| abstract |
The invention relates to a thermoplastic polyurethane elastomer containing a cyano group in the soft segment and a preparation method thereof. The hydroxyl-terminated polybutadiene acrylonitrile, polyester macromolecular diol and/or polyether macromolecular diol, organic diisocyanate and small molecule dibasic alcohol for polymerization reaction, the obtained product is the thermoplastic polyurethane elastomer body containing cyano group in the soft segment; The functional group cross-linking agent and the cross-linking catalyst are blended, and a cross-linking reaction is carried out to obtain the thermoplastic polyurethane elastomer. The invention can conveniently adjust the material properties by simply adjusting the dosage of the cross-linking agent. The cross-linked thermoplastic polyurethane elastomer has excellent mechanical properties and low compression set, and can better adapt to high-pressure seals, automobiles, etc. Shock absorbing pads and other parts requiring high mechanical strength and low compression set. |