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首页> 外文期刊>Journal of Applied Polymer Science >EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON DYNAMIC MECHANICAL PROPERTIES OF EPDM GUM AND ITS CARBON BLACK COMPOUNDS
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EFFECTS OF TEMPERATURE AND STRAIN AMPLITUDE ON DYNAMIC MECHANICAL PROPERTIES OF EPDM GUM AND ITS CARBON BLACK COMPOUNDS

机译：温度和应变幅值对EPDM胶及其碳黑化合物动态力学性能的影响

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摘要

The effects of carbon black loadings phi, temperature T and shear frequency omega on dynamic mechanical properties of EPDM gum elastomer and its carbon black compounds were investigated under sinusoidal shear flows. The region of shear flows where the gum elastomer and its carbon black compounds exhibited characteristic plateau in viscoelastic properties were established and found to directly depend on temperature but were inversely proportional to carbon black loading. The gum rubber and its 20% carbon black compound showed rather unusual similar dynamic flow behaviors at 50 and 100 degrees C attributed to the possible presence of crystallinity from the fractional ethylene components in the gum, This fraction could act as nucleation sites for macrogels that required higher temperatures than 50 and 100 degrees C for melting, particularly in the presence of carbon black particles. Dynamic properties were amplified due to carbon black filler. This effect was more pronounced at low frequencies and at 50 and 150 degrees C, respectively. At 100 degrees C, amplifications appeared to have been attenuated by the hydrodynamics of the continuum elastomer matrix. This observation helps the further understanding of the filler-elastomer interactions and the critical role played by temperature, particularly as it affects rubber processors. (C) 1996 John Wiley & Sons, Inc. [References: 20]
机译：研究了正弦剪切流下炭黑负载phi，温度T和剪切频率ω对EPDM胶弹性体及其炭黑化合物动态力学性能的影响。建立了剪切流动的区域，在该区域中，胶弹性体及其炭黑化合物在粘弹性中表现出特征性的平稳期，并发现其直接取决于温度，但与炭黑的含量成反比。口香糖橡胶及其20％的炭黑化合物在50和100摄氏度下表现出相当不寻常的相似动态流动行为，这归因于口香糖中的部分乙烯组分可能存在结晶性。该部分可作为所需的大凝胶的成核位点熔融温度要高于50和100摄氏度，尤其是在炭黑颗粒存在的情况下。由于炭黑填料，动态性能得到了增强。分别在低频和50摄氏度和150摄氏度时，这种影响更为明显。在100摄氏度时，连续弹性体基体的流体动力学似乎已减弱了放大作用。该观察结果有助于进一步了解填料-弹性体的相互作用以及温度所起的关键作用，特别是当温度影响橡胶加工者时。 （C）1996 John Wiley＆Sons，Inc. [参考：20]

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