期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 30, 期 12, 页码 1009-1014出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200900031
关键词
anionic polymerization; core-shell polymers; polymer grafting; ring-opening polymerization
资金
- Australian Research Council [LX0560296]
- Australian Research Council [LX0560296] Funding Source: Australian Research Council
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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