2025 年 98 巻 4 号 p. 93-96
The Polymer Physics and Function Laboratory at Department of Material Chemistry, Kyoto University, conducts advanced research on the mechanical and rheological properties of soft materials such as elastomers and gels. Its origins trace back to 1963, emphasizing fundamental research in polymer rheology, a discipline addressing deformation and flow behaviors across molecular to macroscopic scales. The lab currently focuses on analyzing large deformations, fracture behaviors, and stress-induced crystallization (SIC) in soft materials, employing innovative techniques such as independent biaxial stretching and digital image correlation (DIC). Key projects include analyzing SIC near crack tips in natural rubber (NR), where localized crystallization significantly enhances crack resistance. The lab combines µm-scale DIC, microbeam WAXS, and hyperelastic modeling to reveal spatial distributions of strain tensors, crystallinity, and stress tensors around cracks. Additionally, independent biaxial stretching enables precise mapping of strain energy functions, strain-induced hardening, and other unique material responses. By integrating advanced analytical methods, the lab is pioneering novel approaches to soft material mechanics. Looking forward, it plans to further expand its innovative research, ensuring rigor and originality in addressing critical scientific challenges.
