聚氨酯是一种多嵌段共聚物,可通过调节原料的组成和配比,得到性能各异的新型功能高分子材料.由硬段、软段交替排列组成的聚氨酯分子链,具有微相分离的本体结构,符合热致形状记忆高分子的条件,并具有良好的强度、硬度、耐磨性、耐挠曲性和生物相容性等优异性能.本文概括了聚氨酯的形状记忆原理和特征,并对形状记忆聚氨酯的研究进展作了重点阐述.
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