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Non‐Delaminating Polymer Hydrogel Coatings via C,H‐Insertion Crosslinking (CHic)—A Case Study of Poly(oxanorbornenes)
Author(s) -
Riga Esther K.,
Rühe Jürgen,
Lienkamp Karen
Publication year - 2018
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201800397
Subject(s) - self healing hydrogels , polymer chemistry , materials science , polymer , monomer , copolymer , benzophenone , methacrylamide , chemical engineering , composite material , acrylamide , engineering
Robust, non‐delaminating polymer coatings and hydrogels are needed for technical and biomedical applications. This study focuses on surface‐attached poly(oxanorbornene) hydrogels obtained by simultaneous UV‐activated crosslinking and surface‐immobilization. The synthesis and copolymerization of two oxanorbornene monomers carrying the UV‐crosslinkers malonic acid diazoester or benzophenone, which can both undergo UV‐triggered C,H‐insertion crosslinking (CHic), is presented. The crosslinking efficiency and network stability of hydrogels made from these self‐crosslinkable polymers are studied and compared to the properties of poly(oxanorbornene) networks obtained by UV‐triggered thiol‐ene‐reactions involving a low molecular weight crosslinker. Smooth, defect‐free, non‐delaminating hydrogel coatings are obtained by CHic, not only on laboratory model surfaces but also on a technical product.