Stabilization in Nonaqueous Radical Dispersion Polymerization with AB Block Copolymers of Polystyrene and Poly(dimethyl siloxane)

1981 ◽  
pp. 189-197 ◽  
Author(s):  
J. V. DAWKINS ◽  
G. TAYLOR ◽  
S. P. BAKER ◽  
R. W. R. COLLETT ◽  
J. S. HIGGINS
Keyword(s):  
Block Copolymers ◽  
Dispersion Polymerization ◽  
Dimethyl Siloxane

Block Copolymers in Emulsion and Dispersion Polymerization

2004 ◽  
Vol 25 (2) ◽  
pp. 401-435 ◽  
Author(s):  
Gérard Riess ◽  
Clorinthe Labbe
Keyword(s):  
Block Copolymers ◽  
Dispersion Polymerization

scholarly journals Dispersion Polymerization of Styrene Using Block Copolymers Composed of Polystyrene and Poly(vinyl acetate) as Stabilizers.

1993 ◽  
Vol 50 (4) ◽  
pp. 279-286 ◽  
Author(s):  
Kazutoshi TERADA ◽  
Hirotoshi MIYAZAKI ◽  
Mototsugu YOSHIHARA ◽  
Toshiaki SATO ◽  
Hitoshi MARUYAMA ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Dispersion Polymerization

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.

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