Abstract This work reports on the development of a novel polymer blend with thermally triggered shape memory and self-healing properties. Blends were prepared by mixing a self-healing ionomer (Surlyn 9520) and polycyclooctene (with and without crosslinking agent) in different ratios. The regions of thermal activation were determined by thermogravimetric analysis, differential scanning calorimetry and oscillatory shear rheology. Consecutively, the shape memory and self-healing behaviour were investigated by a torsion procedure and tensile testing respectively. It was found that ionomer/crosslinked polycyclooctene blends of 70/30 wt% lead to polymers showing partial macroscopic healing and repeatable shape memory characteristics. The new polymer system shows both dual and triple shape memory behaviour and a near to 100% stiffness recovery after healing of crosscuts at standard ionomer healing conditions. Furthermore, the relation between terminal relaxation and self-healing in blends is shown. This study introduces a triple shape memory polymer with self-healing properties by a blending strategy thereby clearing the path for more durable materials based on shape memory properties.

中文翻译：

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共混比对离聚物-聚环辛烯交联聚合物共混物形状记忆和自修复行为的影响

摘要 这项工作报告了具有热触发形状记忆和自修复特性的新型聚合物共混物的开发。通过以不同比例混合自修复离聚物 (Surlyn 9520) 和聚环辛烯（含和不含交联剂）制备共混物。热活化区域通过热重分析、差示扫描量热法和振荡剪切流变学确定。连续地，分别通过扭转程序和拉伸试验研究了形状记忆和自修复行为。发现 70/30 wt% 的离聚物/交联聚环辛烯共混物导致聚合物显示出部分宏观愈合和可重复的形状记忆特性。在标准离聚物愈合条件下，横切面愈合后，新的聚合物系统显示出双重和三重形状记忆行为以及接近 100% 的刚度恢复。此外，还显示了混合物中终端松弛和自愈之间的关系。这项研究通过混合策略引入了具有自修复特性的三重形状记忆聚合物，从而为基于形状记忆特性的更耐用材料扫清了道路。