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Open AccessArticle

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

School of Civil Engineering, Chang′an University, Xi′an 710061, China
School of Civil Engineering, Southeast University, Nanjing 210096, China
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;
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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