Unusual salt effect on the lower critical solution temperature of hyperbranched thermoresponsive polymers

Liu, Xunyong; Cheng, Fa; Liu, Huaji; Chen, Yu

doi:10.1039/b811012n

Cited by 46 publications

(48 citation statements)

References 22 publications

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“…They undergo a reversible phase transition at lower critical solution temperature (LCST). It has been known that polymer architecture affects the thermal phase transition behavior of thermoresponsive polymer solutions . Although many efforts have been made to impart the thermoresponsive character into dendritic polymers, until recently, only a few studies related to thermoresponsive linear–dendritic block copolymers have been reported.…”

Section: Introductionmentioning

confidence: 99%

Well‐defined thermoresponsive dendritic polyamide/poly(N‐vinylcaprolactam) block copolymers

Yun-mei

Yan

Shao

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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The first‐ and second‐generation well‐defined thermoresponsive amphiphilic linear–dendritic diblock copolymers based on hydrophilic linear poly(N‐vinylcaprolactam) and hydrophobic dendritic aromatic polyamide have been synthesized via reversible addition fragmentation chain transfer polymerization of N‐vinylcaprolactam by employing dendritic chain‐transfer agents possessing a single dithiocarbamate moiety at the focal point. These linear–dendritic copolymers exhibit reversible temperature‐dependent phase transition behaviors in aqueous solution as characterized by turbidity measurements using UV–vis spectroscopy. Their lower critical solution temperatures depend on the generation of the dendritic aromatic polyamides and the concentrations of the copolymer solutions. These amphiphilic copolymers are able to form nanospherical micelles in the aqueous solution as revealed by fluorescent spectroscopy, dynamic light scattering, and transmission electron microscope (TEM). The core–shell structure of micelles has been proved by 1H NMR analyses of the micelles in D2O. The micelles loaded with indomethacin as a model drug showed high‐drug loading capacity and thermoresponsive drug release behavior. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 3240–3250

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Section: Introductionmentioning

confidence: 99%

Well‐defined thermoresponsive dendritic polyamide/poly(N‐vinylcaprolactam) block copolymers

Yun-mei

Yan

Shao

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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“…91 Liu et al systematically studied the salt effect on the LCST behavior of the thermo-sensitive hyperbranched polymers in aqueous solution. [92][93] In their report, the specific ranking of both anions and cations in reducing the LCST was provided.…”

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confidence: 98%

Stimuli-Responsive Polymers and their Potential Applications in Oil-Gas Industry

2015

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Polymers with properties well-controlled by minor environmental variations have been widely utilized in nanoscience, nanotechnology, and nanomedicine. Herein, the classification of stimuli-responsive polymers will be discussed and related to some possible applications in the oil-gas industry. Current studies of stimuli-responsive polymers in the oil-gas production are mainly focused on enhanced oil recovery (EOR) processes. Still, their potential applications in various aspects of the oil-gas industry from upstream, midstream, and downstream processes are found to be promising.

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“…After diluting with CH 2 Cl 2 (300 mL), the organic layer was washed once with 100 mL of HCl aq (1 M), once with 100 mL of saturated NaHCO 3 aq and twice with 100 mL of saturated brine. The organic layer was dried over MgSO 4 and concentrated under reduced pressure to afford the desired compound as white solid (3.8 g, yield 50%). 1 …”

Section: Synthesis Of N-(1-hydroxy-3-methylbutan-2-yl)isobutyramidementioning

confidence: 99%

Thermo-, and pH dual-responsive poly(N-vinylimidazole): Preparation, characterization and its switchable catalytic activity

Wang

Liu

Jiang

et al. 2014

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Unusual salt effect on the lower critical solution temperature of hyperbranched thermoresponsive polymers

Cited by 46 publications

References 22 publications

Well‐defined thermoresponsive dendritic polyamide/poly(N‐vinylcaprolactam) block copolymers

Well‐defined thermoresponsive dendritic polyamide/poly(N‐vinylcaprolactam) block copolymers

Stimuli-Responsive Polymers and their Potential Applications in Oil-Gas Industry

Thermo-, and pH dual-responsive poly(N-vinylimidazole): Preparation, characterization and its switchable catalytic activity

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