AbstractMagnesium hydroxide (MH) and alumina trihydrate (ATH) are extensively consumed as fillers in polyolefins to fabricate naturally responsive cables. Halogen-free wires, and especially cross-linked or thermoplastic elastomers, are further prevalent in worldwide use. The limited oxygen index (LOI), cone calorimeter, smoke density and thermogravimetry (TGA) experiments explain the thermal decomposition, flame-retardant and physical characteristics of samples. Results from studies of TGA, smoke emission and LOI testers showed that the thermal strength and flame-retardant characteristics of the samples containing MH compared with corresponding specimens containing ATH have superior thermal stability. The flame-retardant and heat resistance characteristics of samples were improved due to irradiation and the development of cross-linking bonds in the polymer framework. The results of the smoke density experiment show that adding MH to low-density polyethylene (LDPE) results in the lowest smoke density associated with LDPE and LDPE/ATH compounds. This study proved that the inclusion of MH and irradiation of specimens caused a greater thermal strength and also a superior flame-retardant polymeric product compared with the inclusion of ATH to similar irradiated specimens. These successes are useful and appropriate specifically for cable companies to deliver halogen-free flame-retardant cable materials.

中文翻译：

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辐照低密度聚乙烯及其复合材料的热稳定性和阻燃特性

摘要氢氧化镁 (MH) 和三水合氧化铝 (ATH) 被广泛用作聚烯烃中的填料来制造自然响应电缆。无卤电线，尤其是交联或热塑性弹性体，在全球范围内进一步普及。有限氧指数 (LOI)、锥形量热仪、烟密度和热重 (TGA) 实验解释了样品的热分解、阻燃和物理特性。TGA、烟雾排放和LOI测试仪的研究结果表明，与相应的含ATH样品相比，含MH的样品的热强度和阻燃特性具有更好的热稳定性。由于辐照和聚合物骨架中交联键的发展，样品的阻燃和耐热特性得到改善。烟密度实验的结果表明，将 MH 添加到低密度聚乙烯 (LDPE) 会导致与 LDPE 和 LDPE/ATH 化合物相关的最低烟密度。该研究证明，与包含 ATH 的类似辐照试样相比，包含 MH 和辐照试样导致更高的热强度和优异的阻燃聚合物产品。这些成功是有用的，特别适合电缆公司提供无卤阻燃电缆材料。烟密度实验的结果表明，将 MH 添加到低密度聚乙烯 (LDPE) 会导致与 LDPE 和 LDPE/ATH 化合物相关的最低烟密度。该研究证明，与包含 ATH 的类似辐照试样相比，包含 MH 和辐照试样导致更高的热强度和优异的阻燃聚合物产品。这些成功是有用的，特别适合电缆公司提供无卤阻燃电缆材料。烟密度实验的结果表明，将 MH 添加到低密度聚乙烯 (LDPE) 会导致与 LDPE 和 LDPE/ATH 化合物相关的最低烟密度。该研究证明，与包含 ATH 的类似辐照试样相比，包含 MH 和辐照试样导致更高的热强度和优异的阻燃聚合物产品。这些成功对于电缆公司提供无卤阻燃电缆材料非常有用和适用。