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Electron Beam Curing of EVM and HNBR for Cable Compounds

机译:用于电缆料的EVM和HNBR电子束固化

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Due to their balanced profile of properties, EVM (Levapren~R) and HNBR (Therban~R) rubbers are well suited for cable applications in harsh environments. Cables used for military and navy must comply with very high requirements in terms of swelling in aggressive media (oils, ester based fluids, diesel) as well as high temperature resistance and mechanical performance. The properties of the finished rubber parts are defined by the microstructure of the polymers, the type and strength of the network formed during the electron beam treatment and by the interaction of the polymer matrix with reinforcing fillers. In this paper we systematically analyse the influence of radiation dosage and type and amount of coagents -typical for peroxide cure- on the crosslinking density of the resulting vulcanisates of HNBR, EVM and 75/25 HNBR and EVM blends. Based on our findings we are able to select the right polymer / blend composition as well as dosage of coagent and radiation to optimise the network density of electron beam cured compounds based on EVM and HNBR. Thus, an optimisation of technologically relevant properties of EVM and HNBR based compounds for specific applications can be achieved through selection of the specific coagent, polymer blending ratio and radiation dosage.
机译:由于它们的性能平衡,因此EVM(Levapren〜R)和HNBR(Therban〜R)橡胶非常适合恶劣环境中的电缆应用。用于军事和海军的电缆必须在腐蚀性介质(油,酯基流体,柴油)中溶胀以及耐高温和机械性能方面符合很高的要求。成品橡胶零件的性能由聚合物的微观结构,在电子束处理过程中形成的网络的类型和强度以及聚合物基体与增强填料的相互作用所定义。在本文中,我们系统地分析了辐射剂量,共助剂的类型和量(通常用于过氧化物固化)对所得的HNBR,EVM和75/25 HNBR和EVM混合物的硫化橡胶的交联密度的影响。根据我们的发现,我们能够选择正确的聚合物/共混物组成以及助剂和辐射的剂量,从而优化基于EVM和HNBR的电子束固化化合物的网络密度。因此,可以通过选择特定的助剂,聚合物共混比和辐射剂量来实现针对特定应用的基于EVM和HNBR的化合物的技术相关性能的优化。

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