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首页> 外文期刊>Smart Materials & Structures >Shape memory polyurethanes having crosslinks in soft and hard segments
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Shape memory polyurethanes having crosslinks in soft and hard segments

机译：在软链段和硬链段中具有交联键的形状记忆聚氨酯

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Two types of shape memory polyurethanes (PUs) with various hard segment contents (hsc) were designed and synthesized based on the position of crosslinks, either in the soft segment or in the hard segment, and were tested for tensile cyclic loading behavior as well as mechanical and dynamic mechanical properties. It was found that hard segment crosslinks gave much smaller shape fixability and much higher shape recoverability as compared with soft segment crosslinks at the same hsc. For soft segment crosslinks, shape recovery increased as the hsc decreased, and these results could possibly be interpreted in terms of dynamic mechanical properties of the PUs, which possibly were interpreted in terms of microphase separation and crosslink density.
机译：基于软链段或硬链段中的交联位置，设计并合成了两种具有不同硬链段含量（hsc）的形状记忆聚氨酯（PU），并测试了其拉伸循环载荷行为以及机械和动态机械性能。发现与在相同hsc下的软链段交联相比，硬链段交联具有小得多的形状固定性和高得多的形状恢复性。对于软链段交联，随着hsc的降低，形状恢复性增加，并且这些结果可能可以用PU的动态力学性能来解释，而力学性能可以用微相分离和交联密度来解释。

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