Abstract
AbstractTwo samples of dendrimer‐like miktoarm star terpolymers: (poly(tert‐butyl acrylate))3‐(polystyrene‐poly(ε‐caprolactone))3 (PtBA)3‐(PS‐PCL)3, and (PS)3‐(PtBA‐poly(ethylene glycol)3 were prepared using efficient Cu catalyzed Huisgen cycloaddition (click reaction). As a first step, azido‐terminated 3‐arm star polymers PtBA and PS as core (A) were synthesized by atom transfer radical polymerization (ATRP) of tBA and St, respectively, followed by the conversion of bromide end group to azide. Secondly, PS‐PCL and PtBA‐PEG block copolymers with alkyne group at the junction as peripheral arms (B‐C) were obtained via multiple living polymerization mechanisms such as nitroxide mediated radical polymerization (NMP) of St, ring opening polymerization (ROP) of ε‐CL, ATRP of tBA. Thus obtained core and peripheral arms were linked via click reaction to give target (A)3‐(B‐C)3 dendrimer‐like miktoarm star terpolymers. (PtBA)3‐(PS‐PCL)3 and (PS)3‐(PEG‐PtBA)3 have been characterized by GPC, DSC, AFM, and SAXS measurements. (PtBA)3‐(PS‐PCL)3 did not show any self‐organization with annealing due to the miscibility of the peripheral arm segments. In contrast, the micro‐phase separation of the peripheral arm segments in (PS)3‐(PtBA‐PEG)3 resulted in self‐organized phase‐separated morphology with a long period of ∼ 13 nm. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 5916–5928, 2008
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Journal of Polymer Science Part A: Polymer Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.