Synthesis and characterization of linear self-healing polyurethane based on thermally reversible Diels–Alder reaction

New linear polyurethane was synthesized viaa Diels-Alder (DA) reaction between a polyurethane prepolymer end-capped with furan groups (MPF) and bismaleimide (BMI). The structure of the linear polyurethane with DA bonds was characterized by super(1)H NMR, ATI-FTIR, TGA and AFM. The introduction of DA...

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Bibliographic Details
Published in:RSC advances 2013-01, Vol.3 (35), p.15475-15482
Main Authors: Du, Pengfei, Liu, Xuanxuan, Zheng, Zhen, Wang, Xinling, Joncheray, Thomas, Zhang, Yuefan
Format: Article
Language:English
Subjects:
Bismaleimides
Differential scanning calorimetry
Furans
Nuclear magnetic resonance
Optical microscopes
Polyurethane resins
Prepolymers
Tensile strength
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Summary:New linear polyurethane was synthesized viaa Diels-Alder (DA) reaction between a polyurethane prepolymer end-capped with furan groups (MPF) and bismaleimide (BMI). The structure of the linear polyurethane with DA bonds was characterized by super(1)H NMR, ATI-FTIR, TGA and AFM. The introduction of DA bonds enables the polyurethane thermal reversibility, which was studied thoroughly by super(1)H NMR, DSC and GPC. Besides, the new linear polyurethane with DA bonds also exhibits self-healing properties under heat treatment, which was observed by polarized optical microscope. The self-healing efficiency determined by the recovery of breaking tensile strength after being damaged and healed can reach up to 80%.
ISSN:2046-2069
2046-2069
DOI:10.1039/c3ra42278j