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.

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.

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).

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 Blue Light-Initiated Alcoholic RAFT Dispersion Polymerization of Benzyl Methacrylate: A Detailed Study

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1284 ◽  
Author(s):  
Dongdong Liu ◽  
Ruiming Zeng ◽  
Hao Sun ◽  
Li Zhang ◽  
Jianbo Tan
Keyword(s):  
Blue Light ◽  
Reaction Temperature ◽  
Diblock Copolymer ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Monomer Conversion ◽  
Water Mixture ◽  
Mixture Effects ◽  
Transmission Electron ◽  
Reversible Addition

Blue light-initiated alcoholic reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of benzyl methacrylate (BzMA) using bis (acyl) phosphane oxide (BAPO) as the photo-initiator is developed to prepare diblock copolymer nano-objects. High monomer conversion (95%) was achieved within 2 h of blue light irradiation in an isopropanol/water mixture. Effects of solvent, light intensity, and reaction temperature on the polymerization kinetics were evaluated. Finally, the effect of reaction temperature on the morphologies of diblock copolymer nano-objects was investigated and two morphological phase diagrams were constructed at 25 and 70 °C. Transmission electron microscopy (TEM) measurement confirmed that increasing the reaction temperature promoted the evolution of higher order morphology. We believe this study will provide more mechanistic insights into alcoholic RAFT dispersion polymerization for the creation of diblock copolymer nano-objects with well-defined structures.

Invertible vesicles and micelles formed by dually-responsive diblock random copolymers in aqueous solutions

Soft Matter ◽  
2014 ◽  
Vol 10 (32) ◽  
pp. 5886-5893 ◽  
Author(s):  
Mohammad T. Savoji ◽  
Satu Strandman ◽  
X. X. Zhu
Keyword(s):  
Aqueous Solutions ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Random Copolymers ◽  
Ethyl Methacrylate ◽  
Reversible Addition

Dually responsive diblock random copolymers poly(nPA0.8-co-DEAEMA0.2)-block-poly(nPA0.8-co-EA0.2) were made from random blocks of N-n-propylacrylamide (nPA), 2-(diethylamino)ethyl methacrylate (DEAEMA) and N-ethylacrylamide (EA) via reversible addition–fragmentation chain transfer (RAFT) polymerization.

scholarly journals RAFT dispersion polymerization of glycidyl methacrylate for the synthesis of epoxy-functional block copolymer nanoparticles in mineral oil

2019 ◽  
Vol 10 (5) ◽  
pp. 603-611 ◽  
Author(s):  
Philip J. Docherty ◽  
Matthew J. Derry ◽  
Steven P. Armes
Keyword(s):  
Block Copolymer ◽  
Diblock Copolymer ◽  
Glycidyl Methacrylate ◽  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Mineral Oil ◽  
Functional Block ◽  
Reversible Addition ◽  
Stearyl Methacrylate

Epoxy-functional poly(stearyl methacrylate)-poly(glycidyl methacrylate) (PSMA-PGlyMA) diblock copolymer nanoparticles are synthesized via reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of glycidyl methacrylate (GlyMA) in mineral oil at 70 °C.

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...

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