New Functional Block Copolymers via RAFT Polymerization and Polymer‐Analogous Reaction

Strube, Oliver I.; Nothdurft, Lars; Абишева, З. С.; Schmidt‐Naake, Gudrun

doi:10.1002/macp.201200026

Cited by 17 publications

(16 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By reaction of epoxy groups with a variety of nucleophiles allows obtaining several derivative polymers. Reactions of PGMA with primary [47][48][49] and secondary amines [49][50][51] have attracted great attention (see Fig. 3).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and stabilization of Pt nanoparticles in core cross-linked micelles prepared from an amphiphilic diblock copolymer

Koçak

Bütün

2015

Colloid Polym Sci

View full text Add to dashboard Cite

In this study, an amphiphilic poly(ethylene glycol)methyl ether-block-poly(glycidyl methacrylate) diblock copolymer (MPEG-b-PGMA) was synthesized via atom transfer radical polymerization (ATRP), and its micellar solution was prepared in acetone/water mixture. Core crosslinked (CCL) micelles were synthesized by cross-linking the epoxy functional group of poly(glycidyl methacrylate) block with ethylenediamine. These CCL micelles were used in the synthesis and stabilization of platinum nanoparticles (PtNPs) in aqueous media. Transmission electron microscopy (TEM) images showed that well-dispersed PtNPs with a diameter of around 5 nm were formed within the MPEG-b-PGMA spherical CCL micelles having 22.0±3.0 nm diameters. The mean TEM diameter of the PtNPs is of the order of several nanometers, which is consistent with the plasmon absorption peaks observed at around 205 and 261 nm. The catalytic activity of CCL micelle-PtNP dispersion was also investigated in the reduction of p-nitrophenol to p-aminophenol in the presence of NaBH 4 . The results showed that the PtNPs exhibit a good catalytic activity toward reduction of p-nitrophenol. CCL micelle-stabilized PtNP dispersions were stable for long periods of time without changing properties at room temperature. CCL micelles found to be good hostage or stabilizer for the NPs in aqueous media.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and stabilization of Pt nanoparticles in core cross-linked micelles prepared from an amphiphilic diblock copolymer

Koçak

Bütün

2015

Colloid Polym Sci

View full text Add to dashboard Cite

show abstract

“…This can be attributed to the selective polymerization of double bond and oxirane rings in GMA. In addition, the oxirane ring in GMA can be modified with nucleophiles, such as the thiols, [14][15][16][17][18] amines, [19][20][21] diphenyl phosphoryl chloride ((C 6 H 5 ) 2 POCl), [22] sodium azide (NaN 3 ), [23][24][25] and others. [26][27][28][29] For example, using bifunctional ethylene diamine (EDA) or 2-aminoethanethiol (AET) as crosslinking agent, the PGMA blocks in a micellar system can be easily crosslinked.…”

Section: Doi: 101002/marc201800332mentioning

confidence: 99%

In Situ Crosslinking of Nanoparticles in Polymerization‐Induced Self‐Assembly via ARGET ATRP of Glycidyl Methacrylate

Wang

et al. 2018

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Polymerization-induced self-assembly (PISA) and in situ crosslinking of the formed nanoparticles are successfully realized by activators regenerated by electron-transfer atom transfer radical polymerization (ARGET ATRP) of glycidyl methacrylate (GMA) or a mixture of GMA/benzyl methacrylate (BnMA) monomers in ethanol. Poly(oligo(ethylene oxide) methyl ether methacrylate) was employed as macroinitiator/stabilizer, and a cupric bromide/tris(pyridin-2-ylmethyl)amine complex as catalyst. Tin (2-ethylhexanoate) was used as reducing agent for ARGET ATRP, and simultaneously acted as a catalyst for ring-opening polymerization of oxirane ring in GMA. The kinetics shows that the double bond in GMA was completely polymerized in 4.0 h, while only a 33% conversion of oxirane ring in GMA was reached at 117.0 h. Such a large difference would guarantee a smooth PISA and a subsequent in situ crosslinking of formed nanoparticles. The transmission electron microscopy and dynamic light scattering show spherical nanoparticles formed. With a feed molar ratio [BnMA] /[GMA] = 150/50, 100/100, and 50/150, the nanoparticles formed in ethanol can dissociate or swell in toluene. When pure GMA was used, the solid nanoparticles were observed in toluene or ethanol. The ARGET ATRP provides an efficient strategy to stabilize the nanoparticles formed in the PISA of GMA-containing system.

show abstract

“…The addition of nucleophiles to epoxide‐functionalized polymers under neutral or basic conditions generates polymer‐bound alkoxide anions, which react with the epoxide groups of neighboring chains, leading to cross‐linking. Suppression of these undesirable reactions is usually accomplished by employing large excesses of protic nucleophiles, including amines, carboxylic acids, thiols, or azides in the presence of proton sources …”

Section: Introductionmentioning

confidence: 99%

Well-defined epoxide-containing styrenic polymers and their functionalization with alcohols

McLeod

Tsarevsky

2015

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

View full text Add to dashboard Cite

Polymers containing electrophilic moieties, such as activated esters, epoxides, and alkyl halides, can be readily modified with a variety of nucleophiles to produce useful functional materials. The modification of epoxide-containing polymers with amines and other strong nucleophiles is welldocumented, but there are no reports on the modification of such polymers with alcohols. Using phenyloxirane and glycidyl butyrate as low molecular weight model compounds, it was determined that the acid-catalyzed ring-opening of arylsubstituted epoxides by alcohols to form b-hydroxy ether products was significantly more efficient than that of alkylsubstituted epoxides. An aryl epoxide-type styrenic monomer, 4-vinylphenyloxirane (4VPO), was synthesized in high yield using an improved procedure and then polymerized in a controlled manner under reversible addition-fragmentation chaintransfer (RAFT) polymerization conditions. A successful chain extension with styrene proved the high degree of chain-end functionalization of the poly4VPO-based macro chain transfer agent. Poly4VPO was modified with a library of alcohols and phenols, some of which contained reactive functionalities, e.g., azide, alkyne, allyl, etc., using either CBr 4 (in PhCN at 90 8C for 2-3 days) or BF 3 (in CH 2 Cl 2 at ambient temperature over 30 min) as the catalyst. The resulting b-hydroxy ether-functionalized homopolymers were characterized using size exclusion chromatography, 1 H NMR and IR spectroscopy, and thermal gravimetric analysis.

show abstract

New Functional Block Copolymers via RAFT Polymerization and Polymer‐Analogous Reaction

Cited by 17 publications

References 18 publications

Synthesis and stabilization of Pt nanoparticles in core cross-linked micelles prepared from an amphiphilic diblock copolymer

Synthesis and stabilization of Pt nanoparticles in core cross-linked micelles prepared from an amphiphilic diblock copolymer

In Situ Crosslinking of Nanoparticles in Polymerization‐Induced Self‐Assembly via ARGET ATRP of Glycidyl Methacrylate

Well-defined epoxide-containing styrenic polymers and their functionalization with alcohols

Contact Info

Product

Resources

About