Results 161 to 170 of about 5,263 (208)
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LCST–UCST-Based Copolymerizations
2011It was shown in Chap. 3 that a polymerization system can start as a conventional precipitation system and end as an FRRPP system, especially if the phase diagram exhibits an hourglass-shaped phase envelope at relatively high polymer molecular weight. This sets up the arguments for other types of shifts from UCST- and LCST-based chain polymerizations ...
Gerard Caneba, Yadunandan Dar
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Molecular Description of the LCST Behavior of an Elastin-Like Polypeptide
Biomacromolecules, 2014Elastin-like polypeptides (ELPs) with the repeat sequence of VPGVG are widely used as a model system for investigation of lower critical solution temperature (LCST) transition behavior. In this paper, the effect of temperature on the structure, dynamics and association of (VPGVG)18 in aqueous solution is investigated using atomistic molecular dynamics ...
Nan K, Li +4 more
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Charge-Determined LCST/UCST Behavior in Ionic Polypeptoids
Biomacromolecules, 2018Stimuli-responsive polymers have received increasing interest for a variety of applications. Here, we report a series of unique charge-determined thermoresponsive polypeptoids synthesized by a combination of ring-opening polymerization and click chemistry.
Chao Xing +4 more
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Thermodynamic Description of Hofmeister Effects on the LCST of Thermosensitive Polymers
The Journal of Physical Chemistry B, 2014Cosolvent effects on protein or polymer collapse transitions are typically discussed in terms of a two-state free energy change that is strictly linear in cosolute concentration. Here we investigate in detail the nonlinear thermodynamic changes of the collapse transition occurring at the lower critical solution temperature (LCST) of the role-model ...
Jan, Heyda, Joachim, Dzubiella
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Synthesis and Properties of Ionically Modified Polymers with LCST Behavior
Macromolecules, 1998Ionically modified LCST polymers were synthesized by free radical copolymerization of N-isopropylacrylamide (NIPAM) with various cationic, anionic, and amphoteric comonomers, resulting in products with comparable molecular masses and charge concentrations.
Hahn, M., Görnitz, E., Dautzenberg, H.
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LCST and UCST behavior in polymer solutions and blends
Polymer, 2012Abstract We introduce a model for polymer solutions and blends that display both an upper and a lower critical solution temperature (UCST, LCST). Using our simple analytic lattice theory along with a fixed parameter set independent of both composition and temperature, we study solutions and blends exhibiting complicated miscibility patterns ...
E.A. Clark, J.E.G. Lipson
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Polymers for Advanced Technologies, 2015
An ionic thermo‐responsive copolymer with multiple lower critical solution temperatures (multi‐LCSTs) has been developed, and the multi‐LCSTs were easily changeable according to the various counter anion types. The multi‐LCST values were achieved by introducing an ionic segment with an imidazolium moiety within the p‐NIPAAm polymer chain to produce ...
Jae‐Won Seo, Ueon Sang Shin
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An ionic thermo‐responsive copolymer with multiple lower critical solution temperatures (multi‐LCSTs) has been developed, and the multi‐LCSTs were easily changeable according to the various counter anion types. The multi‐LCST values were achieved by introducing an ionic segment with an imidazolium moiety within the p‐NIPAAm polymer chain to produce ...
Jae‐Won Seo, Ueon Sang Shin
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A Novel Nanocomposite Hydrogel with Precisely Tunable UCST and LCST
Macromolecular Rapid Communications, 2015Novel thermosensitive nanocomposite (NC) hydrogels consisting of organic/inorganic networks are prepared via in situ free radical polymerization of 2‐(2‐methoxyethoxy) ethyl methacrylate (MEO2MA) and oligo(ethylene glycol) methacrylate (OEGMA) in the presence of inorganic cross‐linker clay in aqueous solution.
Mengge, Xia +6 more
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The Origin of the LCST on the Liquid–Liquid Equilibrium of Thiophene with Ionic Liquids
The Journal of Physical Chemistry B, 2012Mixtures of thiophene with two ionic liquids, namely, [C(4)C(1)im][SCN] and [C(4)C(1)im][NTf(2)], were chosen as prototypes of systems presenting lower critical solution temperature (LCST) and upper critical solution temperature (UCST) behavior, respectively. This distinct behavior is due to different interactions between the constituting species which
Batista, Marta L. S. +5 more
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Macromolecular Research, 2015
A series of stimuli-responsive copolymers (p-NIBIm) of N-isopropylacrylamide (NIPAAm) and 1-butyl-3-vinyl imidazolium bromide (BVIm) with various BVIm monomer concentrations such as 5, 10, 15, and 20 mol% were synthesized by radical copolymerization.
Jae-Won Seo, Ueon Sang Shin
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A series of stimuli-responsive copolymers (p-NIBIm) of N-isopropylacrylamide (NIPAAm) and 1-butyl-3-vinyl imidazolium bromide (BVIm) with various BVIm monomer concentrations such as 5, 10, 15, and 20 mol% were synthesized by radical copolymerization.
Jae-Won Seo, Ueon Sang Shin
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