【摘要】 采用丁二酮肟（DMG）、异佛尔酮二异氰酸酯（IPDI）、聚四氢呋喃二醇（PTMG）合成了线性室温自愈合的聚肟氨酯（DOU-PU）,接着将不同的金属离子(Cu²⁺和Zn²⁺)分别引入DOU-PU分子链中，得到含有不同金属配位键的Cu-DOU-PU、Zn-DOU-PU弹性体，探究金属离子对弹性体力学性能及自愈合性能的影响。结果表明：DOU-PU的拉伸强度达到7.3 MPa,室温自愈合16 h的拉伸强度恢复率达到82.2%,Cu-DOU-PU和Zn-DOU-PU弹性体的拉伸强度分别是DOU-PU的1.73和2.64倍，室温自愈合16 h自愈合率分别在64.6%和65.8%。金属配位键的存在提高了弹性体的玻璃化转变温度，降低了热分解温度。更多还原

【Abstract】 A room-temperature self-healing polyurethane elastomer（DOU-PU） with linear structure was synthesized using dimethylglyoxime（DMG）, isophorone diisocyanate（IPDI） and poly（tetramethylene ether） glycol（PTMEG）. Then different metal ions(Cu²⁺ and Zn²⁺) were introduced into the DOU-PU molecular chain respectively, Cu-DOU-PU and Zn-DOU-PU elastomers with different metal coordination bonds were obtained, and the effects of metal ions on the mechanical properties and self-healing properties of the elastomers were studied. The results showed that the tensile strength of DOU-PU reached 7.3 MPa, the self-healing rate in room-temperature 16 h reached 82.2%. The tensile strength of Cu-DOU-PU and Zn-DOU-PU elastomers was 1.73 and 2.64 times that of DOU-PU, and the self-healing rate was 64.6% and 65.8%, respectively. The presence of metal coordination bonds elevated the glass transition temperature and reduced the thermal decomposition temperature.更多还原