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502 Newest Publications about the topic solution

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Crystallization of Poly(2-isopropyl-2-oxazoline) in Organic Solutions

03-Mar-2015 | Natalia Oleszko; Alicja Utrata-Wesołek; Wojciech Wałach; Marcin Libera; Anna Hercog; Urszula Szeluga; Marian Domańsk ..., Macromolecules, 2015

The crystallization of polymers from organic solvents is a common phenomenon. Poly(2-isopropyl-2-oxazoline) (PIPOx) is known to crystallize in aqueous or aqueous/organic solvent solutions. This process is associated with the dehydration of polymer chains above the polymer’s lower critical ...

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BCC Grain Formation Triggered by Miscibility Jump on Temperature Drop

02-Mar-2015 | Akifumi Matsushita; Shigeru Okamoto; Eiko Tamura; Tadashi Inoue, Macromolecules, 2015

Formation of a body-centered cubic (BCC) structure and grain growth process triggered by segregation-power jump on a temperature drop was studied by small-angle X-ray scattering (SAXS), rheology, and differential scanning calorimetry (DSC). Polystyrene-block-poly(ethylene-alt-propylene) (SEP) was ...

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Viscoelasticity of Poly(ethylene glycol) Solutions on Supported Lipid Bilayers via Quartz Crystal Microbalance with Dissipation

02-Mar-2015 | Ziliang Zhao; Xiangling Ji; Rumiana Dimova; Reinhard Lipowsky; Yonggang Liu, Macromolecules, 2015

Supported lipid bilayers of 1,2-dioleoyl-sn-glycero-3-phosphocholine were formed on a silicon oxide substrate, and the viscoelasticity of poly(ethylene glycol) (PEG) solutions above the bilayer was subsequently studied by quartz crystal microbalance with dissipation monitoring. No detectable ...

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The Origin of the Slow Mode in Dilute Aqueous Solutions of PEO

27-Feb-2015 | Jianqi Wang, Macromolecules, 2015

Besides the fast translational diffusion of individual chains, a slow relaxation mode is frequently observed in dilute poly(ethylene oxide) (PEO) aqueous solutions in dynamic laser light scattering (LLS) experiments, which was attributed to some hydrophobic impurities in PEO or interchain ...

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Ring-Opening Metathesis Polymerization of a Diolefinic [2]-Catenane–Copper(I) Complex: An Easy Route to Polycatenanes

27-Feb-2015 | José Augusto Berrocal; Louis M. Pitet; Marko M. L. Nieuwenhuizen; Luigi Mandolini; E. W. Meijer; Stefano Di Stefano, Macromolecules, 2015

A dilute (30 mM) dichloromethane solution of the copper(I) complex 1·Cu+ of a [2]-catenane composed of two identical 28-membered macrocyclic alkenes featuring a phenanthroline moiety in the backbone was subjected to ring-opening metathesis polymerization (ROMP) with second-generation Grubbs ...

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Spectroscopic Signature of Two Distinct H-Aggregate Species in Poly(3-hexylthiophene)

27-Feb-2015 | Fabian Panzer; Michael Sommer; Heinz Bässler; Mukundan Thelakkat; Anna Köhler, Macromolecules, 2015

In an endeavor to correlate the optoelectronic properties of π-conjugated polymers with their structural properties, we investigated the aggregation of P3HT in THF solution within a temperature range from 300 to 5 K. By detailed steady-state, site-selective, and time-resolved fluorescence ...

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Influence of the Solvent Quality on Ring Polymer Dimensions

23-Feb-2015 | Sebastian Gooßen; Ana R. Brás; Wim Pyckhout-Hintzen; Andreas Wischnewski; Dieter Richter; Michael Rubinstein; Jacque ..., Macromolecules, 2015

We present a systematic investigation of well-characterized, experimentally pure polystyrene (PS) rings with molar mass of 161 000 g/mol in dilute solutions. We measure the ring form factor at θ- and good-solvent conditions as well as in a polymeric solvent (linear PS of roughly comparable molar ...

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Reason for the High Solubility of Chemically Modified Poly(vinyl alcohol)s in Aqueous Solution

23-Feb-2015 | Kengo Arai; Misumi Okuzono; Toshiyuki Shikata, Macromolecules, 2015

Partially chemically modified poly(vinyl alcohol) synthesized via random introduction of a diol-type monomer (mPVA) shows much higher solubility in water than normal homo poly(vinyl alcohol) (PVA). To clarify the reason for the high solubility of mPVA, we investigated the temperature dependencies ...

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Dense, Highly Hydrated Polymer Brushes via Modified Atom-Transfer-Radical-Polymerization: Structure, Surface Interactions, and Frictional Dissipation

30-Dec-2014 | Odeya Tairy; Nir Kampf; Michael J. Driver; Steven P. Armes; Jacob Klein, Macromolecules, 2014

The conditions for atom transfer radical polymerization (ATRP) of poly[2-(methacryloyloxy)ethyl phosphorylcholine] (pMPC) chains are modified to enable much more efficient growth of these poly zwitterionic chains from macroinitiator-coated mica substrates using the “grafting from” technique. In ...

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Evidence for Catalyst Association in the Catalyst Transfer Polymerization of Thieno[3,2-b]thiophene

12-Dec-2014 | Pieter Willot; Guy Koeckelberghs, Macromolecules, 2014

The performance of catalyst transfer polymerization (CTP) reactions which depend on catalyst association was studied on 3,6-dioctylthiothieno[3,2-b]thiophene (TT)-monomers. This monomer was selected because a strong association of the catalyst is expected, since the aromaticity of thienothiophene ...

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