一种自修复聚氨酯的制备及表征  

Preparation and characterization of a self-healing polyurethane

作　　者：王建辉 赵悦菊[1,2] 郑永立 石金彪[1,2] 滕济林 WANG Jian-hui;ZHAO Yue-ju;ZHENG Yong-li;SHI Jin-biao;TENG Ji-lin(Nanri Group(State Grid Electric Power Research Institute)Corporation,Nanjing 211106,China;Beijing Guodian Futong Science and Technology Development Co.,Ltd.,Beijing 100070,China)

机构地区：[1]南瑞集团(国网电力科学研究院)有限公司,江苏南京211106 [2]北京国电富通科技发展有限责任公司,北京100070

出　　处：《热固性树脂》2021年第1期23-26,共4页Thermosetting Resin

基　　金：北京国电富通科技发展有限责任公司科技项目(FTZY201805,FTZY201902)。

摘　　要：采用两种高柔性聚醚多元醇PPG1000和PPG2000,通过脂环族二元胺(IPDA)扩链制得两种聚氨酯弹性体:聚氨酯-PPG1000和聚氨酯-PPG2000,并通过示差扫描量热分析、动态热力学分析、凝胶渗透色谱及拉伸性能测试对其结构和性能进行了研究。结果表明:合成的两种聚氨酯弹性体的分子质量约为9万,聚氨酯-PPG1000的玻璃化转变温度为-31℃,聚氨酯-PPG2000为-53℃。它们在室温下均具有较好的弹性,两种聚合物在40℃下愈合3 h即可完成自修复,室温下24 h同样可以达到良好的自愈合效果。聚氨酯-PPG2000的修复效率远高于聚氨酯-PPG1000,这与材料中软段含量有直接关系。该成果有望在户外防护领域得到应用。The two polyurethane elastomers of Polyurethane-PPG1000 and Polyurethane-PPG2000 were prepared using two highly flexible polyether polyols PPG1000 and PPG2000 by alicyclic diamine(IPDA)chain extension.The structure and performance of two products were investiged by differential scanning calorimetry analysis,dynamic thermodynamic analysis,gel permeation chromatography and tensile property tests.The results showed that the molecular weights of the two synthesized polyurethane elastomers were about90000.The glass transition temperature of Polyurethane-PPG1000 was-31℃,and that of polyurethane-PPG2000 was-53℃.They both had good elasticity at room temperature.The two polymers could complete self-healing after 3 hours of healing at 40℃,and they could also achieve good self-healing effects at room temperature for 24 h.The repair efficiency of Polyurethane-PPG2000 was much higher than that of Polyurethane-PPG1000,which was directly related to the content of soft segments in the material.The results were expected to be applied in the field of outdoor protection.

关 键 词：自修复 聚氨酯弹性体 聚醚多元醇 脂环族二元胺 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]