Computer simulation of polymers in thin layers. II. Structure of polymer melt layers consisting of end‐to‐wall grafted chains

1991 ◽  
Vol 95 (6) ◽  
pp. 4691-4697 ◽  
Author(s):  
T. Pakula ◽  
E. B. Zhulina
Keyword(s):  
Computer Simulation ◽  
Polymer Melt ◽  
Thin Layers

Computer simulation of steady polymer melt spinning

1981 ◽  
Vol 21 (13) ◽  
pp. 844-853 ◽  
Author(s):  
Del Kenneth Gagon ◽  
Morton M. Denn
Keyword(s):  
Computer Simulation ◽  
Melt Spinning ◽  
Polymer Melt

Equilibrium Dynamics of an Associating Polymer Melt in Narrow Slits by Computer Simulation

2007 ◽  
Vol 111 (16) ◽  
pp. 4141-4149 ◽  
Author(s):  
Marco Malvaldi ◽  
Samantha Bruzzone ◽  
Guido Raos ◽  
Giuseppe Allegra
Keyword(s):  
Computer Simulation ◽  
Polymer Melt ◽  
Equilibrium Dynamics ◽  
Associating Polymer

The preparation of polymer melt samples for computer simulation studies

1994 ◽  
Vol 100 (8) ◽  
pp. 6011-6018 ◽  
Author(s):  
David Brown ◽  
Julian H. R. Clarke ◽  
Motoi Okuda ◽  
Takao Yamazaki
Keyword(s):  
Computer Simulation ◽  
Polymer Melt ◽  
Simulation Studies ◽  
Computer Simulation Studies

Computer simulation study on the self-assembly of unimodal and bimodal polymer-grafted nanoparticles in a polymer melt

2017 ◽  
Vol 19 (25) ◽  
pp. 16524-16532 ◽  
Author(s):  
Rui Shi ◽  
Hu-Jun Qian ◽  
Zhong-Yuan Lu
Keyword(s):  
Molecular Dynamics ◽  
Computer Simulation ◽  
Polymer Matrix ◽  
Self Assembly ◽  
Polymer Melt ◽  
The Self ◽  
Computer Simulation Study ◽  
Assembly Behavior ◽  
Grafted Nanoparticles ◽  
Dynamics Simulations

By performing comprehensive molecular dynamics simulations, the self-assembly behavior of polymer-grafted nanoparticles in a polymer matrix is investigated in this study. Short grafted chains on bimodal grafted NP surfaces favor the dispersion of NPs in the polymer matrix.

Radiation Damaging of 3C-SiC Lattice: Computer Simulation of Brownian Motion of Non-Point Defects

2014 ◽  
Vol 353 ◽  
pp. 148-152 ◽  
Author(s):  
Galina I. Zmievskaya ◽  
A.L. Bondareva ◽  
Vl.V. Savchenko
Keyword(s):  
Phase Transition ◽  
Computer Simulation ◽  
Brownian Motion ◽  
Kinetic Equations ◽  
Computer Experiments ◽  
High Energy ◽  
Thin Layers ◽  
Elastic Stresses ◽  
Initial Stage ◽  
Elastic Forces

The formation of porosity in thin layers of coating under its processing using the flux of high energyXe++is happen under the physical processes of nucleation of gaseous defects. The process is described by kinetic equations of Kolmogorov-Feller and Einstein-Smolukhovskii. The initial stage of the phase transition is considered as the superposition of two random processes: clustering of defects and their brownian motion. In the paper, we showthat a damaging phenomenon in layers can be predicted by means of computer experiments. The kinetic distribution function (DF) of defects depends on sizes and depth their penetration into materials under irradiation. Computer simulation of DF allows analysing the porosity and elastic stresses in bilayer caused byXe++blistering. The structures of defects are accumulated inSiClayer due to phase transition as well as a result the action perturbation of elastic forces in thin layers.

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Polymer Morphology Revealed by Staining Techniques

1981 ◽  
Vol 39 ◽  
pp. 340-341
Author(s):  
A. C. Reimschuessel ◽  
V. Kramer
Keyword(s):  
Polymer Melt ◽  
Nylon 6 ◽  
Morphological Features ◽  
Negative Staining ◽  
Polymer Morphology ◽  
Crystallizable Polymer ◽  
Staining Techniques ◽  
Long Chain

Staining techniques can be used for either the identification of different polymers or for the differentiation of specific morphological domains within a given polymer. To reveal morphological features in nylon 6, we choose a technique based upon diffusion of the staining agent into accessible regions of the polymer.When a crystallizable polymer - such as nylon 6 - is cooled from the melt, lamellae form by chainfolding of the crystallizing long chain macromolecules. The regions between adjacent lamellae represent the less ordered amorphous domains into which stain can diffuse. In this process the lamellae will be “outlined” by the dense stain, giving rise to contrast comparable to that obtained by “negative” staining techniques.If the cooling of the polymer melt proceeds relatively slowly - as in molding operations - the lamellae are usually arranged in a radial manner. This morphology is referred to as spherulitic.

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