Tri-Block Copolymers of Polyethylene Glycol and Hyperbranched Poly-3-ethyl-3-(hydroxymethyl)oxetane Through Cationic Ring Opening Polymerization
2009 (English)In: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 47, no 22, 6191-6200 p.Article in journal (Refereed) Published
Tri-block copolymers of linear poly(ethylene glycol) (PEG) and hyperbranched poly-3-ethyl-3-(hydroxymethyl)oxetane (poly-TMPO) are reported. The novel dumb-bell shaped polyethers were synthesized in bulk with cationic ring-opening polymerization utilizing BF3OEt2 as initiator, via drop-wise addition of the oxetane monomer. The thermal properties of the materials were successfully tuned by varying the amount of poly-TMPO attached to the PEG-chains, ranging from a melting point of 54 degrees C and a degree of crystallinity of 76% for pure PEG, to a melting point of 35 degrees C and a degree of crystallinity of 12% for the polyether copolymer having an average of 14 TMPO units per PEG chain. The materials are of relatively low polydispersity, with M-n/M-w ranging from 1.2 to 1.4. The materials have been evaluated for usage with the energetic oxidizer ammonium dinitramide.
Place, publisher, year, edition, pages
2009. Vol. 47, no 22, 6191-6200 p.
ADN, ammonium dinitramide, cationic polymerization, oxetane, polymerization, polyether, thermal properties, TMPO, multihydroxyl branched polyethers, aliphatic polyethers, polymers, 3-ethyl-3-(hydroxymethyl)oxetane, dendrimers, analog
IdentifiersURN: urn:nbn:se:kth:diva-18951DOI: 10.1002/pola.23662ISI: 000271670000025ScopusID: 2-s2.0-70350230133OAI: oai:DiVA.org:kth-18951DiVA: diva2:336998
QC 201005252010-08-052010-08-052011-01-18Bibliographically approved