KMS Chongqing Institute of Green and Intelligent Technology, CAS
Evolution of terahertz dielectric permittivity of rubber during thermo-oxidative aging | |
Chang, Tianying1,2; Zhang, Xiansheng2; Cui, Hong-Liang1,3 | |
2018 | |
摘要 | Polymer materials such as rubber and plastics are prone to aging induced degradation, especially thermo-oxidative aging. In this paper, terahertz time-domain spectroscopy was employed to investigate the aging process of styrene butadiene rubber by spectrally following the evolution of its dielectric permittivity in the terahertz frequency region during prolonged high-temperature, accelerated, continuous thermo-oxidative aging. The real and imaginary parts of the dielectric constant in the 0.1-0.8THz frequency band were obtained and analyzed, and shown to be consistent with present theoretical understanding. The study revealed a close relationship between the evolution of the rubber's dielectric permittivity and the material's physical response to the terahertz electromagnetic radiation during thermo-oxidative aging, manifesting a strong correlation between quantitative changes of the dielectric permittivity and the degree of aging, which can be understood qualitatively in terms of dynamical structural changes at the molecular level. |
关键词 | Terahertz Rubber Thermo-oxidative Aging Dielectric Permittivity |
DOI | 10.1002/mop.30930 |
发表期刊 | MICROWAVE AND OPTICAL TECHNOLOGY LETTERS |
ISSN | 0895-2477 |
卷号 | 60期号:1页码:127-134 |
收录类别 | SCI |
WOS记录号 | WOS:000416937700022 |
语种 | 英语 |