Macroinitiator Halide Effects in Galactoglucomannan-Mediated Single Electron Transfer-Living Radical Polymerization
2011 (English)In: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 49, no 19, 4139-4145 p.Article in journal (Refereed) Published
Chloro (Cl)- and bromo (Br)-functionalized macroinitiators were successfully prepared from the softwood hemicellulose O-acetylated galactoglucomannan (AcGGM) and then explored and evaluated with respect to their ability and efficiency of initiating single electron transfer-living radical polymerization (SET-LRP). Both halogenated species effectively initiate SET-LRP of an acrylate and a methacrylate monomer, respectively, yielding brushlike AcGGM graft copolymers, where the molecular weights are accurately controlled via the monomer:macroinitiator ratio and polymerization time over a broad range: from oligomeric to ultrahigh. The nature of the halogen does not influence the kinetics of polymerization strongly, however, for acrylate graft polymerization, AcGGM-Cl gives a somewhat higher rate constant of propagation, while methacrylate grafting proceeds slightly faster when the initiating species is AcGGM-Br. For both monomers, the macroinitiator efficiency is superior in the case of AcGGM-Br.
Place, publisher, year, edition, pages
2011. Vol. 49, no 19, 4139-4145 p.
graft copolymers, hemicellulose, living polymerization, macroinitiator, polysaccharides, single electron transfer-living radical polymerization (SET-LRP), single electron transfer (SET)
IdentifiersURN: urn:nbn:se:kth:diva-50815DOI: 10.1002/pola.24855ISI: 000295236300004ScopusID: 2-s2.0-80052189876OAI: oai:DiVA.org:kth-50815DiVA: diva2:462805
QC 201112092011-12-082011-12-082011-12-09Bibliographically approved