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7274657 
Journal Article 
Performance of Soft Segment Self-healing Polyurethane Coating of Polyethylene Glycol(PEG) 
Lyu, Zk; Zhang, Y; Fan, Wj; Liu, Hx 
2020 
17 
2 
25 
Chinese 
The paper aims to design and prepare a special molecular structure of new type polyurethane, apply its memory performance to self-healing of coating, and evaluate the performance of the new self-healing coating more rigorously and scientifically, compared with that of similar commercial coating. With hydroxyl methyl butyric acid and dimethyl formamide as chain extenders, with polyethylene glycol(peg) as the molecular soft segments, and with isophorone diisocyanate as hard segment, waterborne polyurethane was obtained by solution polymerization. The control group was set and coated with different polyurethane coatings in the accelerated corrosion test. Stered microscope test, Fourier transform infrared spectroscopy, thermogravimetric analysis, electrochemical workstation were adopted to test surface morphology, chemical structure, thermal resistance, polarization and ac impedance performance and other parameters of polyurethane. Under the same condition of scratch processing, the performance of self-healing polyurethane prepared was better than that of the polyurethane organic coating materials on the market. Polyurethane of shape memory has good self-healing performance. It can be used to repair forming matters of self-healing coatings. 
Machinery; Cognitive ability; Butyric acid; Performance evaluation; Morphology; Polymerization; Thermogravimetric analysis; Molecular structure; Polyurethane; Protective coatings; Thermal resistance; Infrared analysis; Accelerated tests; Workstations; Polyethylene; Shape memory; Fourier transforms; Self healing materials; Corrosion tests; Polyethylene glycol; Polyurethane resins; Infrared spectroscopy; Organic coatings; Electrochemistry; Coatings; Solution polymerization; Diisocyanates; Dimethyl formamide