Re-produced and moisture-sensitive covalent adaptable networks based on non-isocyanate polyurethanes. (17th April 2023)

• Record Type: Journal Article
• Authors: Ding, Yutong; Xu, Weikun; Kuang, Tairong; Wen, Qiang; Cheng, Chao; Chen, Feng
• Is Part Of: Polymer. Volume 272(2023)
• Publication Date: 2023-04-17
• Subjects: Covalent adaptable networks -- Non-isocyanate polyurethane -- Boronic ester -- Re-production -- Moisture-sensitive adhesion; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2023.125845
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: Polymer-based covalent adaptable networks (CANs) presented many unique mechanical and viscoelastic properties. Under external stimulation, CANs can be broken and reproduced which gives polymers dynamic properties such as re-shaping, re-processing, and self-healing. However, polymers-based CANs usually have insufficient mechanical properties and complex chemical compositions. Non-isocyanate polyurethane (NIPU) as a green and environmental-benign polymer can be a suitable candidate for the construction of dynamic cross-linking networks. In this paper, CANs was simply synthesized by using boronic ester unit and NIPU hydroxy-containing framework. Owning to its sensitive borate bond stimulated by both temperature and moisture, as-synthesized NIPU CANs exhibited excellent mechanical strength cyclic production, and moisture-sensitive adhesion property. Graphical abstract: Image 1 Highlights: Synthesis of non-isocyanate polyurethane with CANs. Self-healing and re-production of thermoset elastomers. Moisture sensitive adhesives with adjustable adhesion.