Synthesis of thermoresponsive poly(N-isopropylmethacrylamide) and poly(acrylic acid) block copolymers via post-functionalization of poly(N-methacryloxysuccinimide)

Rathfon, Jeremy M.; Tew, Gregory N.

doi:10.1016/j.polymer.2008.01.071

Cited by 33 publications

(25 citation statements)

References 56 publications

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“…33 By copolymerizing NHSMA and 2-(pyridin-2-yldisulfanyl)ethyl methacrylate (PDSEMA) under ATRP conditions, Thayumanavan and coworkers came up with an orthogonal and reversible functionalization of copolymers featuring activated esters with molecular weights up to 19,000 g/mol and fair molecular weight distributions varying between 1.3 and 1.6. 34 Rathfon and Tew 35 could show that reactive polymers synthesized by ATRP of NHSMA are ideal precursors for synthesis of thermoresponsive poly(N-isopropylmethacrylamide) block copolymers with a LCST phase transition varying from 35 to 60 C. ATRP has also been applied to alternative acrylic activated esters. For example, the ATRP of endo-N-Hydroxy-5-norborene-2,3-dicarboxyimidacrylate (NorbNHSA) in DMSO with CuBr and 2,2 0 -bipyridine as the catalyst and ethyl ethyl-2-bromoisobutyrate as the initiator led to polymers with a narrow molecular weight distribution (M w /M n \ 1.3), while maintaining a quantitative initiator efficiency.…”

Section: Preparation Of Defined Reactive Polymer Architectures By Conmentioning

confidence: 99%

Synthesis of well‐defined polymeric activated esters

Théato

2008

J. Polym. Sci. A Polym. Chem.

277

260

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Monomers bearing an activated ester group can be polymerized under various controlled polymerization techniques, such as ATRP, NMP, RAFT polymerization, or ROMP. Combining the functionalization of polymers via polymeric activated esters with these controlled polymerization techniques generate possibilities to realize highly functionalized polymer architectures. Within this highlight two different research areas of activated esters in polymer science will be discussed: (i) the preparation of defined reactive polymer architectures by controlled polymerization techniques and (ii) the preparation of defined reactive thin films. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 6677–6687, 2008

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Section: Preparation Of Defined Reactive Polymer Architectures By Conmentioning

confidence: 99%

Synthesis of well‐defined polymeric activated esters

Théato

2008

J. Polym. Sci. A Polym. Chem.

277

260

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“…4 shows the 1 H-NMR spectrum; the assignments and chemical shifts of the 1 H signals are given as below d (ppm): 1.4-2.1 (-CH 2 -), 2.75-3.07 (-CHCO-) [39], we have also observed a small peak at 12.0-12.1 can be attributed to the carboxylic acid (-COOH) [40].…”

Section: Nmr Spectroscopymentioning

confidence: 96%

A method for inhibiting scale formation and corrosion in a cooling water system

Brinis

Samar

2014

Desalination and Water Treatment

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A B S T R A C TThe polymeric inhibitors made show promise inhibiting corrosion and scale formation in the recirculating cooling water system. In this paper, polymer blends were prepared by mixing an anionic polymer, poly(acrylic acid) and polyaniline dispersion. The blends have been evaluated for their effectiveness to retain the dissolved minerals in the cooling water and to protect carbon steel against corrosion in alkaline recirculating cooling water conditions. Monthly water analyses have been conducted on makeup and recirculating cooling waters in the presence of the new treatment, and the active chemical components were monitored. Stressed system conditions have been established by increasing the temperature (15-50 C) and cycles of concentration (1.5-4.5 cycles) to perform a series of scales and corrosion tests. The results obtained from these studies show that the present polymer blends used at 100 ppm concentration have an inhibiting effect on the calcium and magnesium scales up to 91 and 82%, respectively. The weight loss and corrosion polarization resistance method (Corrater system) measurements were carried out to investigate the ability of polymer blends to inhibit within the aqueous system the corrosion of carbon steel. An inhibition efficiency of nearly 81% is achieved for 100 mg/L concentration of polymer blends.

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“…Therefore, this magneto thermo-responsive hydrogel offers an interesting and unique means to study cell behavior on a dynamic substrate. Nevertheless the system can be further improved using, for example, co-polymers where the LCST can be tuned around 37°C [54].…”

Section: Amf Heating and Dynamic Phase Changementioning

confidence: 99%

Dynamic and biocompatible thermo-responsive magnetic hydrogels that respond to an alternating magnetic field

Crippa

Moore

Mortato

et al. 2017

Journal of Magnetism and Magnetic Materials

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Magnetic thermo-responsive hydrogels are a new class of materials that have recently attracted interest in biomedicine due to their ability to change phase upon magnetic stimulation. They have been used for drug release, magnetic hyperthermia treatment, and can potentially be engineered as stimuli-responsive substrates for cell mechanobiology. In this regard, we propose a series of magnetic thermo-responsive nanocomposite substrates that undergo cyclical swelling and de-swelling phases when actuated by an alternating magnetic field in aqueous environment. The synthetized substrates are obtained with a facile and reproducible method from poly-N-isopropylacrylamide and superparamagnetic iron oxide nanoparticles. Their conformation and the temperature-related, magnetic, and biological behaviors were characterized via scanning electron microscopy, swelling ratio analysis, vibrating sample magnetometry, alternating magnetic field stimulation and indirect viability assays. The nanocomposites showed no cytotoxicity with fibroblast cells, and exhibited swelling/deswelling behavior near physiological temperatures (around 34°C). Therefore these magnetic thermo-responsive hydrogels are promising materials as stimuli-responsive substrates allowing the study of cell-behavior by changing the hydrogel properties in situ.

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Synthesis of thermoresponsive poly(N-isopropylmethacrylamide) and poly(acrylic acid) block copolymers via post-functionalization of poly(N-methacryloxysuccinimide)

Cited by 33 publications

References 56 publications

Synthesis of well‐defined polymeric activated esters

Synthesis of well‐defined polymeric activated esters

A method for inhibiting scale formation and corrosion in a cooling water system

Dynamic and biocompatible thermo-responsive magnetic hydrogels that respond to an alternating magnetic field

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