Challenge for trade-off relationship between mechanical property and healing efficiency of self-healable polyimide
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초록
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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. The flexibilities of 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 multi-layer insulation that may protect from space dust, cosmic rays, and satellite fragments.