期刊
POLYMER
卷 50, 期 10, 页码 2204-2208出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.03.013
关键词
Core cross-linked (CCL) micelle; Photo-cross-linking; Bifunctional photo-cross-linking agent
资金
- Korea Science and Engineering Foundation
- Korean government (MEST) [RII-2005-065]
- Korea Institute of Industrial Technology(KITECH) [10032023] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2008-0057395] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A new method for preparing polymeric, core cross-linked (CCL) micelles has been developed using a bifunctional photo-cross-linking agent of di(4-hydroxyl benzophenone) dodecanedioate (BPD). An amphiphilic diblock copolymer of poly(ethylene glycol)-b-poly(2-hydroxyethyl methacrylate-co-methyl methacrylate) (PEG-b-P(HEMA-co-MMA)) was synthesized via atom-transfer radical polymerization (ATRP) using a PEG macroinitiator at 85 degrees C. The core domains of the PEG-b-P(HEMA-co-MMA) micelles containing BPD in aqueous solution were successfully photo-cross-linked by UV irradiation for only 30 min. The HEMA units incorporated in the hydrophobic block of PEG-b-P(HEMA-co-MMA) donated labile hydrogens to excited-state BP groups in BPD, and they were subsequently cross-linked by BPD through radical-radical combination. A sufficient degree of cross-linking was obtained at an equivalent ratio of the BP groups to the HEMA units. (C) 2009 Elsevier Ltd. All rights reserved.
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