keyword(s):  
Single Crystal ◽  
Crystal Surface ◽  
Linear Chain ◽  
Atom Probe ◽  
Nucleation And Growth ◽  
Single Atom ◽  
Initial Structure ◽  
Atomic Processes ◽  
Single Crystal Surfaces ◽  
Field Ion Microscope

Although no longer unique in its ability to resolve individual single atoms on surfaces, the field ion microscope remains a powerful tool for the quantitative characterization of atomic processes on single-crystal surfaces. Investigations of single-atom surface diffusion, adatom-adatom interactions, surface reconstructions, cluster nucleation and growth, and a variety of surface chemical reactions have provided new insights to the atomic nature of surfaces. Moreover, the ability to determine the chemical identity of selected atoms seen in the field ion microscope image by atom-probe mass spectroscopy has increased or even changed our understanding of solid-state-reaction processes such as ordering, clustering, precipitation and segregation in alloys. This presentation focuses on the operational principles of the field-ion microscope and atom-probe mass spectrometer and some very recent applications of the field ion microscope to the nucleation and growth of metal clusters on metal surfaces.The structure assumed by clusters of atoms on a single-crystal surface yields fundamental information on the adatom-adatom interactions important in crystal growth. It was discovered in previous investigations with the field ion microscope that, contrary to intuition, the initial structure of clusters of Pt, Pd, Ir and Ni atoms on W(110) is a linear chain oriented in the <111> direction of the substrate.

A Unified Theory of Voting

1999 ◽  
Author(s):  
Samuel Merrill, III ◽  
Bernard Grofman
Keyword(s):  
Unified Theory

A Unified Theory of Party Competition

2005 ◽  
Author(s):  
James F. Adams ◽  
Samuel Merrill III ◽  
Bernard Grofman
Keyword(s):  
Party Competition ◽  
Unified Theory
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