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首页> 外文期刊>Journal of Applied Polymer Science >Controllable shape-memory recovery regions in polymers through mechanical programming
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Controllable shape-memory recovery regions in polymers through mechanical programming

机译：通过机械编程聚合物中可控的形状记忆恢复区域

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摘要

A temperature memory effect means a shape-memory material can remember its deformation temperature. In general, a higher deformation temperature requires a higher activation temperature for shape recovery. In this work, we demonstrate that the unloading temperature can also significantly influence the shape-memory performance. A series of shape-memory tests are performed on Nafion while varying the loading and unloading temperatures. The results show that the loading temperature determines the final shape-recovery region, while the unloading temperature influences the onset recovery region. We also develop a finite-deformation viscoelastic model to investigate the above findings. The simulation results show good agreement with the experimental data, though the model predicts the recovery region occurring at a lower temperature. The model is further used to study the effects of the loading rate, unloading rate, and the holding time on the shape-memory behaviors. The results suggest that a smaller loading rate and unloading rate and a longer holding time can shift the recovery region to a higher temperature. (C) 2017 Wiley Periodicals, Inc.
机译：温度记忆效果意味着形状记忆材料可以记住其变形温度。通常，更高的变形温度需要更高的活化温度以进行形状恢复。在这项工作中，我们证明卸载温度也可以显着影响形状记忆性能。在Nafion上执行一系列形状记忆测试，同时改变装载和卸载温度。结果表明，加载温度决定了最终形状恢复区域，而卸载温度会影响发作恢复区域。我们还开发了有限变形的粘弹性模型来研究上述研究结果。仿真结果表明，与实验数据吻合良好，尽管模型预测了在较低温度下发生的恢复区域。该模型还用于研究装载速率，卸载率和保持时间对形状记忆行为的影响。结果表明，较小的装载速率和卸载率和较长的保持时间可以将恢复区域移动到更高的温度。 （c）2017 Wiley期刊，Inc。

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