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594 Newest Publications about the topic solution

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Branched Poly(ethylenimine) as Barrier Layer for Polyelectrolyte Diffusion in Multilayer Films

19-Nov-2015 | Peter Nestler; Malte Paßvogel; Heiko Ahrens; Olaf Soltwedel; Ralf Köhler; Christiane A. Helm, Macromolecules, 2015

Linearly assembled polyelectrolyte multilayers (PEMs) are prepared by sequential adsorption of polyanions and polycations from 0.1 mol/L NaCl. The internal structure of PEMs is investigated with neutron reflectivity. The films are made from poly(ethylenimine) (PEI), poly(diallyldimethylammonium) ...


The Role of Nanoparticle Rigidity on the Diffusion of Linear Polystyrene in a Polymer Nanocomposite

12-Nov-2015 | Brad Miller; Adam E. Imel; Wade Holley; Durairaj Baskaran; J. W. Mays; Mark D. Dadmun, Macromolecules, 2015

The impact of the inclusion of a nanoparticle in a polymer matrix on the dynamics of the polymer chains is an area of recent interest. In this article, we describe the role of nanoparticle rigidity or softness on the impact of the presence of that nanoparticle on the diffusive behavior of linear ...


Clustering of High Molecular Weight PCDTBT in Bulk-Heterojunction Casting Solutions

12-Nov-2015 | Andrew J. Clulow; Elliot P. Gilbert; Pascal Wolfer; Paul L. Burn; Ian R. Gentle, Macromolecules, 2015

The narrow optical gap conjugated polymer poly[N-9″-heptadecanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) has been used as the electron donor material in efficient solution-processed bulk-heterojunction (BHJ) photovoltaic and photodetector devices when ...


Multicomponent Polycoupling of Internal Diynes, Aryl Diiodides, and Boronic Acids to Functional Poly(tetraarylethene)s

09-Nov-2015 | Yajing Liu; Jesse Roose; Jacky W. Y. Lam; Ben Zhong Tang, Macromolecules, 2015

This paper describes the development of a new three-component polymerization route to functional poly(tetraarylethene)s (PTAEs). The polycoupling reactions of internal diynes, aryl diiodides, and arylboronic acids proceed smoothly in the presence of PdCl2 and NaF at 70 °C in dimethylformamide, ...


Monodisperse Conjugated Polymer Particles via Heck Coupling—A Kinetic Study to Unravel Particle Formation in Step-Growth Dispersion Polymerization

04-Nov-2015 | Sibel Ciftci; Alexander J. C. Kuehne, Macromolecules, 2015

Palladium-catalyzed cross-coupling dispersion polymerizations follow a step-growth mechanism and deliver highly monodisperse particles. This is surprising, considering the high polydispersity usually inherent to classical polycondensations at high conversion. Here we present a novel Heck-type ...


Importance of Microstructure Control for Designing New Electroactive Terpolymers Based on Vinylidene Fluoride and Trifluoroethylene

02-Nov-2015 | Thibaut Soulestin; Vincent Ladmiral; Thierry Lannuzel; Fabrice Domingues Dos Santos; Bruno Ameduri, Macromolecules, 2015

A new family of electroactive fluorinated terpolymers of vinylidene fluoride (VDF), trifluoroethylene (TrFE) and 3,3,3-trifluoropropene (TFP) is presented. Statistical poly(VDF-ter-TrFE-ter-TFP) terpolymers with a VDF/TrFE molar ratio of ca. 65/35 and a TFP composition ranging from 0 to 10 mol % ...


Deeper Insight into the MADIX Polymerization of Vinylidene Fluoride

02-Nov-2015 | Marc Guerre; Benjamin Campagne; Olinda Gimello; Karine Parra; Bruno Ameduri; Vincent Ladmiral, Macromolecules, 2015

Controlled radical polymerization protocols for vinylidene fluoride (VDF) are still very elusive. MADIX polymerization of VDF has very rarely been reported. The synthesis of PVDF using MADIX solution polymerization was thus investigated in detail. More efficient protocols for solution ...


Colorimetric Stimuli-Responsive Hydrogel Polymers for the Detection of Nerve Agent Surrogates

28-Oct-2015 | Christian Belger; Jonathan G. Weis; Eilaf Egap; Timothy M. Swager, Macromolecules, 2015

The threat of chemical warfare agents (CWAs) necessitates the development of functional materials that not only quickly detect the presence of CWAs but also actively protect against their toxicity. We have synthesized responsive units that exhibit colorimetric responses upon exposure to CWAs and ...


Topology and Shape Control for Assemblies of Block Copolymer Blends in Solution

27-Oct-2015 | Nicolas Moreno; Suzana P. Nunes; Klaus-Viktor Peinemann; Victor M. Calo, Macromolecules, 2015

We study binary blends of asymmetric diblock copolymers (AB/AC) in selective solvents with a mesoscale model. We investigate the morphological transitions induced by the concentration of the AC block copolymer and the difference in molecular weight between the AB and AC copolymers, when segments ...


Main-Chain Stiffness and Helical Conformation of a Poly(quinoxaline-2,3-diyl) in Solution

26-Oct-2015 | Yuuya Nagata; Hirokazu Hasegawa; Ken Terao; Michinori Suginome, Macromolecules, 2015

Light and small-angle X-ray scattering and viscosity measurements in tetrahydrofuran at 25 °C were made for nine helical poly[5,8-dimethyl-6,7-bis(propoxymethyl)quinoxaline-2,3-diyl] samples ranging in the weight-average molar mass Mw from 8 × 103 g mol–1 to 6 × 105 g mol–1 to determine the ...


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