Results 21 to 30 of about 7,432 (275)

Composite Anion Exchange Membranes Based on Quaternary Ammonium-Functionalized Polystyrene and Cerium(IV) Phosphate with Improved Monovalent-Ion Selectivity and Antifouling Properties

open access: yesMembranes, 2023
The possibility of targeted change of the properties of ion exchange membranes by incorporation of various nanoparticles into the membranes is attracting the attention of many research groups.
Andrey Manin   +3 more
doaj   +1 more source

Photoinduced Synthesis of Block Copolymers by Combination of Atom Transfer Radical Polymerization and Photoinduced Radical Oxidation/Addition/Deactivation

open access: yesJournal of the Turkish Chemical Society, Section A: Chemistry, 2018
A new polymerization mechanistic transformation strategy, combining two different controlled polymerization techniques of different modes, atom transfer radical polymerization (ATRP) and photoinduced radical oxidation/addition/deactivation (PROAD), is ...
Mustafa Çiftci
doaj   +1 more source

Redox active dendronized polystyrenes equipped with peripheral triarylamines

open access: yesBeilstein Journal of Organic Chemistry, 2014
Dendronized polystyrene having peripheral bromo groups was prepared from the dendronization of unfunctionalized polystyrene with dendritic diarylcarbenium ions bearing peripheral bromo groups using the “cation pool” method.
Toshiki Nokami   +6 more
doaj   +1 more source

Revisiting molecular weight distribution of polystyrenes using adsorption highperformance thin-layer chromatography [PDF]

open access: yes, 2013
A repeatable separation of polystyrenes according to MW, from 1920 to 520000 u.m.a, has been obtained under adsorption conditions using a method that comprises the use of Lichrospher HPTLC plates, and a controlled, isocratic elution with a 78:22 (v/v ...
Cebolla, Vicente L.   +5 more
core   +1 more source

Self-assembly of triblock copolymers in aqueous solution [PDF]

open access: yes, 2008
Indexación: ScieloThe aggregation of PE4VP-b-PS-b-PE4VP block copolymers was studied in aqueous solution. Triblock copolymers P4VP-b-PS-b-P4VP were synthesized by sequential anionic polymerization of poly(styrene) and poly(4-vinylpirydine) using sodium ...
Fuentes, Irma   +4 more
core   +3 more sources

Cationic polymerization of styrene using iron-containing ionic liquid catalysts in an aqueous dispersed medium [PDF]

open access: yesPolímeros
This work aims to study the cationic miniemulsion polymerization of styrene catalyzed by iron-containing imidazolium-based ionic liquids. The polystyrenes had very high number-average molar mass around 1300 kg mol-1 at 85 °C, molar-mass dispersity close ...
Gabriel Victor Simões Dutra   +5 more
doaj   +2 more sources

Speckle tweezers for manipulation of high and low refractive index micro-particles and nano-particle loaded vesicles

open access: yesNanophotonics, 2021
Several fundamental research and applications in biomedicine and microfluidics often require controlled manipulation of suspended micro- and nanoscale particles.
Jamali Ramin   +4 more
doaj   +1 more source

Polystyrene Backbone Polymers Consisting of Alkyl-Substituted Triazine Side Groups for Phosphorescent OLEDs

open access: yesAdvances in Materials Science and Engineering, 2012
This paper describes the synthesis of new electron-transporting styrene monomers and their corresponding polystyrenes all with a 2,4,6-triphenyl-1,3,5-triazine basic structure in the side group.
Beatrice Ch. D. Salert   +5 more
doaj   +1 more source

Adsorption of plant phenols by polystyrene resins

open access: yesActa Societatis Botanicorum Poloniae, 2014
Adsorption of nine plant phenols by nine polystyrene ion-exchange resins was investigated in an experimental model system. The phenols were adsorbed by Amberlite CG-120 more efficiently than any other acidically charged resins tested in this study.
Akiyoshi Fukushima   +2 more
doaj   +1 more source

A quantitative relationship between Tgs and chain segment structures of polystyrenes

open access: yesPolímeros
The glass transition temperature (Tg) is a fundamental characteristic of an amorphous polymer. A quantitative structure-property relationship (QSPR) based on error back-propagation artificial neural network (ANN) was constructed to predict Tgs of 107 ...
Xinliang Yu, Xianwei Huang
doaj   +1 more source

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