Natural rubber/nitrile butadiene rubber/hindered phenol composites with high-damping properties

• Published in: International journal of smart and nano materials Vol. 6; no. 4; pp. 239 - 250
• Main Authors: Zhao, Xiuying, Yang, Jingna, Zhao, Detao, Lu, Yonglai, Wang, Wencai, Zhang, Liqun, Nishi, Toshio
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 02-10-2015; Taylor & Francis Ltd; Taylor & Francis Group
• Subjects: damping properties; Gloves; Mechanical properties; natural rubber; nitrile butadiene rubber; Phenols; rubber bearing; strain-induced orientation
• ISSN: 1947-5411; 1947-542X
• DOI: 10.1080/19475411.2015.1131399

New natural rubber (NR)/nitrile butadiene rubber (NBR)/hindered phenol (AO-80) composites with high-damping properties were prepared in this study. The morphological, structural, and mechanical properties were characterized by atomic force microscopy (AFM), polarized Fourier transform infrared spectrometer (FTIR), dynamic mechanical thermal analyzer (DMTA), and a tensile tester. Each composite consisted of two phases: the NR phase and the NBR/AO-80 phase. There was partial compatibility between the NR phase and the NBR/AO-80 phase, and the NR/NBR/AO-80 (50/50/20) composite exhibited a co-continuous morphology. Strain-induced crystallization occurred in the NR phase at strains higher than 200%, and strain-induced orientation appeared in the NBR/AO-80 phase with the increase of strain from 100% to 500%. The composites had a special stress-strain behavior and mechanical properties because of the simultaneous strain-induced orientation and strain-induced crystallization. In the working temperature range of a seismic isolation bearing, the composites (especially the NR/NBR/AO-80 (50/50/20) composite) presented a high loss factor, high area of loss peak (TA), and high hysteresis energy. Therefore, the NR/NBR/AO-80 rubber composites are expected to have important application as a high-performance damping material for rubber bearing.