Influence of a reversible addition–fragmentation chain transfer agent in the dispersion polymerization of styrene

2006 ◽  
Vol 45 (3) ◽  
pp. 348-360 ◽  
Author(s):  
Prakash J. Saikia ◽  
Jung Min Lee ◽  
Byung H. Lee ◽  
Soonja Choe
Keyword(s):  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Reversible Addition

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.

Narrow‐disperse, cross‐linked polymer microspheres by one‐step dispersion polymerization with a chain transfer agent

2019 ◽  
Vol 31 (3) ◽  
pp. 407-414
Author(s):  
Hongxin Wang ◽  
Baijun Liu ◽  
Mingyao Zhang ◽  
Shuai Du ◽  
Gaocheng Wu ◽  
...  
Keyword(s):  
Dispersion Polymerization ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Polymer Microspheres ◽  
One Step ◽  
A Chain

Homophase and heterophase polymerizations of butyl acrylate mediated by poly(acrylic acid) as a reversible addition–fragmentation chain-transfer agent

2015 ◽  
Vol 57 (6) ◽  
pp. 547-559 ◽  
Author(s):  
E. V. Chernikova ◽  
A. V. Plutalova ◽  
K. O. Mineeva ◽  
I. R. Nasimova ◽  
E. Yu. Kozhunova ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Butyl Acrylate ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Reversible Addition ◽  
Poly Acrylic Acid

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.

scholarly journals Synthesis of bottlebrush polymers via transfer-to and grafting-through approaches using a RAFT chain transfer agent with a ROMP-active Z-group

2015 ◽  
Vol 6 (31) ◽  
pp. 5643-5652 ◽  
Author(s):  
Scott C. Radzinski ◽  
Jeffrey C. Foster ◽  
John B. Matson
Keyword(s):  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Multiple Strategies ◽  
Reversible Addition ◽  
Grafting Through ◽  
Chain Transfer Polymerization

A novel dithiocarbamate chain transfer agent for reversible addition–fragmentation chain transfer polymerization with a directly polymerizable Z-group was synthesized and used to make bottlebrush polymers via multiple strategies.

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.

Copolymerization of Glycidyl Methacrylate and 1,1,1,3,3,3-Hexafluoroisopropyl Acrylate

2021 ◽  
Vol 899 ◽  
pp. 387-391
Author(s):  
Alexandra O. Grigoreva ◽  
Kseniia Tarankova ◽  
Sergey D. Zaitsev
Keyword(s):  
Glycidyl Methacrylate ◽  
Molar Mass ◽  
Chain Transfer ◽  
Good Control ◽  
Chain Transfer Agent ◽  
Polymeric Chain ◽  
Reactivity Ratios ◽  
Reversible Addition

The copolymerization of 1,1,1,3,3,3-hexafluoroisopropyl acrylate (HFIPA) and glycidyl methacrylate via reversible addition-fragmentation chain transfer (RAFT) process was investigated. 2-cyano-2-propyl dodecyl trithiocarbonate (CPDT) was used as chain transfer agent. It is turned out that CPDT and polymeric chain transfer agent obtained based on HFIPA and CPDT provide a good control over molar mass characteristic of copolymers (Đ = 1.05). Reactivity ratios were found to be r1(GMA) = 1.57 and r2(HFIPA) = 0.05 by Fineman–Ross model.

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