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11 Newest Publications about the topic polymer separation

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Flow-induced polymer separation through a nanopore: effects of solvent quality

15-Jan-2018 | Mingming Ding; Xiaozheng Duan; Tongfei Shi, Soft Matter, 2018

Using a hybrid simulation method that combines a lattice-Boltzmann approach for the flow and a molecular dynamics model for the polymer, we investigated the effect of solvent quality on the flow-induced polymer translocation through a nanopore. We demonstrate the nontrivial dependence of the ...

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Facile Production of Biodegradable Bipolymer Patchy and Patchy Janus Particles with Controlled Morphology by Microfluidic Routes

16-Aug-2017 | Ekanem E. Ekanem; Zilin Zhang; Goran T. Vladisavljević, Langmuir, 2017

Patchy and patchy Janus particles composed of poly(dl-lactic acid) (PLA) and polycaprolactone (PCL) regions were produced with a controlled size, patchiness, composition, and shape anisotropy by microfluidic emulsification and solvent evaporation. Isotropic particles composed of PCL patches ...

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Ternary Solid–Liquid Equilibria of Semicrystalline, Branched Polymer Solvent Mixtures—A Theoretical Study by Means of Lattice Cluster Theory

13-Sep-2016 | Michael Fischlschweiger; Sabine Enders, Journal of Chemical & Engineering Data, 2016

Analytical polymer separation techniques, like CRYSTAF (crystallization analysis fractionation) and TREF (temperature rising elution fractionation), play a crucial role in gaining insight into the interrelation between molecular architecture and properties. Often polymer samples are ...

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Radius of Gyration, Mean Span, and Geometric Shrinking Factors of Bridged Polycyclic Ring Polymers

16-Jun-2016 | Lijuan Zhu, Xiaoyan Wang, Jianfeng Li, Yanwei Wang, Macromolecular Theory and Simulations, 2016

This study concerns the equilibrium geometric properties of a family of cyclic chains, referred to as the “bridged polycyclic rings,” which have f flexible subchains bridging two common branch points. By increasing the number of bridges, f, this family encompasses the usual linear chain (f = 1), ...

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Linear polymer separation using carbon‐nanotube‐modified centrifugal filter units

02-Sep-2015 | Tomasz Krawczyk, Karolina Marian, Mirosława Pawlyta, Journal of Separation Science, 2015

The separation of linear polymers such as polysaccharides and polyethylene glycol was performed with modified commercial centrifugal filter units. The deposition of a 0.16–0.35 μm layer of modified carbon nanotubes prevented permeation of linear polymers of molecular weight higher than 20 000 Da ...

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Equilibrium Distribution of Semiflexible Polymer Chains between a Macroscopic Dilute Solution Phase and Small Voids of Cylindrical Shape

01-Jul-2015 | Xiaoyan Wang, Meng Tang, Yanwei Wang, Macromolecular Theory and Simulations, 2015

The equilibrium partition coefficients () are calculated for self‐avoiding, semiflexible chains with the same finite contour length () and a variety of persistence length () values, partitioning between a macroscopic dilute solution phase and confined solution phases in cylindrical voids in the ...

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A Theory for Solubility of Semicrystalline and Branched Polymers in One Solvent

21-Oct-2014 | Michael Fischlschweiger; Sabine Enders, Macromolecules, 2014

Chain architecture and degree of crystallinity of polymers strongly influence the solid–liquid equilibrium of binary polymer solvent systems. Especially, for explaining the principle of common polymer separation techniques a fair prediction of solid–liquid equilibria of polymer solvent systems is ...

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The unusual fluorescence intensity enhancement of poly(p-phenyleneethynylene) polymer separated from the silver nanocube surface by H-bonded LbL shells

04-Jul-2012 | Milana Lisunova; Mahmoud Mahmoud; Neal Holland; Zachary A. Combs; Mostafa A. El-Sayed; Vladimir V. Tsukruk, Journal of Materials Chemistry, 2012

The fluorescence intensity of poly(p-phenyleneethynylene) (PPE) polymer separated from the surface of plasmonic silver nanocubes (47 nm AgNCs) is measured by varying the number of layers of polyvinyl pyrrolidone (PVPON) and polymethyl acrylic acid (PMAA), n. The shell thickness is sensitive to ...

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Separation of polystyrenes by means of open tubular capillary chromatography

12-Jun-2012 | Alexander A. Korolev, Elena N. Viktorova, Vladimir A. Orekhov, Anastasiya Yu. Kanatyeva, Alexander A. Kurganov, Journal of Separation Science, 2012

Simulating polymer separation in flow‐through channels of monolithic columns, separation of a mixture of polystyrene standards was investigated using open tubular capillary column of 2 μm inner diameter. High column efficiency was observed for polymers of molar mass ranged from few tens to few ...

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Simultaneous analysis of cardiac glycosides in blood and urine by thermoresponsive LC-MS-MS

14-Nov-2010 | Sanae Kanno, Kanako Watanabe, Itaru Yamagishi, Seishiro Hirano, Kayoko Minakata, Kunio Gonmori, Osamu Suzuki, Analytical and Bioanalytical Chemistry, 2010

A new thermoresponsive polymer separation column was applied to simultaneous analysis of four cardiac glycosides (CGs) being widely used for the treatment of arrhythmias and heart failure in human blood and urine. This column is composed of an N-isopropylacrylamide polymer, the surface of which ...

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