Epoxy resin (EP) as common polymers have attracted much attention in the field of shape memory materials due to their excellent properties. However, epoxy-based shape memory polymers suffer from a trade-off between strength, toughness, variable stiffness capability and shape memory properties, and thus are subject to significant limitations in their applications. In this paper, we propose a method to prepare epoxy composites with high strength and toughness and high shape memory properties by introducing a lot of hydrogen bonds. Hydrogen bonding is generated through polycaprolactone (PCL) induced EP phase separation. A low melting point alloy (L) was also added to enhance the shape memory properties of the composites. The synthesis mechanism of EP and the formation mechanism of hydrogen bonding were revealed. The effects of the introduction of hydrogen bonding on the mechanical properties, stiffness and shape memory properties of the composites were investigated. New ideas and design directions are provided for the optimisation of modification of high-performance shape memory epoxy resins.

中文翻译：

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高强度、高韧性的高性能形状记忆环氧树脂：通过聚己内酯和低熔点合金引入氢键制备而成

环氧树脂（EP）作为常见的聚合物，由于其优异的性能在形状记忆材料领域备受关注。然而，环氧基形状记忆聚合物在强度、韧性、可变刚度能力和形状记忆性能之间存在权衡问题，因此在其应用中受到显着限制。在本文中，我们提出了一种通过引入大量氢键来制备具有高强度和韧性以及高形状记忆性能的环氧复合材料的方法。氢键是通过聚己内酯 (PCL) 诱导的 EP 相分离产生的。还添加了低熔点合金（L）以增强复合材料的形状记忆性能。揭示了EP的合成机理和氢键的形成机理。研究了氢键的引入对复合材料力学性能、刚度和形状记忆性能的影响。为高性能形状记忆环氧树脂的改性优化提供新的思路和设计方向。