Synthesis and Thiol-Ene Photopolymerization of Allyl Ether Functionalized Dendrimers
2008 (English)In: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 46, no 4, 1339-1348 p.Article in journal (Refereed) Published
Well-defined, allyl-ether functional, first-generation dendrimers have been synthesized. The convergent growth approach was utilized, using the anhydride of the allyl-ether terminated building block. Three different core moieties were used: trimethylolpropane, trisphenol, and ditrimethylolpropane. The coupling reactions proceeded in good yields and all compounds were characterized by NMR, MALDI-TOF, and SEC. The allyl-terminated dendrimers were crosslinked by thiol-ene chemistry, using a multifunctional thiol, TriThiol, to give clear and smooth films. The photopolymerization was conducted in the presence of a photoinitiator, Irgacure 651, and no traces of either allyl-ether groups or thiols were observed by FT-Raman after cure. All crosslinked films were characterized with respect to mechanical (DMA) and thermal (DSC) properties. It was found that homogeneous networks were formed and that the core functionality and structure had little effect on the network properties.
Place, publisher, year, edition, pages
2008. Vol. 46, no 4, 1339-1348 p.
crosslinking, dendritic allyl-ether, thermosets, thiol-ene photopolymerization, viscoelastic properties
IdentifiersURN: urn:nbn:se:kth:diva-9757DOI: 10.1002/pola.22474ISI: 000253221300017ScopusID: 2-s2.0-38849124254OAI: oai:DiVA.org:kth-9757DiVA: diva2:127757
QC 201008312008-12-102008-12-102012-03-21Bibliographically approved