scholarly journals Fabrication and characterization of structurally stable pH-responsive polymeric vesicles by polymerization-induced self-assembly

RSC Advances ◽  
2021 ◽  
Vol 11 (46) ◽  
pp. 29042-29051
Author(s):  
Fen Zhang ◽  
Yanling Niu ◽  
Yantao Li ◽  
Qian Yao ◽  
Xiaoqi Chen ◽  
...  
Keyword(s):  
Self Assembly ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Ph Responsive ◽  
Polymeric Vesicles ◽  
Reversible Addition ◽  
Fabrication And Characterization ◽  
First Time ◽  
Structurally Stable

Smart polymeric vesicles with both tertiary amine and epoxy functional groups were fabricated for the first time via a reversible addition–fragmentation chain transfer dispersion polymerization approach.

The photo-controlled polymerization-induced self-assembly and reorganization process for fabrication of polymeric nanomaterials

2017 ◽  
Vol 1 (6) ◽  
pp. 1200-1206 ◽  
Author(s):  
Jiemei Zhou ◽  
Chunyan Hong ◽  
Caiyuan Pan
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Controlled Polymerization ◽  
Dimethylaminoethyl Methacrylate ◽  
Reversible Addition

A visible light mediated reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of benzyl methacrylate (BzMA) is conducted in ethanol using poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) as a macro-chain transfer agent (macro-CTA), affording polymeric nanomaterials with various morphologies.

scholarly journals In Situ Formation of Core–Shell Nanoparticles in Epoxy Resin via Reversible Addition–Fragmentation Chain Transfer Dispersion Polymerization

2021 ◽  
Author(s):  
Eun Ho Lee ◽  
Kyungho Kim ◽  
Gyeongdong Yeom ◽  
Bongkuk Seo ◽  
Wonjoo Lee ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Shell Nanoparticles ◽  
Reversible Addition ◽  
Resin Mixture ◽  
In Situ Formation ◽  
Core Shell Nanoparticles ◽  
First Time

We report for the first time in situ reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization in an epoxy resin mixture for toughening of epoxy. Good dispersion of latex particles in...

Polymerization-induced self-assembly: ethanolic RAFT dispersion polymerization of 2-phenylethyl methacrylate

2014 ◽  
Vol 5 (7) ◽  
pp. 2342-2351 ◽  
Author(s):  
Yiwen Pei ◽  
Andrew B. Lowe
Keyword(s):  
Self Assembly ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Degree Of Polymerization ◽  
Average Degree ◽  
Macromolecular Chain ◽  
Ethyl Methacrylate ◽  
Reversible Addition ◽  
Transfer Agents

Reversible addition-fragmentation chain transfer (RAFT) radical dispersion polymerization (RAFTDP) has been employed to polymerize 2-phenylethyl methacrylate (PEMA) using poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) macromolecular chain transfer agents (macro-CTAs) of varying average degree of polymerization (X̄n).

scholarly journals Well-defined polyvinylpyridine-block-polystyrene diblock copolymers via RAFT aqueous-alcoholic dispersion polymerization: Synthesis and isoporous thin film morphology

2021 ◽  
Author(s):  
Katharina Nieswandt ◽  
Prokopios Georgopanos ◽  
Volker Abetz
Keyword(s):  
Thin Film ◽  
Dispersion Polymerization ◽  
Diblock Copolymers ◽  
Chain Transfer ◽  
Synthesis And Characterization ◽  
Film Morphology ◽  
Reversible Addition

In this work, the synthesis and characterization of polyvinylpyridine-polystyrene (PVP-b-PS) diblock copolymers via reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization is presented. A series of poly(4-vinylpyridine) (P4VP) and poly(2-vinylpyridine) (P2VP)...

scholarly journals In situ SAXS studies of a prototypical RAFT aqueous dispersion polymerization formulation: monitoring the evolution in copolymer morphology during polymerization-induced self-assembly

2020 ◽  
Vol 11 (42) ◽  
pp. 11443-11454 ◽  
Author(s):  
Adam Czajka ◽  
Steven P. Armes
Keyword(s):  
Diblock Copolymer ◽  
Small Angle ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Aqueous Dispersion ◽  
X Ray ◽  
X Ray Scattering ◽  
Reversible Addition

In situ small-angle X-ray scattering is used to monitor the formation of diblock copolymer spheres, worms and vesicles during reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion polymerization of 2-hydroxypropyl methacrylate.

scholarly journals Semi-Fluorinated Di and Triblock Copolymer Nano-Objects Prepared via RAFT Alcoholic Dispersion Polymerization (PISA)

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2502
Author(s):  
Gregoire Desnos ◽  
Adrien Rubio ◽  
Chaimaa Gomri ◽  
Mathias Gravelle ◽  
Vincent Ladmiral ◽  
...  
Keyword(s):  
Self Assembly ◽  
Triblock Copolymer ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
The Self ◽  
The Core ◽  
Transmission Electron ◽  
Reversible Addition ◽  
Polymerization Conditions

A set of well-defined amphiphilic, semi-fluorinated di and triblock copolymers were synthesized via polymerization-induced self-assembly (PISA) under alcoholic dispersion polymerization conditions. This study investigates the influence of the length, nature and position of the solvophobic semi-fluorinated block. A poly(N,N-dimethylaminoethyl methacrylate) was used as the stabilizing block to prepare the di and tri block copolymer nano-objects via reversible addition-fragmentation chain transfer (RAFT) controlled dispersion polymerization at 70 °C in ethanol. Benzylmethacrylate (BzMA) and semi-fluorinated methacrylates and acrylates with 7 (heptafluorobutyl methacrylate (HFBMA)), 13 (heneicosafluorododecyl methacrylate (HCFDDMA)) and 21 (tridecafluorooctyl acrylate (TDFOA)) fluorine atoms were used as monomers for the core-forming blocks. The RAFT polymerization of these semi-fluorinated monomers was monitored by SEC and 1H NMR. The evolution of the self-assembled morphologies was investigated by transmission electron microscopy (TEM). The results demonstrate that the order of the blocks and the number of fluorine atoms influence the microphase segregation of the core-forming blocks and the final morphology of the nano-objects.

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

e-Polymers ◽  
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.

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

Polymers ◽  
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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