Self-healing of biobased furan polymers: Recovery of high mechanical strength by mild heating
Self-healing of biobased furan polymers: Recovery of high mechanical strength by mild heating
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DOI：
10.1016/j.polymdegradstab.2019.01.007
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发表时间：
2019-03
影响因子：
5.9
通讯作者：
N. Yoshie;Shoma Yoshida;K. Matsuoka
中科院分区：
文献类型：
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作者：
N. Yoshie;Shoma Yoshida;K. Matsuoka
开发了通过温和加热显示高机械强度恢复的生物基自修复聚合物。以呋喃共聚物（聚（2，5-呋喃二亚甲基琥珀酸酯-co-丙二醇琥珀酸酯））为原料，通过可逆Diels-Alder反应与双马来酰亚胺反应，制备了一系列生物基网络聚合物。通过改变共聚物的共聚单体组成和添加到共聚物中的双马来酰亚胺的量，获得了具有各种玻璃化转变温度Tg的网络聚合物，Tg范围为-19至37 °C。这些网络聚合物在室温下的愈合测试。和50 °C时，愈合能力与Tg之间存在明显的关系：愈合所需的愈合温度Th>Tg+15 °C。此外，具有r.t <Tg< 50 °C的网络聚合物表现出在50 °C下11-18 MPa的相当高的拉伸强度的恢复。这一结果表明，设置Tg略高于r.t. Tg +15 °C以上应是在温和的愈合条件和高机械强度恢复之间获得良好平衡的良好策略。
Bio-based self-healing polymers exhibiting recovery of high mechanical strength by mild heating are developed. A series of bio-based network polymers was prepared from furan copolymers, poly(2,5-furandimethylene succinate-co-propylene succinate)s, through the reversible Diels-Alder reaction with bismaleimide. By changing the comonomer composition of the copolymer and the amount of bismaleimide added to the copolymer, the network polymers with various glass transition temperature,Tg, covering from −19 to 37 °C were obtained. Healing test of these network polymers at r.t. and 50 °C revealed a clear relationship between healing ability andTg: healing required a healing temperatureTh>Tg+15 °C. Furthermore, the network polymers with r.t <Tg< 50 °C expressed recovery of quite high tensile strength of 11–18 MPa at 50 °C. This result indicates that settingTgslightly above r.t. andThaboveTg+15 °C shoud be a good strategy to obtain a good balance between mild healing conditions and recovery of high mechanical strength.