Liu, Yang; Zhang, Zetian; Fan, Weiwei; Yang, Kaifeng; Li, Zhengjun published the artcile< Preparation of renewable gallic acid-based self-healing waterborne polyurethane with dynamic phenol-carbamate network: toward superior mechanical properties and shape memory function>, Computed Properties of 112-63-0, the main research area is isophorone diisocyanate gallic acid trimethylolpropane polyurethane mech property morphol.
Endowing thermoset self-healing polymers with excellent mech. properties and shape memory function by utilizing bio-based monomers is highly desirable for the development of the next-generation smart materials. To achieve this goal, herein, we developed a novel thermally induced self-healing system with robust mech. properties and shape memory function by incorporating dynamic phenol-carbamate bond formed by the polymerization reaction of the renewable gallic acid (GA) and isocyanate into waterborne polyurethane (GA-WPU) with excellent emulsion stability. Significantly, a good balance can be achieved between desirable self-healing ability (healing efficiency 81.1%) and robust mech. properties (tensile strength 45.1 MPa and elongation at break 576.5%) by adjusting dynamic phenol-carbamate bonds incorporated into the polymer networks, and compared with the reported self-healing polymers, the recovered tensile strength of our target polymer shows an overwhelming superiority. Furthermore, taking the advantage of the crystalline PBA (switching segment) and phenol-carbamate crosslinkages, the prepared GA-WPU polymer can rapidly recover from temporary shape to original shape by thermal energy (less than 30 s, and the shape fixity and recovery ratio remain above 91.5%). We envision that this elaborate strategy is instructive for designing mech. robust polymeric materials with self-healing, shape memory function and environmentally friendly characteristics.
Journal of Materials Science published new progress about Activation energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics