Establishing α-bromo-γ-butyrolactone as a platform for synthesis of functional aliphatic polyesters-bridging the gap between ROP and SET-LRP
2014 (English)In: Polymer Chemistry, ISSN 1759-9954, Vol. 5, no 12, 3847-3854 p.Article in journal (Refereed) Published
Utilizing a-bromo-g-butyrolactone (aBrgBL) as a comonomer with 3-caprolactone (3CL) or L-lactide (LLA)produces copolymers with active and available grafting sites, e.g., for SET-LRP, where the choice of thegrafting monomers is limited only by one's imagination. This was deduced by utilizing a wide range ofdifferent acrylates of varying polarities and was realized with the aid of a fluorinated alcohol, 2,2,2-trifluoroethanol, which acts as a universal solvent for both the hydrophobic macroinitiators and thegrafting monomers. Using aBrgBL successfully provides a simple route to merge the two polymerizationmethodologies, ROP and SET-LRP. aBrgBL inherently meets all of the prerequisites to act as a platformmonomer for the synthesis of functional aliphatic polyesters, i.e., it is inexpensive, available, and able toform isolated grafting sites along the polymer chain. The copolymerization of aBrgBL together with twoof the most commonly used cyclic ester monomers, 3-CL and LLA, proceeds with a high degree ofcontrol and a linear relationship between the feed ratio of aBrgBL and its composition in the copolymer.The formation of isolated units of aBrgBL in the copolymer is visualized by the reactivity ratios of thecopolymerization reactions and confirmed by 13C-NMR spectroscopy. The incorporation of isolatedaBrgBL is the feature that makes this class of copolymers unique, and it can be considered to provide aroute to the “perfect graft copolymer” with a degradable backbone.
Place, publisher, year, edition, pages
Royal Society of Chemistry, 2014. Vol. 5, no 12, 3847-3854 p.
Research subject Fibre and Polymer Science
IdentifiersURN: urn:nbn:se:kth:diva-145189DOI: 10.1039/C4PY00148FISI: 000336804800015ScopusID: 2-s2.0-84901352273OAI: oai:DiVA.org:kth-145189DiVA: diva2:717131
QC 201406272014-05-142014-05-142015-05-22Bibliographically approved