Kyushu University · Materials Science
아쓰시 타카하라 교수의 연구실은 고분자 재료의 거동과 내구성을 이해하기 위해 동적 공유 결합, 기계적 스트레인 감지 기능을 가진 기계학성 분자, 그리고 양이온성 고분자와 같은 스마트 고분자 시스템을 중심으로 연구를 진행하고 있습니다. 특히 자가치유 고분자, 수소 친화성 표면, 그리고 외부 자극(빛, 기계적 힘)에 반응하는 고분자 설계에 초점을 맞추고 있으며, 고해상도 분석 기법(ESR, 중성자 반사도, 동적 광산란 등)을 통해 고분자 구조와 거동을 정량적으로 규명하고 있습니다.
Figures are computed from collected data and may differ slightly.
Linked: Polymers cross-linked with diarylbibenzofuranone units have been prepared by polyaddition. The exchange of bonds of the gels and their macroscopic self-healing were accomplished under air at room temperature in the dark. The macroscopic fusion of completely separated parts was successful (see picture). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as s
A disulfide-containing polyester indicates a dynamic nature in a bulk state based on a disulfide metathesis reaction driven by photoirradiation.
Super-hydrophilic polymer brushes were prepared by surface-initiated atom transfer radical polymerization of 2-methacryloyloxyethyl phosphorylcholine (MPC) on initiator-immobilized silicon wafers. The graft density was estimated to be 0.22 chains nm based on the linear relationship between and the layer thickness. The contact angle against water was very low, and air bubbles in water hardly attached onto the brush surface, indicating a super-hydrophilic surface. Neutron reflectivity measurements
Visualization and quantitative evaluation of covalent bond scission in polymeric materials are highly important for understanding failure, fatigue, and deterioration mechanisms and improving the lifetime, durability, toughness, and reliability of the materials. The diarylbibenzofuranone-based mechanophore radical system enabled, through electron paramagnetic resonance spectroscopy, in situ quantitative evaluation of scission of the mechanophores and estimation of mechanical energy induced along
Zwitterionic polymers constitute a unique class of polyelectrolytes which have not been studied systematically because of the difficulty in their controlled synthesis and precise physicochemical characterization. The salt-concentration dependence of the chain dimensions and swollen brush structures of polyzwitterions, namely poly(2-methacryloyloxyethylphosphorylcholine) (PMPC) and poly[3-(N-2-methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate] (PMAPS), in aqueous solutions of various ion
A series of segmented polyurethanes (SPUs) containing various polyol soft segments was prepared and their resistance to oxidative degradation was investigated after aging in AgNO3 solution. The SPU with the polyether soft segment showed a large reduction in mechanical strength after exposure to the oxidative environment. Surface cracking was often observed for these specimens. XPS measurements revealed that scission of the ether linkage occurs upon oxidation. The oxidative resistance of SPUs con
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