scholarly journals Cobalt-Mediated Radical Copolymerization of Chlorotrifluoroethylene and Vinyl Acetate

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 101 ◽  
Author(s):  
Pucheng Wang ◽  
Hu Wang ◽  
Qibao Dong ◽  
Ruke Bai
Keyword(s):  
Vinyl Acetate ◽  
Molar Mass ◽  
Radical Copolymerization ◽  
Chain Extension

Controlled radical copolymerization of chlorotrifluoroethylene (CTFE) and vinyl acetate (VAc) was successfully achieved in the presence of bis(acetylacetonato)cobalt(II) (Co(acac)2) as a mediated agent and 2,2′-azo-bis-isobutyronitrile (AIBN) as initiator. Both the molar mass and the fluorinated unit content of the copolymer could be controlled, and the chain extension polymerization of the obtained fluorinated copolymer was also achieved.

Free Radical Copolymerization of Ethylene with Vinyl Acetate under Mild Conditions

2017 ◽  
Vol 50 (9) ◽  
pp. 3516-3523 ◽  
Author(s):  
A. Zarrouki ◽  
E. Espinosa ◽  
C. Boisson ◽  
V. Monteil
Keyword(s):  
Free Radical ◽  
Vinyl Acetate ◽  
Radical Copolymerization ◽  
Free Radical Copolymerization ◽  
Mild Conditions

Hybridization of CMRP and ATRP: A Direct Living Chain Extension from Poly(vinyl acetate) to Poly(methyl methacrylate) and Polystyrene

2015 ◽  
Vol 48 (19) ◽  
pp. 6832-6838 ◽  
Author(s):  
Ya-Jo Chen ◽  
Bing-Jyun Wu ◽  
Fu-Sheng Wang ◽  
Mu-Huan Chi ◽  
Jiun-Tai Chen ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Vinyl Acetate ◽  
Chain Extension ◽  
Poly Methyl Methacrylate

scholarly journals Features of radical copolymerization initiated by manganese triacetylacetonate

2021 ◽  
pp. 11-14
Author(s):  
N. A. Lavrov
Keyword(s):  
Vinyl Acetate ◽  
Radical Copolymerization ◽  
Kinetics Of ◽  
Comprehensive Study

A comprehensive study of the kinetics of reactions of binary copolymerization of vinyl acetate with N-vinyl (N-vinylsuccinimide and N-vinyl-3(5)-methylpyrazole) and acrylic (2-hydroxyethylmethacrylate) monomers in different media was conducted. It is shown that the use of manganese triacetylacetonate as an initiator makes it possible to bring together the relative activities of monomers due to the complexation of manganese trisacetylacetonate and vinyl acetate molecules. This leads to a change in the microstructure of copolymers and to the production of macrochains with improved interleaving of monomeric links.

scholarly journals Cobalt-Mediated Radical Copolymerization of Vinylidene Fluoride and 2,3,3,3-Trifluoroprop-1-ene

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2676
Author(s):  
Panagiotis G. Falireas ◽  
Bruno Ameduri
Keyword(s):  
Diblock Copolymers ◽  
Molar Mass ◽  
Vinylidene Fluoride ◽  
Monomer Conversion ◽  
Radical Copolymerization ◽  
Reactivity Ratios ◽  
Mean Square ◽  
Kinetics Studies ◽  
Lower Reactivity ◽  
Fitting Model

New copolymers based on vinylidene fluoride (VDF) and 2,3,3,3-tetrafluoroprop-1-ene (1234yf) were synthesized by organometallic-mediated radical copolymerization (OMRcP) using the combination of bis(tert-butylcyclohexyl) peroxydicarbonate initiator and bis(acetylacetonato)cobalt(II), (Co(acac)2) as a controlling agent. Kinetics studies of the copolymerization of the fluoroalkenes copolymers were monitored by GPC and 19F NMR with molar masses up to 12,200 g/mol and dispersities (Đ) ranging from 1.33 to 1.47. Such an OMRcP behaves as a controlled copolymerization, evidenced by the molar mass of the resulting copolymer-monomer conversion linear relationship. The reactivity ratios, ri, of both comonomers were determined by using the Fineman-Ross and Kelen-Tüdos fitting model leading to rVDF = 0.384 ± 0.013 and r1234yf = 2.147 ± 0.129 at 60 °C, showing that a lower reactivity of VDF integrated in the copolymer to a greater extent leads to the production of gradient or pseudo-diblock copolymers. In addition, the Q (0.03) and e (0.06 and 0.94) parameters were assessed, as well as the dyad statistic distributions and mean square sequence lengths of PVDF and P1234yf.

Sign in / Sign up

Export Citation Format

Share Document