scholarly journals RAFT Copolymerization of Vinyl Acetate and N-Vinylcaprolactam: Kinetics, Control, Copolymer Composition, and Thermoresponsive Self-Assembly

2016 ◽  
Vol 49 (18) ◽  
pp. 6799-6809 ◽  
Author(s):  
Laura Etchenausia ◽  
Aurélie Malho Rodrigues ◽  
Simon Harrisson ◽  
Elise Deniau Lejeune ◽  
Maud Save
Keyword(s):  
Vinyl Acetate ◽  
Self Assembly ◽  
Copolymer Composition

scholarly journals Cellulose propionate/poly(N-vinyl pyrrolidone-co-vinyl acetate) blends: dependence of the miscibility on propionyl DS and copolymer composition

Cellulose ◽  
2013 ◽  
Vol 20 (1) ◽  
pp. 239-252 ◽  
Author(s):  
Kazuki Sugimura ◽  
Shougo Katano ◽  
Yoshikuni Teramoto ◽  
Yoshiyuki Nishio
Keyword(s):  
Vinyl Acetate ◽  
Vinyl Pyrrolidone ◽  
Copolymer Composition ◽  
Cellulose Propionate

The study of synthesis of poly(ethylene oxide)-b-poly(N,Ndimethylacrylamide) by atom transfer radical polymerization and self-assembly in selective solvents

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Yang Runmiao ◽  
Shi Ronghua ◽  
Zhou Dan ◽  
Wang Yanmei ◽  
Han Yanchun
Keyword(s):  
Ethylene Oxide ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Self Assembly ◽  
Copolymer Composition ◽  
Atom Transfer ◽  
Nmr Studies ◽  
Selective Solvents ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

AbstractPoly(ethylene oxide)-b-poly(N, N-dimethylacrylamide) (PEO-b-PDMA) was synthesized by successive atom transfer radical polymerization (ATRP) of N,N-dimethylacrylamide (DMA) monomer using PEO-Br macro initiators as initiator, CuBr and 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazamacrocyclotetra decane (Me6[14]aneN4) as catalyst and ligand.PEO-Br macroinitiator was synthesized by esterification of PEO with 2-bromoisobutyryl bromide. GPC and 1H NMR studies show that the plot of ln([DMA]0/[DMA]) against the reaction time is linear, and the molecular weight of the resulting PDMA increased linearly with the conversion. Within 3 h, the polymerization can reach almost 60% of conversion. PEO-b-PDMA copolymer with low polydispersity index (Mw/Mn≈1.1) is obtained. Self-assembly of PEO-b-PDMA in selective solvents is also studied. It could self-assemble into micelles in methanol/acetone (1/10, v/v) solution. TEM analyses of the PEO-b- PDMA micelles with narrow size distribution revealed that their size and shape depend much on the copolymer composition.

scholarly journals Poly(ethylene glycol)-b-poly(vinyl acetate) block copolymer particles with various morphologies via RAFT/MADIX aqueous emulsion PISA

2020 ◽  
Vol 11 (23) ◽  
pp. 3922-3930
Author(s):  
Paul Galanopoulo ◽  
Pierre-Yves Dugas ◽  
Muriel Lansalot ◽  
Franck D'Agosto
Keyword(s):  
Block Copolymer ◽  
Ethylene Glycol ◽  
Vinyl Acetate ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Poly Ethylene Glycol ◽  
Aqueous Emulsion ◽  
Amphiphilic Diblock Copolymers ◽  
Poly Ethylene

The polymerization-induced self-assembly (PISA) of amphiphilic diblock copolymers of poly(ethylene glycol)-b-poly(vinyl acetate) in water was achieved through macromolecular design via interchange of xanthate (MADIX) polymerization in emulsion.

RAFT Chemistry and Huisgen 1,3-Dipolar Cycloaddition: A Route to Block Copolymers of Vinyl Acetate and 6-O-Methacryloyl Mannose?

2007 ◽  
Vol 60 (6) ◽  
pp. 405 ◽  
Author(s):  
S. R. Simon Ting ◽  
Anthony M. Granville ◽  
Damien Quémener ◽  
Thomas P. Davis ◽  
Martina H. Stenzel ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Self Assembly ◽  
Average Molecular Weight ◽  
Dipolar Cycloaddition ◽  
Hydrodynamic Diameter ◽  
Transmission Electron ◽  
Reversible Addition ◽  
Polymer Distribution ◽  
Two Phases

The present communication explores a novel avenue to glycopolymer-block-poly(vinyl acetate) polymers by a combination of reversible addition fragmentation chain transfer (RAFT) chemistry and Huisgen 1,3-dipolar cycloaddition (i.e., so-called ‘click’ chemistry) under mild reaction conditions. Such block copolymers are—because of the strongly disparate reactivity of the two monomers—otherwise not obtainable. Poly(vinyl acetate) that has an azide end group (Mn 6800 g mol–1, PDI 1.15) was treated with poly(6-O-methacryloyl mannose) (Mn 7600 g mol–1, PDI 1.11) in the presence of 1,8-diaza[5,4,0]bicycloundec-7-ene and copper(i) iodide. The resulting poly(vinyl acetate)-block-poly(6-O-methacryloyl mannose) had a number-average molecular weight of 15400 g mol–1 and a PDI of 1.48, which indicates that while the cycloaddition had occurred the resulting polymer distribution featured a considerable width. The resulting slightly amphiphilic block copolymer was subsequently investigated with regard to its self-assembly in aqueous solution. Dynamic light scattering studies indicated a hydrodynamic diameter of close to 200 nm. Transmission electron microscopy studies indicate the formation of rods as well as spheres with transitions between these two phases. However, the segregation between core and shell in the spheres is not pronounced; such behaviour is expected for weakly amphiphilic block copolymers.

Sign in / Sign up

Export Citation Format

Share Document