Abstract
The healing of a furan-functional epoxy coating using bismaleimide (BMI) solutions is demonstrated. Corrosion studies of scratched coated carbon steel show that solution healing of damaged coatings inhibits corrosion. The healing relies on (i) the diffusion of solution components into the polymer, causing the system to swell, thus bringing crack surfaces into contact, and (ii) Diels-Alder adduct formation between furan moieties of the polymer network and the maleimide, resulting in covalent bonding across the crack interface. For the system investigated, crack healing is reaction-limited for small crack widths. The results provide a guideline for the design and implementation of self-healing systems based on BMI solution encapsulation. The healing of a furan-functional epoxy thermoset coating using bismaleimide (BMI) solutions is demonstrated. Healing is influenced by Diels-Alder reaction kinetics and solution diffusion behavior. SEM images of scratched and healed coatings show that room-temperature exposure to a solution of BMI in dimethylformamide heals scratches whereas other treatments do not.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 173-181 |
| Number of pages | 9 |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 213 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 27 2012 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry