scholarly journals The long and the short of polymer grafting

2019 ◽  
Vol 10 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Lukas Michalek ◽  
Kai Mundsinger ◽  
Christopher Barner-Kowollik ◽  
Leonie Barner
Keyword(s):  
Size Distribution ◽  
Interface Design ◽  
Polymer Chains ◽  
Polymer Grafting ◽  
Functional Polymer ◽  
Polymer Interface ◽  
Distortion Effect

Polymer chains are grafted depending on their size onto solid interfaces, leading to a distortion of the surface grafted size distribution. We herein predict and quanitify this distortion effect, which has critical consequences for functional polymer interface design.

Silicon Doping by Polymer Grafting: Size Distribution Matters

2021 ◽  
Author(s):  
Michele Perego ◽  
Stefano Kuschlan ◽  
Gabriele Seguini ◽  
Riccardo Chiarcos ◽  
Valentina Gianotti ◽  
...  
Keyword(s):  
Size Distribution ◽  
Polymer Grafting ◽  
Silicon Doping

Cluster-Size Distribution of Cross-Linked Polymer Chains across the Gelation Threshold

1998 ◽  
Vol 31 (16) ◽  
pp. 5316-5322 ◽  
Author(s):  
Tomohisa Norisuye ◽  
Masanao Takeda ◽  
Mitsuhiro Shibayama
Keyword(s):  
Size Distribution ◽  
Cluster Size ◽  
Cluster Size Distribution ◽  
Polymer Chains

scholarly journals Characterization of Liposomes Which Have Functional Polymer Chains on Their Surfaces.

MEMBRANE ◽  
1999 ◽  
Vol 24 (3) ◽  
pp. 153-158 ◽  
Author(s):  
Koji Tagawa ◽  
Hiromi Kitano
Keyword(s):  
Polymer Chains ◽  
Functional Polymer

Colloidal assembly by ice templating

2016 ◽  
Vol 186 ◽  
pp. 61-76 ◽  
Author(s):  
Guruswamy Kumaraswamy ◽  
Bipul Biswas ◽  
Chandan Kumar Choudhury
Keyword(s):  
Size Distribution ◽  
Particle Concentration ◽  
Colloidal Particles ◽  
Cluster Formation ◽  
Polymer Chains ◽  
Concentration Gradients ◽  
Aqueous Dispersions ◽  
Colloidal Assembly ◽  
Colloidal Clusters ◽  
Ice Templating

We investigate ice templating of aqueous dispersions of polymer coated colloids and crosslinkers, at particle concentrations far below that required to form percolated monoliths. Freezing the aqueous dispersions forces the particles into close proximity to form clusters, that are held together as the polymer chains coating the particles are crosslinked. We observe that, with an increase in the particle concentration from about 106 to 108 particles per ml, there is a transition from isolated single particles to increasingly larger clusters. In this concentration range, most of the colloidal clusters formed are linear or sheet like particle aggregates. Remarkably, the cluster size distribution for clusters smaller than about 30 particles, as well as the size distribution of linear clusters, is only weakly dependent on the dispersion concentration in the range that we investigate. We demonstrate that the main features of cluster formation are captured by kinetic simulations that do not consider hydrodynamics or instabilities at the growing ice front due to particle concentration gradients. Thus, clustering of colloidal particles by ice templating dilute dispersions appears to be governed only by particle exclusion by the growing ice crystals that leads to their accumulation at ice crystal boundaries.

scholarly journals Molecular influence in the glass/polymer interface design: The role of segmental dynamics

Polymer ◽  
2018 ◽  
Vol 146 ◽  
pp. 222-229 ◽  
Author(s):  
Alex J. Hsieh ◽  
David Veysset ◽  
Daniel F. Miranda ◽  
Steven E. Kooi ◽  
James Runt ◽  
...  
Keyword(s):  
Interface Design ◽  
Segmental Dynamics ◽  
Polymer Interface

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj> 0 for eachj> 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

Macrostructure and microphysics of Saturn's E-ring

1984 ◽  
Vol 75 ◽  
pp. 607-613 ◽  
Author(s):  
Kevin D. Pang ◽  
Charles C. Voge ◽  
Jack W. Rhoads
Keyword(s):  
Size Distribution ◽  
Spherical Shape ◽  
Mie Scattering ◽  
Narrow Size Distribution ◽  
Electrostatic Levitation ◽  
Volcanic Origin ◽  
Micron Diameter

Abstract.All observed optical and infrared properties of Saturn's E-ring can be explained in terms of Mie scattering by a narrow size distribution of ice spheres of 2 - 2.5 micron diameter. The spherical shape of the ring particles and their narrow size distribution imply a molten (possibly volcanic) origin on Enceladus. The E-ring consists of many layers, possibly stratified by electrostatic levitation.

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

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