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Open AccessArticle

Preparation and Properties of Rubber Blends for High-Damping-Isolation Bearings

1
School of Civil Engineering, Chang′an University, Xi′an 710061, China
2
School of Civil Engineering, Southeast University, Nanjing 210096, China
3
School of Materials Science and Engineering, Chang′an University, Xi′an 710064, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(8), 1374; https://doi.org/10.3390/polym11081374
Received: 7 July 2019 / Revised: 17 August 2019 / Accepted: 18 August 2019 / Published: 20 August 2019
(This article belongs to the Special Issue Reinforced Polymer Composites)
To improve the energy dissipation capacity of rubber isolation bearings, it is important to find a new rubber material with good applicability and high damping properties. Two types of blends were prepared using nitrile rubber (NBR), brominated butyl rubber (BIIR) and ethylene-vinyl acetate copolymer (EVA): NBR/BIIR and NBR/BIIR/EVA. The vulcanization, mechanical and damping properties of the blends were analyzed. The results show that both blends exhibit excellent vulcanization plateaus and mechanical properties. For NBR/BIIR, as the BIIR content increases, the complementary effects of NBR and BIIR afforded by blending are enhanced. Two damping peaks appeared in the tanδ-T curve and shifted toward lower and higher temperatures, respectively, which clearly widened the effective damping temperature range. However, the damping value in the valley of the tanδ-T curve was as low as 0.39. For NBR/BIIR/EVA, the addition of EVA greatly increased damping in the valley of the tanδ-T curve to approximately 0.54. EVA was observed to be the optimal polymer for improving the compatibility of the NBR/BIIR blend. Moreover, hot air thermal aging tests showed that both blends demonstrated good stability. View Full-Text
Keywords: composite materials; mechanical properties; damping properties; stability composite materials; mechanical properties; damping properties; stability
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MDPI and ACS Style

Lei, T.; Zhang, Y.-W.; Kuang, D.-L.; Yang, Y.-R. Preparation and Properties of Rubber Blends for High-Damping-Isolation Bearings. Polymers 2019, 11, 1374.

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