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首页> 外文会议>Regional Conference of the Polymer Processing Society >INFLUENCE OF GAMMA RADIATION ON EPDM COMPOUNDS PROPERTIES FOR USE IN NUCLEAR PLANTS
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INFLUENCE OF GAMMA RADIATION ON EPDM COMPOUNDS PROPERTIES FOR USE IN NUCLEAR PLANTS

机译：γ辐射对核电站EPDM化合物性能的影响

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Various types of EPDM rubbers are used in radiation areas such as coating materials for wire and electrical cables, due to their higher resistance to environmental effects when compared to other types of rubbers. Properties set for EPDM rubbers that include degradation and good chemical resistance, besides excellent electrical properties have been stimulating the application of this elastomer for low and medium voltage (up to 35 kV). EPDM rubber is classified as radiation-resistant, because EPDM structure includes in its principal chain totally saturated bonds, and consequently is able to absorb more energy without cracking polymeric chain. The purpose of this work was studying radiation influence on rubbers compounds used in wires and electrical cables installed in Nuclear Plants. There were prepared EPDM compounds samples, further subjected to gamma radiation at doses: 25 kGy, 50 kGy, 75 kGy, 100 kGy and 200 kGy. Mechanicals properties and swelling properties were assessed in non-irradiated and irradiated samples at different doses. It was observed a reduction in tensile at break values, proportional to the dose applied and pointing toward a raise in material fragility. This reduction is more severe for doses higher than 100 kGy, indicating the predominance of chain-scission with further polymer degradation.
机译：由于与其他类型的橡胶相比，各种类型的EPDM橡胶用于辐射区域，例如用于电线和电缆的涂布材料，例如电线和电缆的涂层材料。除了具有降解和良好的耐化学性的EPDM橡胶设定的性质，除了出色的电性能之外，还刺激了该弹性体的施加低，中压（高达35kV）。 EPDM橡胶被归类为抗辐射抗性，因为EPDM结构包括其主链的完全饱和键，因此能够在不裂解聚合物链的情况下吸收更多的能量。这项工作的目的是研究辐射对核电站安装的电线和电缆中使用的橡胶的影响。制备EPDM化合物样品，进一步对γ辐射进行剂量：25 kgy，50 kgy，75 kgy，100 kgy和200 kgy。在不同剂量的非照射和辐照样品中评估机械性质和溶胀性能。它观察到断裂值的拉伸减少，与施加的剂量成比例，并指向材料脆性的提升。对于高于100kGy的剂量，这种减少更严重，表明链裂化具有进一步的聚合物降解的主要偏移。

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