Growing Crosslinker: Gel Synthesis Using Novel Divinyl Crosslinker with Expanding Chain-Length between Vinyl Groups by RAFT Polymerization

In order to manage the network structure of vinylic polymer gels, a novel bifunctional divinyl-crosslinker (dv-CTA) was designed by introducing a trithiocarbonate (TTC) group. This functionalized crosslinker could grow to extend the chain-length between two vinyl groups throughout the gelation react...

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Bibliographic Details
Published inKOBUNSHI RONBUNSHU Vol. 72; no. 7; pp. 440 - 446
Main Authors IDA, Shohei, FURUKAWA, Shoichi, TANIMOTO, Satoshi, HIROKAWA, Yoshitsugu
Format Journal Article
LanguageJapanese
Published The Society of Polymer Science, Japan 25.06.2015
Subjects
Crosslinker
Gel
RAFT Polymerization
Trithiocarbonate
Vinyl Monomer
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Summary:In order to manage the network structure of vinylic polymer gels, a novel bifunctional divinyl-crosslinker (dv-CTA) was designed by introducing a trithiocarbonate (TTC) group. This functionalized crosslinker could grow to extend the chain-length between two vinyl groups throughout the gelation reaction, since the TTC group functions as a chain transfer agent for reversible addition-fragmentation chain transfer (RAFT) polymerization. This growing crosslinker was found to lead to the improvement of crosslinking efficiency in poly(N-isopropylacrylamide) (PNIPAAm) gel synthesis by RAFT polymerization in combination with a conventional crosslinker, N,N′-methylenebisacrylamide (BIS). This result can be explained by reduced steric hindrance between the network chain and the vinyl group, originating from the crosslinker, when the crosslinker grows. Therefore the growing chain allows enhanced crosslinking.
ISSN:0386-2186
1881-5685
DOI:10.1295/koron.2014-0098