The addition of autonomic healing (frequently defined as self-healing) capabilities to a water-soluble polymer (polyethylene oxide, PEO) is for the first time reported. The self-healing system consists of urea-formaldehyde microcapsules filled with dicyclopentadiene and first-generation Grubbs catalyst, dispersed within polyethylene oxide. Raman spectroscopy, optical microscopy, electron microscopy, and thermogravimetric analysis were used to characterize this autonomic healing system. Self-healing capabilities were confirmed by mechanical testing (load–displacement, engineering stress–engineering strain, and true stress–true strain dependences) recorded at very slow elongation rates (0.01 mm/s). The testing fate was chosen to allow for the complete consumption of the monomer before fracture (the polymerization kinetics of PEO was estimated from Raman measurements).
Chipara, Dorina M.; Flores, Maritza; Perez, Alma; Puente, Nancy; Lozano, Karen; and Chipara, Mircea, "Adding Autonomic Healing Capabilities to Polyethylene Oxide" (2012). Mechanical Engineering Faculty Publications and Presentations. 14.
Advances in Polymer Technology