Design and Synthesis a Self-Healing Polymeric Coating Formed through Diels-Alder Reaction between Bismaleimide and Furan-Modified Polyethyleneglycol

Self-healing material is a new generation of smart polymers which has the ability to repairdamage and small cracks by itself and recover mechanical properties upon the external stimulus[1]. These materials lead to increased useful life, a durability of structures, reducesmaintenance costs, restore their structure and prevents waste of materials. Self-healing basedon heat is performed in the reversibility of reactions and bonds through the Diels-Alder (DA)reaction as an external stimulus [2]. The DA reaction has been widely used as one of the mostwell-known chemical reactions for designing self-healing polymers, which belongs to thefamily of click chemistry defined by high selectivity, high efficiency without byproducts[3]. In this study, poly (ethylene glycol) polymer was chosen as the alcoholic polymer thatplays an important role for the enhancement of self-healing property. The flexible polymerchains of poly (ethylene glycol) (PEG) are functionalized by the derivatives of diene anddienophile in order to carry out the Diels-Alder reaction. The Diels-Alder product shows goodthermal and mechanical properties due to the use of hydroxyl matrices. The self–healingproperty of the synthesized compound evaluated and observed at different times and temperaturesby the use of an optical microscope. Identification of products is done by using techniquessuch as FT-IR, 1H, 13C NMR, TGA-DSC and melting point.