Microwave-assisted one-step synthesis of poly(2-isopropyl-2-oxazoline) block copolymers using a dual initiator for CROP and RAFT polymerization

This paper reports the microwave-assisted, rapid, one-step synthesis of poly(2-isopropyl-2-oxazoline) (PiPrOx) block copolymers using 4-cyano-4-(dodecylthiocarbonothioylthio) pentyl-4-methylbenzenesulfonate (CDPS) and 4-cyano-4-(dodecylthiocarbonothioylthio)pentyl-4-nitrobenzenesulfonate (CDPN) dual...

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Bibliographic Details
Published in:Fibers and polymers 2017-06, Vol.18 (6), p.1215-1220
Main Authors: Kang, Munhyung, Cho, Minsang, Kim, Sunyoo, Youk, Ji Ho
Format: Article
Language:English
Subjects:
Addition polymerization
Block copolymers
Cationic polymerization
Chains (polymeric)
Chemical synthesis
Chemistry
Chemistry and Materials Science
Communication
Fragmentation
Initiators
Irradiation
Molecular weight
Polymer Sciences
Polymerization
Reaction kinetics
Ring opening polymerization
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Summary:This paper reports the microwave-assisted, rapid, one-step synthesis of poly(2-isopropyl-2-oxazoline) (PiPrOx) block copolymers using 4-cyano-4-(dodecylthiocarbonothioylthio) pentyl-4-methylbenzenesulfonate (CDPS) and 4-cyano-4-(dodecylthiocarbonothioylthio)pentyl-4-nitrobenzenesulfonate (CDPN) dual initiators for reversible addition-fragmentation chain-transfer (RAFT) polymerization and cationic ring opening polymerization (CROP). Kinetic investigations of the CROP of 2-isopropyl-2-oxazoline (iPrOx) initiated with CDPS and CDPN were conducted. The CROP of iPrOx initiated with CDPS did not follow first-order kinetics due to the slow initiation reaction, whereas the CROP of iPrOx initiated with CDPN followed first-order kinetics due to the fast and efficient initiation reaction. PiPrOx- b -poly( N , N -dimethylacrylamide) (PiPrOx- b -PDMA) block copolymers were synthesized using CDPN at 140 °C in a one-step procedure under microwave irradiation. The resulting PiPrOx- b -PDMA block copolymers showed narrow molecular weight distributions. Overall, CDPN is a useful dual initiator for the microwave-assisted one-step synthesis of PiPrOx block copolymers.
ISSN:1229-9197
1875-0052
DOI:10.1007/s12221-017-7309-2