聚酰亚胺
材料科学
邻苯二甲酸酐
聚合物
自愈
酰亚胺
复合材料
玻璃化转变
高分子化学
有机化学
催化作用
替代医学
图层(电子)
病理
医学
化学
作者
Young Nam Kim,Jun Young Jo,Jimin Park,Juheon Lee,Jaewoo Kim,Dae‐Young Jeon,Haksoo Han,Yong Chae Jung
标识
DOI:10.1021/acsami.3c12594
摘要
Polyimide is actively applied in various industrial fields because of its strong mechanical properties, owing to the interactions between the polymer chains. Fully aromatic imide structures exhibit high glass-transition temperatures due to the strong interactions between their chains, which hinder chain mobility. Therefore, preparing a material that exhibits self-healing at a low temperature of ≤100 °C and good mechanical properties is challenging. Thus, we prepared imides with four-component semiaromatic structures by adjusting the contents of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride and 4,4'-(4,4'-isopropylidenediphenoxy)bis(phthalic anhydride) to yield four-component self-healable colorless polyimides (f-SH-CPIs) with novel structures, flexibilities, good mechanical properties, and low healing temperatures. The flexibilities and distances between the polymer chains, as the basis of the trade-off relationship between the mechanical properties and healing efficiency, were controlled. These materials may be used as substrates in wearable devices and multilayer insulation that may protect from space dust, cosmic rays, and satellite fragments.
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