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).

Ethanolic RAFT Dispersion Polymerization of 2-(Naphthalen-2-yloxy)ethyl Methacrylate and 2-Phenoxyethyl Methacrylate with Poly[2-(dimethylamino)ethyl Methacrylate] Macro-Chain Transfer Agents

2015 ◽  
Vol 68 (6) ◽  
pp. 939 ◽  
Author(s):  
Yiwen Pei ◽  
Nadia C. Dharsana ◽  
Andrew B. Lowe
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Narrow Range ◽  
Degree Of Polymerization ◽  
Size Exclusion ◽  
Full Spectrum ◽  
Ethyl Methacrylate ◽  
Reversible Addition

The ethanolic reversible addition-fragmentation chain transfer dispersion polymerization (RAFTDP), at 21 wt-%, of 2-(naphthalen-2-yloxy)ethyl methacrylate (NOEMA) and 2-phenoxyethyl methacrylate (POEMA) with a poly[2-(dimethylamino)ethyl methacrylate] macro-chain transfer agent (CTA) with an average degree of polymerization of 20 (PDMAEMA20) is described. DMAEMA20-b-NOEMAy (y = 20–125) block copolymers were readily prepared under dispersion conditions in ethanol at 70°C. However, the polymerization of NOEMA was not well controlled, with size exclusion chromatograms being distinctly bi or multimodal with measured dispersities . Though NOEMA copolymerization was not ideal, the resulting series of block copolymers did exhibit the anticipated full spectrum of nanoparticle morphologies (spheres, worms, and vesicles). Interestingly, these morphology transitions occurred over a relatively narrow range of block copolymer compositions. In the case of POEMA, copolymerization was also poorly controlled with 1.50 ≤ ĐM ≤ 1.83 for the series of DMAEMA20-b-POEMAy copolymers. In contrast to the NOEMA-based copolymers, the POEMA series only yielded nanoparticles with a spherical morphology whose size increased with increasing average degrees of polymerization of the POEMA block. Collectively, though both NOEMA and POEMA can be utilized in ethanolic RAFT dispersion polymerization formulations, these preliminary studies suggest that neither appears to be an ideal aryl methacrylate choice as comonomer, especially if the goal is to combine the synthesis of well-defined copolymers with efficient nanoparticle formation.

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.

RAFT dispersion polymerization of 3-phenylpropyl methacrylate with poly[2-(dimethylamino)ethyl methacrylate] macro-CTAs in ethanol and associated thermoreversible polymorphism

Soft Matter ◽  
2014 ◽  
Vol 10 (31) ◽  
pp. 5787-5796 ◽  
Author(s):  
Yiwen Pei ◽  
Nadia C. Dharsana ◽  
Johannes A. van Hensbergen ◽  
Robert P. Burford ◽  
Peter J. Roth ◽  
...  
Keyword(s):  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Polymeric Nanoparticles ◽  
Direct Synthesis ◽  
Ethyl Methacrylate ◽  
Reversible Addition

The direct synthesis of methacrylic-based soft polymeric nanoparticles via reversible addition–fragmentation chain transfer dispersion polymerization (RAFTDP) is described.

Polymerization‐induced self‐assembly of amino‐acid‐based nano‐objects by reversible addition–fragmentation chain‐transfer dispersion polymerization

2021 ◽  
Author(s):  
Kazunori Masuko ◽  
Chiharu Kumano ◽  
Ryo Sugawara ◽  
Kazuhiro Nakabayashi ◽  
Hideharu Mori
Keyword(s):  
Amino Acid ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Reversible Addition

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 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.

Monodisperse poly(methyl methacrylate) microspheres with tunable carboxyl groups on the surface obtained by photoinitiated RAFT dispersion polymerization

2019 ◽  
Vol 55 (54) ◽  
pp. 7848-7851 ◽  
Author(s):  
Liangliang Yu ◽  
Yuxuan Zhang ◽  
Xiaocong Dai ◽  
Li Zhang ◽  
Jianbo Tan
Keyword(s):  
Methyl Methacrylate ◽  
Binary Mixtures ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Carboxyl Groups ◽  
Polymeric Microspheres ◽  
Poly Methyl Methacrylate ◽  
Macromolecular Chain ◽  
Transfer Agents

Monodisperse polymeric microspheres with tunable carboxy groups on the surface are prepared by photoinitiated RAFT dispersion polymerization using binary mixtures of two macromolecular chain transfer agents (macro-CTAs).

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.

Pseudoliving polymerization of vinyl acetate mediated by reversible addition-fragmentation chain-transfer agents

2011 ◽  
Vol 53 (7-8) ◽  
pp. 437-447 ◽  
Author(s):  
E. V. Chernikova ◽  
V. V. Yulusov ◽  
K. O. Mineeva ◽  
V. B. Golubev ◽  
E. S. Garina
Keyword(s):  
Vinyl Acetate ◽  
Chain Transfer ◽  
Reversible Addition ◽  
Transfer Agents
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