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Impact of Swelling on Macroscopic and Nanoscopic Mechanical Properties of Amphiphilic Polymer Co‐Networks in Non‐Selective and Selective Solvents

Fribiczer, Nora ; Hagmann, Kevin ; Bunk, Carolin ; Böhme, Frank ; Klitzing, Regine von ; Seiffert, Sebastian (2024)
Impact of Swelling on Macroscopic and Nanoscopic Mechanical Properties of Amphiphilic Polymer Co‐Networks in Non‐Selective and Selective Solvents.
In: Macromolecular Chemistry and Physics, 2024, 225 (6)
doi: 10.26083/tuprints-00027112
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Impact of Swelling on Macroscopic and Nanoscopic Mechanical Properties of Amphiphilic Polymer Co‐Networks in Non‐Selective and Selective Solvents
Language: English
Date: 12 June 2024
Place of Publication: Darmstadt
Year of primary publication: March 2024
Place of primary publication: Weinheim
Publisher: Wiley-VCH
Journal or Publication Title: Macromolecular Chemistry and Physics
Volume of the journal: 225
Issue Number: 6
Collation: 13 Seiten
DOI: 10.26083/tuprints-00027112
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Amphiphilic polymer gels show environmentally sensitive mechanical properties depending on the solvent polarity, which makes them useful for applications in soft contact lenses, membranes, drug delivery systems, and tissue engineering. To rationally design the material properties for such applications, a sound knowledge about the mechanical properties at different solvency states is necessary. To acquire such knowledge, amphiphilic networks are prepared by hetero‐complementary coupling of amine‐terminated tetra‐poly(ethylene glycol) (t‐PEG‐NH₂) with 2‐(4‐nitrophenyl)‐benzoxazinone terminated tetra‐poly(ε‐caprolactone) (t‐PCL‐Ox). The mechanical properties are investigated on different length‐scales and under non‐selective and selective solvent conditions using shear rheometry and atomic force microscopy (AFM). The swelling as well as the modulus in good solvent are in accord with scaling laws found for other four‐arm star‐shaped polymer networks and theoretical predictions. The swelling in selective solvent reveals a concentration‐independent volume swelling degree and a nearly linear scaling of the modulus with concentration. The surface topography probed by AFM reveals microphase‐separated structures in the range of 20 nm. Similar modulus values are obtained for bulk films in water using the complementary methods of atomic force microscopy and rheometry. The data are compared with pure hydrophilic networks to identify the effect of amphiphilicity on the material properties.

Uncontrolled Keywords: amphiphilic polymer co‐networks, atomic force microscopy, length‐scale dependent mechanics, rheology, selective solvent, swelling
Identification Number: Artikel-ID: 2300389
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-271129
Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
Divisions: 05 Department of Physics > Institute for Condensed Matter Physics
Date Deposited: 12 Jun 2024 11:53
Last Modified: 13 Jun 2024 07:32
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/27112
PPN: 519055640
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