Facile access to hydroxy-functional core-shell microspheres via grafting of ethylene oxide by anionic ring-opening polymerization
Joso, Raymond, Reinicke, Stefan, Walther, Andreas, Schmalz, Holger, Mueller, Axel H.E., & Barner, Leonie (2009) Facile access to hydroxy-functional core-shell microspheres via grafting of ethylene oxide by anionic ring-opening polymerization. Macromolecular Rapid Communications, 30(12), pp. 1009-1014.
We present a facile access route to hydroxy-functional narrow disperse microspheres of well-defined grafting density (GD). Ethylene oxide has been grafted from highly crosslinked poly(divinyl benzene) microspheres by anionic ring-opening polymerization using sec-butyllithium as activator together with the phosphazene base t-BuP4. Initially, core microspheres have been prepared by precipitation polymerization utilizing divinyl benzene (DVB, 80 wt.-%). The grafting of poly(ethylene oxide) (PEO) from the surface resulted in the formation of functional core-shell microspheres with hydroxy-terminal end groups. The number average particle diameter of the grafted microspheres was 3.6 mu m and the particle weight increased by 5.7%. The microspheres were characterized by SEM, FT-IR spectroscopy, elemental analysis, and fluorescence microscopy. The surface GD (determined via two methods) was 1.65 +/- 0.06 and 2.09 +/- 0.08 chains.nm-2, respectively.
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|Item Type:||Journal Article|
|Keywords:||anionic polymerization; core-shell polymers; polymer grafting; ring-opening polymerization|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||28 Jul 2016 22:50|
|Last Modified:||05 Aug 2016 01:25|
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