The DOI matches its Crossref record; 6 of the 6 references it cites were found in a registry or an index.
Shell-Cross-Linked Vesicles Synthesized from Block Copolymers of Poly(d,l-lactide) and Poly(N-isopropyl acrylamide) as Thermoresponsive Nanocontainers
Abstract
A polylactide (D,L-PLA) macroRAFT agent was prepared by utilizing a hydroxyl-functional trithiocarbonate as a coinitiator for the ring-opening polymerization. The length of the resultant polymer was controlled by the concentration of the coinitiator leading to the formation of two PLA polymers with M(n) = 12500 g mol(-)(1) (PDI = 1.46) and M(n) = 20500 g mol(-)(1) (PDI = 1.38) each with omega-trithiocarbonate functionality. Chain extension of PLA via the RAFT (free radical) polymerization of N-isopropyl acrylamide (NIPAAm) resulted in the formation of amphiphilic block copolymers with the PNIPAAm block increasing in size with conversion. TEM measurements of the aggregates obtained by self-organization of the block copolymers in aqueous solutions indicated the formation of vesicles. The sizes of these aggregates were influenced by the ratio of both blocks and the molecular weight of each block. The lower critical solution temperature (LCST) of the block copolymer was largely unaffected by the size of each block. UV turbidity measurements indicated a higher LCST for the block copolymers than for the corresponding PNIPAAm homopolymers. Stabilization of the vesicles was attained by a cross-linking chain extension of the PNIPAAm block using hexamethylene diacrylate. As the trithiocarbonate group was located between the PLA and PNIPAAm blocks, the chain extension resulted in a cross-linked layer between the core and corona of the vesicles.
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Citations
Cites
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Living Radical Polymerization by the RAFT Process
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Bioapplications of RAFT Polymerization
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Self-citationSelf-healing gels based on constitutional dynamic chemistry and their potential applications
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Core cross-linked star polymers via controlled radical polymerisation
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Metadata
- Authors
- Hales, M., Barner-Kowollik, C., Davis, T. P., & Stenzel, M. H.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-11-03
- Volume
- 20
- Issue
- 25
- Pages
- 10809-10817
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W1988129390
- Cited by
- 205
- References
- 6
- FWCI
- 7.84
- Type
- journal article
- Language
- en
- Open access
- closed
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