Liang Xiaobin, Ito Makiko, Nakajima Ken
Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
Polymers (Basel). 2021 Nov 12;13(22):3922. doi: 10.3390/polym13223922.
In this study, atomic force microscopy (AFM) nanomechanics were used to visualize the nanoscale stress distribution in carbon black (CB)-reinforced isoprene rubber (IR) vulcanizates at different elongations and quantitatively evaluate their volume fractions for the first time. The stress concentrations in the protofibrous structure (stress chains) that formed around the CB filler in CB-reinforced IR vulcanizates were directly observed at the nanoscale. The relationship between the local nanoscale stress distribution and macroscopic tensile properties was revealed based on the microscopic stress distribution and microscopic spatial structure. This study can help us gain insight into the microscopic reinforcement mechanism of carbon black-containing rubber composites.
在本研究中，首次使用原子力显微镜（AFM）纳米力学来可视化炭黑（CB）增强异戊二烯橡胶（IR）硫化胶在不同伸长率下的纳米级应力分布，并定量评估其体积分数。在纳米尺度上直接观察到了CB增强IR硫化胶中CB填料周围形成的原纤维结构（应力链）中的应力集中。基于微观应力分布和微观空间结构，揭示了局部纳米级应力分布与宏观拉伸性能之间的关系。本研究有助于我们深入了解含炭黑橡胶复合材料的微观增强机理。
