scholarly journals Statistical and Block Copolymers of Ethylene and Vinyl Acetate via Reversible Addition‐Fragmentation Chain Transfer Polymerization

2021 ◽  
pp. 2100270
Author(s):  
Arne Wolpers ◽  
Florian Baffie ◽  
Vincent Monteil ◽  
Franck D'Agosto
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Chain Transfer ◽  
Reversible Addition ◽  
Chain Transfer Polymerization

RAFT Polymerization of Monomers with Highly Disparate Reactivities: Use of a Single RAFT Agent and the Synthesis of Poly(styrene-block-vinyl acetate)

2013 ◽  
Vol 66 (12) ◽  
pp. 1564 ◽  
Author(s):  
Lily A. Dayter ◽  
Kate A. Murphy ◽  
Devon A. Shipp
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Good Control ◽  
Scanning Calorimetry ◽  
Styrene Polymerization ◽  
Reversible Addition ◽  
Raft Agent ◽  
End Group

A single reversible addition–fragmentation chain transfer (RAFT) agent, malonate N,N-diphenyldithiocarbamate (MDP-DTC) is shown to successfully mediate the polymerization of several monomers with greatly differing reactivities in radical/RAFT polymerizations, including both vinyl acetate and styrene. The chain transfer constants (Ctr) for MDP-DTC for both these monomers were evaluated; these were found to be ~2.7 in styrene and ~26 in vinyl acetate, indicating moderate control over styrene polymerization and good control of vinyl acetate polymerization. In particular, the MDP-DTC RAFT agent allowed for the synthesis of block copolymers of these two monomers without the need for protonation/deprotonation switching, as has been previously developed with N-(4-pyridinyl)-N-methyldithiocarbamate RAFT agents, or other end-group transformations. The thermal properties of the block copolymers were studied using differential scanning calorimetry, and those with sufficiently high molecular weight and styrene composition appear to undergo phase separation. Thus, MDP-DTC may be useful for the production of other block copolymers consisting of monomers with highly dissimilar reactivities.

Miniemulsion reversible addition fragmentation chain transfer polymerization of vinyl acetate

2005 ◽  
Vol 43 (10) ◽  
pp. 2188-2193 ◽  
Author(s):  
James P. Russum ◽  
Nicholas D. Barbre ◽  
Christopher W. Jones ◽  
F. Joseph Schork
Keyword(s):  
Vinyl Acetate ◽  
Chain Transfer ◽  
Reversible Addition ◽  
Chain Transfer Polymerization
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