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Diffusion and Reaction Phenomena in Solution‐Based Healing of Polymer Coatings Using the Diels–Alder Reaction
Author(s) -
Pratama Purnomo A.,
Peterson Amy M.,
Palmese Giuseppe R.
Publication year - 2012
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.201100407
Subject(s) - maleimide , furan , materials science , corrosion , covalent bond , epoxy , polymer , coating , composite material , polymer chemistry , diels–alder reaction , chemical engineering , chemistry , catalysis , organic chemistry , engineering
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.