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首页> 外文期刊>Journal of Materials Engineering and Performance >Aging and Mechanical Properties of NM/BR Blends
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Aging and Mechanical Properties of NM/BR Blends

机译：NM / BR共混物的老化和力学性能

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摘要

The mechanical properties and post-thermal aging properties of natural rubber (NR) and polybutadiene rubber (BR) blends at different blending ratios are investigated herein. The experimental results show that both tensile and tear strengths of NR/BR blends increase with increasing NR content. BE has a higher compression stiffness than NE. The deformation of BR is less than that of NR under the same load conditions. With regard to aging properties, both tensile stress and strain of NM/BR blends decrease after prolonged aging. In addition, the stress loss of BR is lower than that of NR, meaning that the aging resistance property of BR is superior to that of NR. Furthermore, accumulated thermal history has shifted the glass transition temperature (T_g) of NR/BR blends toward lower temperatures while the loss tangent (tan delta) value increases with prolonged thermal aging.
机译：本文研究了天然橡胶（NR）和聚丁二烯橡胶（BR）混合物在不同混合比下的机械性能和热后老化性能。实验结果表明，NR / BR共混物的拉伸强度和撕裂强度均随NR含量的增加而增加。 BE具有比NE高的压缩刚度。在相同的载荷条件下，BR的变形小于NR的变形。关于老化性能，长时间老化后，NM / BR共混物的拉伸应力和应变均降低。此外，BR的应力损失低于NR的应力损失，这意味着BR的耐老化性能优于NR。此外，累积的热历史已经将NR / BR共混物的玻璃化转变温度（T_g）移向了较低的温度，而损耗角正切（tanδ）值则随着长时间的热老化而增加。

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