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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical and thermal properties of blends of low-density polyethylene and ethylene vinyl acetate crosslinked by both dicumyl peroxide and ionizing radiation for wire and cable applications
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Mechanical and thermal properties of blends of low-density polyethylene and ethylene vinyl acetate crosslinked by both dicumyl peroxide and ionizing radiation for wire and cable applications

机译：低密度聚乙烯和乙烯乙酸乙烯酯共混物的机械和热性能，可通过过氧化二枯基和电离辐射交联，用于电线和电缆应用

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摘要

Formulations of chemically crosslinked and radiation-crosslinked, low-density polyethylene (LDPE) containing an intumescent flame retardant such as ammonium polyphosphate were prepared. The influence of blending LDPE with a poly(ethylene vinyl acetate) copolymer (EVA) and the effects of various coadditives, including polyethylene grafted with maleic anhydride (PEgMA), vinyl silane with boric acid, and talc, on the mechanical and thermal properties were investigated. Chemical crosslinking by dicumyl peroxide and crosslinking by ionizing radiation from an electron-beam accelerator were both used and compared. Improved mechanical properties were observed by the partial replacement of LDPE with EVA. Similar mechanical or thermal properties were observed with coadditives such as PEgMA and vinyl silane with boric acid. The addition of a small amount of talc improved the tensile strength of the formulations. All crosslinked formulations showed good thermal stability on the basis of the retention of mechanical properties after thermal aging for 168 h at 135 degrees C and a hot-set test. (C) 2007 Wiley Periodicals, Inc.
机译：制备了化学交联的和辐射交联的，低密度聚乙烯（LDPE）的配方，该低密度聚乙烯包含膨胀型阻燃剂，例如聚磷酸铵。 LDPE与聚（乙烯乙酸乙烯酯）共聚物（EVA）的共混物以及包括马来酸酐接枝的聚乙烯（PEgMA），硼酸乙烯基硅烷和滑石粉在内的各种共添加剂对机械性能和热性能的影响是调查。均使用和比较了过氧化二枯基的化学交联和电子束促进剂的电离辐射的交联。通过用EVA代替LDPE，观察到了改善的机械性能。用共添加剂如PEgMA和乙烯基硅烷与硼酸观察到相似的机械或热性能。少量滑石粉的添加改善了制剂的拉伸强度。基于在135℃下热老化168小时和热固性测试后保留的机械性能，所有交联配方均显示出良好的热稳定性。 （C）2007 Wiley期刊公司

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