材料工程2017，Vol.45Issue(8)：1-8,8.DOI:10.11868/j.issn.1001-4381.2016.000913
热可逆自修复聚氨酯弹性体的制备及表征
Preparation and Characterization of Thermally Reversible Self-healing Polyurethane Elastomer
摘要
Abstract
In order to investigate the structure and property relationships of intrinsic self-healing poly urethane and balance the seemly contradictory forces between its self-healing efficiency and mechanical strength,the reversible disulfide bonds were introduced into polyester-polyurethane by taking hexamethylene diisocyanate (HDI) trimers as the cross-linker and 4,4-diamino diphenyl disulfide as the chain-extender.The results show that the optimal self-healing elastomer exhibits a tensile strength of 7.7MPa and a maximum self-healing efficiency of 97.4％ at 60℃after 24 hours,whereas the common elastomer synthesized without disulfide bonds (via H-bonding interactions) only exhibits a tensile strength of 9.3MPa and a maximum self-healing efficiency of 58.0％ under the same condition,indicating that the existence of disulfide bonds helps to increase the self-healing efficiency by 67.9％.The prepared elastomer is found to have multi time self-healing capabilities and the second time self-healing efficiency is 62.3 ％.关键词
4,4-二氨基二苯二硫醚/六亚乙基二异氰酸酯三聚体/聚氨酯/本征型自修复/拉伸强度/热可逆Key words
4,4-diamino diphenyl disulfide/hexamethylene diisocyanate trimer/polyurethane/intrinsic self-healing/tensile strength/thermally reversible分类
化学化工引用本文复制引用
杨一林,卢珣,王巍巍,蒋智杰..热可逆自修复聚氨酯弹性体的制备及表征[J].材料工程,2017,45(8):1-8,8.基金项目
国家自然科学基金资助项目(51103048) （51103048）
