Synthesis of Mechanically Enhanced Self-Healable Materials Based on Random-Block Copolymers
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초록
내용
In this study, self-assembled random-block copolymers (RBCs) showing excellent self-healing and enhanced mechanical properties were synthesized via atomic transfer radical polymerization (ATRP). A random copolymer (MBN) as the first block of RBCs consisted of methyl methacrylate (MMA), butyl acrylate (BA), and 2-(N-phthalimido) ethyl methacrylate (NPEMA) with various composition was first synthesized. The MBN exhibited remarkable self-healing behavior at relatively low temperatures near TROOM due to weak molecular interaction. To enhance mechanical properties of the self-healable materials synthesized in this study, polystyrene (PS) was sequentially attached to the end of MBN chians. As a result, it was found that MBN-b-PS exhibited excellent self-healing performance in a relatively low temperature range and dramatically improved mechanical properties due to its self-assembly.