期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 29, 期 17, 页码 1431-1437出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200800244
关键词
core-shell polymers; hetero Diels-Alder (HDA) cycloaddition; polymer grafting; reversible addition fragmentation chain transfer (RAFT); ring-opening polymerization
资金
- Australian Research Council (ARC)
- Karlsruhe University (TH)/Karlsruhe Institute of Technology (KIT)
A combination of reversible addition fragmentation chain transfer (RAFT) polymerization and hetero Diels-Alder (HDA) chemistry has been utilized to successfully generate functional core-shell microspheres. Initially, precipitation polymerization in conjunction with the RAFT technique has been employed to synthesize divinylbenzene (DVB) microspheres with surface expressed RAFT groups. Subsequently, HDA cycloaddition has been performed under mild reaction conditions (50 degrees C, 24 h) with a diene-functionalized poly(epsilon-caprolactone) (PCL). While the successful grafting is immediately evident by optical inspection of the microspheres (color change from purple to white), X-ray photoelectron spectroscopy (XPS), and attenuated total reflectance spectroscopy (ATR) were additionally employed to characterize the chemical composition and surface functionalization of the microspheres. Further, confocal microscopy was used to con-firm the presence of grafted PCL chains after labeling them with rhodamine B.
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