2-Cyanoprop-2-yl dithiobenzoate mediated reversible addition–fragmentation chain transfer polymerization of acrylonitrile targeting a polymer with a higher molecular weight

As an effective and versatile tool for production of functional polymer, RAFT polymerization has been successfully applied to the polymerization of block copolymers and other polymers of complex architectures with precisely controlled structure, molecular weight, and polydispersity. It has the ability to control polymerization of most monomers and has fine compatibility with reaction conditions. The present article summarized some of the features of the RAFT process, and reviewed the recent advances in the production of green polymers.

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Molecular-Weight Distribution of Living Chains in Polystyrene Prepared by Reversible Addition–Fragmentation Chain-Transfer Polymerization

Macromolecules ◽

10.1021/acs.macromol.9b01331 ◽

2019 ◽

Vol 52 (19) ◽

pp. 7448-7455 ◽

Cited By ~ 3

Author(s):

Kyoungho Kim ◽

Junyoung Ahn ◽

Mirim Park ◽

Hana Lee ◽

Yeon Ji Kim ◽

...

Keyword(s):

Molecular Weight ◽

Molecular Weight Distribution ◽

Weight Distribution ◽

Chain Transfer ◽

Reversible Addition ◽

Chain Transfer Polymerization

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Synthesis of Photoreactive Block Copolymers Based on 1-Iminopyridinium Ylides

Australian Journal of Chemistry ◽

10.1071/ch10079 ◽

2010 ◽

Vol 63 (8) ◽

pp. 1164 ◽

Cited By ~ 6

Author(s):

Patrick Theato ◽

Daniel Klinger

Keyword(s):

Molecular Weight ◽

Block Copolymers ◽

Chain Transfer ◽

Controlled Radical Polymerization ◽

Nmr Analysis ◽

Reversible Addition ◽

Nitroxide Mediated Polymerization ◽

Chain Transfer Polymerization ◽

Polymerization Conditions ◽

Pyridinium Ylide

Two photoreactive pyridinium ylide containing monomers, {[2-(metacryloyloxy)ethoxy]carbonyl}(pyridinium-1-yl)azanide (M1) and pyridinium-1-yl-(4-vinylbenzoyl)azanide (M2), were synthesized. Both monomers were polymerized under controlled radical polymerization conditions, i.e. reversible addition–fragmentation chain transfer polymerization (M1 and M2) and nitroxide-mediated polymerization (M2). Further block copolymers PMMA-b-PM1 and PS-b-PM2 were successfully synthesized and their molecular weight, Mn, and block ratio could be determined by 1H NMR analysis, thereby opening the synthetic possibilities of photoreactive ylides in block copolymer syntheses.

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Molecular Weight Evolution in the Catalytic Chain Transfer Polymerization of CO2-Expanded Methyl Methacrylate

Macromolecules ◽

10.1021/ma8000737 ◽

2008 ◽

Vol 41 (14) ◽

pp. 5141-5147 ◽

Cited By ~ 8

Author(s):

Grzegorz Zwolak ◽

Frank P. Lucien

Keyword(s):

Molecular Weight ◽

Methyl Methacrylate ◽

Chain Transfer ◽

Catalytic Chain Transfer ◽

Chain Transfer Polymerization

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Synthesis of aminated polystyrene and its self-assembly with nanoparticles at oil/water interface

e-Polymers ◽

10.1515/epoly-2020-0038 ◽

2020 ◽

Vol 20 (1) ◽

pp. 317-327

Author(s):

Chenliang Shi ◽

Ling Lin ◽

Yukun Yang ◽

Wenjia Luo ◽

Maoqing Deng ◽

...

Keyword(s):

Interfacial Tension ◽

Self Assembly ◽

Carbon Dots ◽

Chain Transfer ◽

Functionalized Polymers ◽

Amino Groups ◽

One Dimensional ◽

Reversible Addition ◽

Oil Water ◽

Chain Transfer Polymerization

AbstractThe influence of density of amino groups, nanoparticles dimension and pH on the interaction between end-functionalized polymers and nanoparticles was extensively investigated in this study. PS–NH2 and H2N–PS–NH2 were prepared using reversible addition–fragmentation chain transfer polymerization and atom transfer radical polymerization. Zero-dimensional carbon dots with sulfonate groups, one-dimensional cellulose nanocrystals with sulfate groups and two-dimensional graphene with sulfonate groups in the aqueous phase were added into the toluene phase containing the aminated PS. The results indicate that aminated PS exhibited the strongest interfacial activity after compounding with sulfonated nanoparticles at a pH of 3. PS ended with two amino groups performed better in reducing the water/toluene interfacial tension than PS ended with only one amino group. The dimension of sulfonated nanoparticles also contributed significantly to the reduction in the water/toluene interfacial tension. The minimal interfacial tension was 4.49 mN/m after compounding PS–NH2 with sulfonated zero-dimensional carbon dots.

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Nano-Assemblies from Amphiphilic PnBA-b-POEGA Copolymers as Drug Nanocarriers

Polymers ◽

10.3390/polym13071164 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1164

Author(s):

Angeliki Chroni ◽

Thomas Mavromoustakos ◽

Stergios Pispas

Keyword(s):

Molecular Weight ◽

Chain Transfer ◽

Raft Polymerization ◽

Polymeric Nanocarriers ◽

Reversible Addition ◽

2D Noesy ◽

Drug Nanocarriers ◽

Glycol Methyl Ether ◽

Different Molecular Weight

The focus of this study is the development of highly stable losartan potassium (LSR) polymeric nanocarriers. Two novel amphiphilic poly(n-butyl acrylate)-block-poly(oligo(ethylene glycol) methyl ether acrylate) (PnBA-b-POEGA) copolymers with different molecular weight (Mw) of PnBA are synthesized via reversible addition fragmentation chain transfer (RAFT) polymerization, followed by the encapsulation of LSR into both PnBA-b-POEGA micelles. Based on dynamic light scattering (DLS), the PnBA30-b-POEGA70 and PnBA27-b-POEGA73 (where the subscripts denote wt.% composition of the components) copolymers formed micelles of 10 nm and 24 nm in water. The LSR-loaded PnBA-b-POEGA nanocarriers presented increased size and greater mass nanostructures compared to empty micelles, implying the successful loading of LSR into the inner hydrophobic domains. A thorough NMR (nuclear magnetic resonance) characterization of the LSR-loaded PnBA-b-POEGA nanocarriers was conducted. Strong intermolecular interactions between the biphenyl ring and the butyl chain of LSR with the methylene signals of PnBA were evidenced by 2D-NOESY experiments. The highest hydrophobicity of the PnBA27-b-POEGA73 micelles contributed to an efficient encapsulation of LSR into the micelles exhibiting a greater value of %EE compared to PnBA30-b-POEGA70 + 50% LSR nanocarriers. Ultrasound release profiles of LSR signified that a great amount of the encapsulated LSR is strongly attached to both PnBA30-b-POEGA70 and PnBA27-b-POEGA73 micelles.

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