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- Title
Toughening Rigid Epoxy Using Novel Potassium Silanolate Ionic Interactions.
- Authors
Wu, Xiao; Yang, Xin; Zuo, Xiao‐Biao; Yu, Ran; Zhao, Xiao‐Juan; Zhang, Ying; Huang, Wei
- Abstract
A rigid and densely cross‐linked epoxy resin is successfully toughened by introducing novel potassium silanolate ionic interactions, exhibiting simultaneous improvement in toughness, strength, modulus, and glass transition temperature. The ionic interactions are incorporated through a simple way into epoxy cured with a novel potassium silanolate ionic groups‐containing amine curing agent. Small angle X‐ray scattering/wide angle X‐ray scattering and dynamic thermomechanical analysis results show that the ionic groups aggregated into multiplets and clusters in the prepared epoxy ionomers. The temporary physical cross‐link effect of ionic aggregates and the consequently formed chain‐restricting ionomeric nanodomains account for the stiffening and toughening performance. Furthermore, the densely cross‐linked epoxy ionomers possess high stretchability at elevated temperature (about 800% at 200 °C) due to the dynamic ion‐hopping effect.
- Subjects
IONIC interactions; EPOXY resins; IONOMERS; SMALL-angle scattering; GLASS transition temperature; POTASSIUM
- Publication
Macromolecular Materials & Engineering, 2020, Vol 305, Issue 2, pN.PAG
- ISSN
1438-7492
- Publication type
Article
- DOI
10.1002/mame.201900535