| BA Miao,WANG Xian-wei,FAN Fang-xin,WANG Yu-feng,ZHANG Zhan-ping,GAO Qiang.Synthesis and Properties of UV Curable Polyurethane Self-healing Coating[J],48(9):280-286 |
| Synthesis and Properties of UV Curable Polyurethane Self-healing Coating |
| Received:January 03, 2019 Revised:September 20, 2019 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2019.09.033 |
| KeyWord:acrylate polyurethane modified self-healing hard segment content coating |
| Author | Institution |
| BA Miao |
1.School of Chemistry and Materials Engineering, Changshu Institute of Technology, Suzhou , China; 2.Key Laboratory of Ship-machinery Maintenance & Manufacture, Dalian Maritime University, Dalian , China |
| WANG Xian-wei |
3.Nantong Baina Digital New Materials Co., Ltd, Nantong , China |
| FAN Fang-xin |
1.School of Chemistry and Materials Engineering, Changshu Institute of Technology, Suzhou , China |
| WANG Yu-feng |
1.School of Chemistry and Materials Engineering, Changshu Institute of Technology, Suzhou , China |
| ZHANG Zhan-ping |
2.Key Laboratory of Ship-machinery Maintenance & Manufacture, Dalian Maritime University, Dalian , China |
| GAO Qiang |
2.Key Laboratory of Ship-machinery Maintenance & Manufacture, Dalian Maritime University, Dalian , China |
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| Abstract: |
| The work aims to prepare a UV curable polyurethane self-healing coating and study its self-healing properties. The UV curable acrylate modified polyurethane (APU) coatings were synthesized by two-stage method with 2,4-toluene diisocyanate (TDI), poly-propylene glycol (PPG), trihydroxy polyether polyol (HSH330), hydroxyethyl methacrylate (HEMA) and 1,4-butanediol (BDO) as raw materials. The chemical structure of the coating was characterized by Fourier Transform Infrared Spectrometer, the surface-interface property was analyzed by Laser Confocal Microscopy and the mechanical properties, self-healing properties and film forming properties were tested by Tension Testing. The FTIR curve results indicated that APU coating was synthesized with the bending vibration peak of —C=C— at 810 cm–1 from HEMA, while the coating still exhibited the obvious chemical structure characteristic of polyurethane. With the addition of HEMA, the hard segment content increased from 20% to 40%, the water-absorption rate of APU coating decreased from 36.8% to 3.1%, and the elastic modulus increased from 0.29 MPa to 8.69 MPa. The self-healing rates of APU coatings decreased due to the incorporation of HEMA. When the hard segment content of APU coating exceeded 45%, the coating lost self-healing property. The synthetic APU coatings have the good water-resistance and compactness. The addition of HEMA limits the molecular chain motion and the hydrogen bonding of soft segment, thus weakening the self-healing property of APU coating. |
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