The Study of Self-healing Polyurethane

• Main Authors: HSIEH, YAO-WEI, 謝耀葳
• Other Authors: RWEI, SYANG-PENG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/f63ppp

碩士 === 國立臺北科技大學 === 分子科學與工程系有機高分子碩士班 === 107 === In this study, the diphenylmethane diisocyanate was reacted with polycarbonate diol, glycerol to form a polyurethane prepolymer, and then reacted with furfurylamine (FA) to form a furan-terminal group prepolymer (PU-furan). Finally, the Diels-Alder reaction was performed with bismaleimide (BMI) to obtain a targeted self-healing polyurethane (PU-DA). The self-healing polyurethane was affected by a verity of different proportion of glycerol as a cross-linking agent. The chemical structure was identified by FT-IR and 1H NMR. Thermal analysis was measured via DSC and TGA. The self-healing characteristics were observed through an optical microscope and tensile test. The new self-healing polyurethane has excellent thermal stability and mechanical properties, indicating the degradation temperature, stress and elongation at break could be observed around 250 ℃, 46.3 MPa, and 526.1%, respectively. Furthermore, the self-healing property could be driven at 130℃for 30 minutes with an effective recovery rate of 70%. This the newly synthesized self-healing polyurethane could be applied in a fabric of washing and smashing resistance property via the loop reaction, which could be extended to utilize in the automotive industry, electronic product, coating applications.