Mechanical and shape memory behavior of composites with shape memory polymer
Mechanical and shape memory behavior of composites with shape memory polymer
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DOI：
10.1016/j.compositesa.2004.03.001
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发表时间：
2004-01-01
影响因子：
8.7
通讯作者：
Iwamoto, M
中科院分区：
文献类型：
--
作者：
Ohki, T;Ni, QQ;Iwamoto, M
形状记忆聚合物(SMPS)在生物医学、自修复和智能材料等领域发挥着重要作用。在众多的形状记忆材料中，形状记忆聚氨酯(PU)因其易于控制玻璃化转变温度(T)而备受关注。常温附近，即使在常温下也具有良好的形状记忆效果。为改善PUS块体的力学性能，扩大工程应用范围，研制了玻璃纤维增强PUS。制备了不同纤维质量分数的试件，研究了其力学性能和形状记忆效应。结果表明，由于增强纤维的作用，提高了材料的拉伸强度和抗机械循环载荷和热机械循环载荷的能力。结果表明，在循环加载过程中，纤维质量分数在10~20wt%之间存在一个最佳比例，以获得极低的残余应变。虽然玻璃纤维质量分数对玻璃纤维增强形状记忆PUS复合材料的形状记忆效应有一定的影响，但也证实了玻璃纤维增强形状记忆PUS复合材料保持了形状记忆效应。2004爱思唯尔有限公司版权所有。
Shape memory polymers (SMPs) are playing a prominent role for biomedical, self-repairing and smart materials. Among various SMPs, shape memory polyurethanes (PUs) are receiving much attention for their easy control of glass transition temperature (T.) around the room temperature and excellent shape memory effect even at the room temperature. In this paper, the glass fiber reinforced PUs were developed for the improvement of the mechanical weakness of PUs bulk and for wider practical engineering uses. The specimens with different fiber weight fractions were fabricated and their mechanical behavior and shape memory effect were investigated. As a result, the tensile strength and the resistance against mechanical and thermal mechanical cycle loading in the developed materials increased due to the role of reinforcement fiber. It was shown there is an optimum fiber weight fraction between 10 and 20 wt% to have an extremely low residual strain during cyclic loading. Although the shape memory effect of developed glass fiber reinforced shape memory PUs composites was affected by glass fiber weight fraction, it was confirmed that the shape memory effect was kept in the developed composite materials. 2004 Elsevier Ltd. All rights reserved.