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574 Newest Publications about the topic solution

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Polythiophenes with Thiophene Side Chain Extensions: Convergent Syntheses and Investigation of Mesoscopic Order

25-Sep-2015 | M. Scheuble; Y. M. Gross; D. Trefz; M. Brinkmann; J. T. López Navarrete; M. C. Ruiz Delgado; S. Ludwigs, Macromolecules, 2015

A versatile convergent synthesis route to side chain π-extended, highly regioregular polythiophenes is presented. The implementation of β-conjugated alkyl thiophene branches in linear polythiophenes is used as synthetical tool for energy level engineering, with branched alkyl chains being ...


Thermodynamics of Aqueous Methylcellulose Solutions

24-Sep-2015 | John W. McAllister; Peter W. Schmidt; Kevin D. Dorfman; Timothy P. Lodge; Frank S. Bates, Macromolecules, 2015

The weight-average molecular weight Mw, z-average radius of gyration Rg, and second virial coefficient A2 have been determined between 15 and 52 °C for dilute aqueous solutions of methylcellulose (MC) with three different molecular weights and constant degree of substitution (DS) of 1.8 using ...


Simple and Accurate Determination of Reactivity Ratios Using a Nonterminal Model of Chain Copolymerization

24-Sep-2015 | Bryan S. Beckingham; Gabriel E. Sanoja; Nathaniel A. Lynd, Macromolecules, 2015

We propose a new method for the determination of reactivity ratios based on a nonterminal model of copolymerization kinetics. Within the context of this model, we derive simple, reactivity-ratio-dependent expressions whose solution relies solely on monomer consumption information spanning the ...


Osmotic Pressure of Polyelectrolyte Solutions with Salt: Grand Canonical Monte Carlo Simulation Studies

24-Sep-2015 | Rakwoo Chang; Yongbin Kim; Arun Yethiraj, Macromolecules, 2015

The thermodynamic properties of polyelectrolyte solutions are of long-standing interest. Theoretical complexity arises not only from the long-ranged electrostatic interaction but also from the multicomponent nature of the solution, In this work, we report grand canonical Monte Carlo simulations ...


Amplified Responsiveness of Multilayered Polymer Grafts: Synergy between Brushes and Hydrogels

24-Sep-2015 | Shivaprakash N. Ramakrishna; Marco Cirelli; E. Stefan Kooij; Michel Klein Gunnewiek; Edmondo M. Benetti, Macromolecules, 2015

The responsive properties of surface-grafted polymer films in aqueous media can be amplified by covalently layering thermosensitive brushes and hydrogels. This was demonstrated by synthesizing layers of linear poly(N-isopropylacrylamide) (PNIPAM) brushes, alternating with cross-linked, ...


Effects of Electric Charge on the Interfacial Tension between Coexisting Aqueous Mixtures of Polyelectrolyte and Neutral Polymer

22-Sep-2015 | Mark Vis; Vincent F. D. Peters; Edgar M. Blokhuis; Henk N. W. Lekkerkerker; Ben H. Erné; R. Hans Tromp, Macromolecules, 2015

Upon demixing, an aqueous solution of a polyelectrolyte and an incompatible neutral polymer yields two phases separated by an interface with an ultralow tension. Here, both in theory and experiment, we study this interfacial tension in detail: how it scales with the concentrations of the polymers ...


Fluorescent Labeling Can Alter Polymer Solution Dynamics

17-Sep-2015 | Ryan McDonough; Rafael Cueto; George D. J. Phillies; Paul S. Russo; Derek Dorman; Kiril A. Streletzky, Macromolecules, 2015

There is a widespread assumption that modest chemical modification of a large polymer molecule, by adding a fluorescent label or the like, has no significant effect on polymer solution dynamics. We here report that light tagging of hydroxypropylcellulose (HPC) with fluorescein dye has a ...


Intermolecular Interactions and Self-Assembly in Aqueous Solution of a Mixture of Anionic–Neutral and Cationic–Neutral Block Copolymers

15-Sep-2015 | Rintaro Takahashi; Takahiro Sato; Ken Terao; Shin-ichi Yusa, Macromolecules, 2015

We have investigated the self-assembly in dilute aqueous solutions of a mixture of an anionic–neutral block copolymer (AP) and a cationic–neutral block copolymer (MP) by changing the added sodium chloride (NaCl) concentration CS or electrostatic interactions among oppositely charged blocks, by ...


Salt Dependence of the Chain Stiffness and Excluded-Volume Strength for the Polymethacrylate-Type Sulfopropylbetaine in Aqueous NaCl Solutions

14-Sep-2015 | Moriya Kikuchi; Yuki Terayama; Tatsuya Ishikawa; Taiki Hoshino; Motoyasu Kobayashi; Noboru Ohta; Hiroshi Jinnai; Ats ..., Macromolecules, 2015

A series of zwitterionic polyelectrolytes poly[3-(N-2-methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate] (PMAPS) with a wide range of weight-average molecular weight (Mw) between 5.5 × 103 and 1.6 × 106 g mol–1 with narrow molecular weight distribution (Mw/Mn = 1.07–1.19) were thoroughly ...


Structure–Property Relationships of Hyperbranched Polymer/Kaolinite Nanocomposites

11-Sep-2015 | Shereen Shabaan Omara; Mona H. Abdel Rehim; Ahmed Ghoneim; Sherif Madkour; Andreas F. Thünemann; Gamal Turky; Andrea ..., Macromolecules, 2015

Two methods were employed to prepare hyperbranched polyamine ester (HPAE)/kaolinite (Ka) nanocomposites resulting in different morphologies. In the case of the in situ polymerization, diethanolamine is inserted as monomer between the Ka layers and polymerized with methyl acrylate to prepare ...


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