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Damping performance of Eucommia ulmoides gum
Authors:Ji-chuan Zhang  Zhao-hong Xue  Rui-fang Yan
Affiliation:(1) Institute of Chemistry Chinese Academy of Science, Beijing, 100190, China
Abstract:
Eucommia ulmoides gum (EU gum), known as gutta percha in Southeast Asia, is a natural polymer with double characteristics of rubber and plastic. In present paper, tanδ-T curve and hysteresis loss (HL) were chosen to characterize its damping property. The results indicated that its tanδ value would increase with rising of temperature when T > 0°C and form another damping peak at 40–80°C besides T g peak. This phenomenon resulted from meltage of crystals of EU gum could increase its damping property at ambient-high temperature. Its tanδ value even exceeded those of conventional damping rubbers, such as nitrile-butadiene rubber (NBR) and chlorinated isobutene-isoprene rubber (CIIR).
Keywords:EU gum  Gutta percha  Crystalline characteristic  Damping property  Hysteresis loss
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