Synthesis of Self-healable Materials Based on Block Copolymers and Their Enhanced Mechanical Properties
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초록
내용
In this study, self-assembled diblock copolymers showing excellent self-healing and enhanced mechanical properties were synthesized. A random copolymer (MBN) 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 room temperature (TROOM) due to weak molecular interaction while it exhibited rubber-like behavior. To enhance mechanical properties of the self-healable materials synthesized in this study, polystyrene was sequentially synthesized to the MBN. From tensile test with MBN and MBN-b-PS, it was found that modulus and tensile strength of the MBN-b-PS were dramatically enhanced because of its self-assembly. As a result, it is confirmed that the MBN-b-PS exhibited improved mechanical properties as well as excellent self-healing performance at relatively low temperature range.