Atom transfer radical polymerization of methyl acrylate from a multifunctional initiator at ambient temperature
2002 (English)In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 43, no 15, 4237-4242 p.Article in journal (Refereed) Published
A multifunctional initiator for ATRP has been synthesized by reacting a hyperbranched polyether, based on 3-ethyl-3-(hydroxymethyl)oxetane, with 2-bromo-isobutyrylbromide. The macroinitiator contained approximately 25 initiating sites per molecule. It was used for the atom transfer radical polymerization of methyl acrylate mediated by Cu(I)Br and tris(2-(dimethylamino)ethyl)amine (Me-6-TREN) in ethyl acetate at room temperature. This yielded a co-polymer with a dendritic-linear architecture. The large number of growing chains from each macromolecule increases the probability of inter-and intramolecular reactions. In order to control these kinds of polymerizing systems and prevent them from forming a gel, the concentration of propagating radicals must be kept low. The polymerizations under these conditions were well controlled. When a ratio of initiating sites-to-catalyst of 1:0.05 was used, the polymers from all of the reactions had a low polydispersity, ranging from 1.1 to 1.4. None of the polymerizations under these conditions gave gelation. Monomer conversions as high as 65% were reached while maintaining control over the polymerization. (C) 2002 Elsevier Science Ltd. All rights reserved.
Place, publisher, year, edition, pages
OXFORD, ENGLAND: ELSEVIER SCI LTD , 2002. Vol. 43, no 15, 4237-4242 p.
atom transfer radical polymerization, 'living'/controlled radical polymerization, multifunctional initiator, RING-OPENING POLYMERIZATION, STAR POLYMERS, METHACRYLATE, POLYESTERS, POLYSTYRENE, COPOLYMERS, COMPLEXES, SYSTEM, BLOCK
IdentifiersURN: urn:nbn:se:kth:diva-13007DOI: 10.1016/S0032-3861(02)00258-6ISI: 000176108400017OAI: oai:DiVA.org:kth-13007DiVA: diva2:320181
QC 20100524 NR 201408042010-05-242010-05-242012-02-14Bibliographically approved