Home > Publications database > pH and Temperature Dependence of Low‐Core $T_g$ Micellar Structures Formed by PDMAEMA ‐ b ‐ PLMA Diblock Copolymers in Aqueous Solution > print

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024 7 _ |a 10.1002/pol.20241120
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100 1 _ |a Chrysostomou, Varvara
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245 _ _ |a pH and Temperature Dependence of Low‐Core $T_g$ Micellar Structures Formed by PDMAEMA ‐ b ‐ PLMA Diblock Copolymers in Aqueous Solution
260 _ _ |a Hoboken, NJ
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520 _ _ |a A diblock copolymer featuring a hydrophobic block with a low glass transition temperature and a pH-responsive, cationic block is synthesized and investigated with respect to its self-assembly behavior in aqueous solution. The synthesis of the poly(lauryl methacrylate)-block-poly(2-(N,N-dimethylamino) ethyl methacrylate) diblock copolymer PDMAEMA$_{60}$-b-PLMA$_{40}$ is carried out using reversible addition fragmentation chain transfer (RAFT) polymerization. Its self-assembly in dilute aqueous solution at pH 7 is investigated using various light scattering methods. Micelles with a positive zeta potential are identified. Synchrotron small-angle X-ray scattering reveals changes in the inner structure of the micelles as a function of temperature and at pH values above, below and close to the pKa value of PDMAEMA (ca. 7.5). At all pH values, cigar-shaped core–shell micelles are found. While the micellar size and shape hardly change with temperature at pH 5, temperature responsivity is observed at pH 7 and 10, resulting in, among others, a change of the core size. These structural changes are facilitated by the softness of the PLMA core. Such systems may be suitable for the co-delivery of hydrophobic drugs and nucleic acids.
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700 1 _ |a Da Vela, Stefano
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700 1 _ |a Pispas, Stergios
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700 1 _ |a Papadakis, Christine M.
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773 _ _ |a 10.1002/pol.20241120
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856 4 _ |u https://onlinelibrary.wiley.com/doi/full/10.1002/pol.20241120
856 4 _ |u https://bib-pubdb1.desy.de/record/626388/files/pH%20and%20Temperature%20Dependence%20of%20Low%20Core%20T%20g%20Micellar%20Structures%20Formed%20by%20PDMAEMA%20%20b%20%20PLMA%20Diblock%20Copolymers%20in%20Aqueous%20Solution.pdf
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