Effectively improving the mechanical properties and thermal resistance of epoxy shape‐memory polymers (ESMPs) without affecting their shape‐memory performance is necessary to expand these polymers in practical applications. In this article, modified multi‐walled carbon nanotubes (MWCNTs) were prepared and used as efficient reinforcement for enhancing the comprehensive properties of ESMPs. Increases of nearly 289% to 444% for impact strength and 112% to 184% for tensile force were obtained by adding only 0.1 to 1 wt% epoxy‐modified MWCNTs. The addition of unmodified and carboxyl‐modified MWCNTs was also investigated but showed less impact on the mechanical properties of the ESMPs than epoxy‐modified MWCNTs. Thermogravimetry analysis (TGA) and dynamic mechanical analyses (DMA) showed that less than 1 wt% modified MWCNTs can enhance the heat resistance of ESMPs greatly. Although the shape recovery time for composite materials increased upon adding the MWCNTs, the entire recovery time was still less than 1 minute, and the shape recovery rate was relatively high, nearly 100%.

中文翻译：

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制备改性的多壁碳纳米管作为环氧形状记忆聚合物复合材料的增强材料

有效地提高环氧形状记忆聚合物（ESMPs）的机械性能和耐热性而不影响其形状记忆性能对于在实际应用中扩展这些聚合物是必需的。在本文中，制备了改性的多壁碳纳米管（MWCNT），并将其用作有效的增强材料，以增强ESMP的综合性能。通过仅添加0.1至1 wt％的环氧改性MWCNT，可将冲击强度提高289％至444％，将拉力提高112％至184％。还研究了未改性和羧基改性的MWCNT的添加，但是与环氧基改性的MWCNT相比，它们对ESMP的机械性能的影响较小。热重分析（TGA）和动态力学分析（DMA）表明，少于1 wt％的改性MWCNT可以大大提高ESMP的耐热性。尽管在添加MWCNT后复合材料的形状恢复时间增加了，但是整个恢复时间仍小于1分钟，并且形状恢复率相对较高，接近100％。