Journal
MACROMOLECULES
Volume 41, Issue 17, Pages 6413-6418Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma8009678
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Funding
- KOSEF [R11-2007-050-04001-0]
- National Science Foundation
- UCSB Materials Research Laboratory [DMR 05-20415]
- PREM DMR [DMR 06-11539, NIRT 05-06309]
- Netherlands Organization for Scientific Research
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [0915334] Funding Source: National Science Foundation
- National Research Foundation of Korea [R11-2007-050-04001-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Novel polymeric nanoparticles were prepared through the chain collapse of linear polymers driven by noncovalent cross-linking of dendritic self-complementary hydrogen-bonding units (SHB). Random copolymers containing SHB units, poly[(methyl methacrylate)-r-2-((3,5-bis(4-carbamoyl-3-(trifluoromethyl)phenoxy)beilzyloxy)carbonylainino)ethyl metbacrylate] (A1, A2), were synthesized with various incorporation ratios by reversible addition-fragmentation chain transfer (RAFT) polymerization. Dramatically different behavior was observed depending on the level of incorporation of the supramolecular units. At high loadings of A2 (6% SHB incorporation), intramolecular chain collapse is favored, resulting in the formation of well-defined polymer nanoparticles, which were characterized by scanning force microscopy (SFM), dynamic light scattering (DLS), and viscosity studies. In contrast, analysis of copolymer A1 (1 % SHB incorporation) revealed that chain collapse occurred primarily through intermolecular interactions leading to large aggregates.
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