Zou Faxing, Chen Heng, Fu Shuqin, Chen Shaojun
Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen Key Laboratory of Special Functional Materials, College of Materials Science and Engineering, Shenzhen University Shenzhen 518060 China
RSC Adv. 2018 Jul 18;8(45):25584-25591. doi: 10.1039/c8ra05111a. eCollection 2018 Jul 16.
In this contribution, a series of adamantane (AD)-containing polyurethanes were prepared from 1,3-adamantanediol, 1,4-butanediol and hexamethylene diisocyanate, and the influences of AD on the shape memory behavior of polyurethanes were systematically studied. Due to large steric hindrance, AD was able to disrupt the regular arrangement of polyurethane chains and contributed to forming an amorphous domain. It was found that moderate AD-containing polyurethanes had good mechanical properties and broad glass transition, and shape memory tests confirmed these polyurethanes possessed a shape fixation rate of 98% and shape recovery rate of 91% during a dual-shape memory procedure. Furthermore, they also exhibited a triple-shape memory effect. This work demonstrated a facile and feasible way to prepare polyurethane-based shape memory materials by using adamantane as a functional unit.
在本论文中，由1,3 - 金刚烷二醇、1,4 - 丁二醇和六亚甲基二异氰酸酯制备了一系列含金刚烷（AD）的聚氨酯，并系统研究了AD对聚氨酯形状记忆行为的影响。由于空间位阻较大，AD能够破坏聚氨酯链的规则排列，有助于形成非晶区。研究发现，含适量AD的聚氨酯具有良好的力学性能和较宽的玻璃化转变温度，形状记忆测试证实这些聚氨酯在双形状记忆过程中形状固定率为98%，形状回复率为91%。此外，它们还表现出三重形状记忆效应。这项工作展示了一种以金刚烷为功能单元制备聚氨酯基形状记忆材料的简便可行方法。
