期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 35, 期 2, 页码 174-179出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201300642
关键词
block copolymers; core-shell structure; photo cross-linking; reversible addition-fragmentation chain transfer (RAFT)
资金
- National Science Foundation [DMR-0846792]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1265388] Funding Source: National Science Foundation
Polymeric nanoparticles are prepared by selectively cross-linking a photo-sensitive dimethylmaleimide-containing block of a diblock copolymer via UV irradiation. A well-defined photo-cross-linkable block copolymer is prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization of a dimethylmaleimide-functional acrylamido monomer containing photoreactive pendant groups with a poly(N,N-dimethylacrylamide) (PDMA) macro-chain transfer agent. The resulting amphiphilic block copolymers form micelles in water with a hydrophilic PDMA shell and a hydrophobic photo-cross-linkable dimethylmaleimide-containing core. UV irradiation results in photodimerization of the dimethylmaleimide groups within the micelle cores to yield core-cross-linked aggregates. Alternatively, UV irradiation of homogeneous solutions of the block copolymer in a non-selective solvent leads to in situ nanoparticle formation.
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