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首页> 外文期刊>RSC Advances >Enhanced fire-retardancy of poly(ethylene vinyl acetate) electrical cable coatings containing microencapsulated ammonium polyphosphate as intumescent flame retardant
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Enhanced fire-retardancy of poly(ethylene vinyl acetate) electrical cable coatings containing microencapsulated ammonium polyphosphate as intumescent flame retardant

机译：包含微囊化聚磷酸铵作为膨胀型阻燃剂的聚（乙烯乙酸乙烯酯）电缆涂料的增强的阻燃性

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There is a need to improve and maintain the protection function of ethylene-vinyl acetate copolymer (EVA) cable materials from ageing degradation to avoid fire hazards and extend their service lives. Here, a flame retardant, branched silane precursor, pentaerythritol triacrylate-(3-aminopropyl) triethoxysilane (PETA-APTS), containing a vinyl group and hydrolysable silane structure was successfully synthesized and characterized, and it was used to prepare microencapsulated ammonium polyphosphate (MCAPP) particles with tetraethoxy silane via a successive Stober method, which aimed to immobilize the MCAPP into the EVA matrix through a crosslinking treatment. Damp-heat ageing tests (85 degrees C, 85% R.H.) were carried out on the EVA/APP (EVA-1 system) and EVA/MCAPP (EVA-2 system) to explore the protective effect of the microencapsulation method over 6 weeks. Digital photos, SEM images, gel-content tests and X-ray photoelectron spectroscopy results showed that the MCAPP particles had excellent compatibility with the EVA matrix and did not migrate or eroded with water vapor at 85 degrees C. Remarkably, this phenomenon led to great improvements in the mechanical properties, electrical insulation performance and fire safety for the EVA-2 system compared to the EVA-1 system. This investigation provided a formulation for the industrial application of the EVA/IFR cable as an insulated material with excellent long-term stability and fire safety.
机译：需要改善和维持乙烯-乙酸乙烯酯共聚物（EVA）电缆材料的保护功能，以防止其老化，从而避免火灾隐患并延长其使用寿命。在此，成功合成并表征了具有乙烯基和可水解硅烷结构的阻燃支化硅烷前体季戊四醇三丙烯酸酯-（3-氨基丙基）三乙氧基硅烷（PETA-APTS），并用于制备微囊化聚磷酸铵（MCAPP ）通过连续的斯托伯（Stober）方法用四乙氧基硅烷制成的颗粒，其目的是通过交联处理将MCAPP固定在EVA基质中。在EVA / APP（EVA-1系统）和EVA / MCAPP（EVA-2系统）上进行了湿热老化测试（85摄氏度，相对湿度85％），以研究微囊化方法在6周内的保护作用。数码照片，SEM图像，凝胶含量测试和X射线光电子能谱结果表明，MCAPP颗粒与EVA基质具有优异的相容性，并且在85摄氏度时不会迁移或被水蒸气侵蚀。与EVA-1系统相比，EVA-2系统的机械性能，电绝缘性能和防火安全性得到了改善。这项研究为EVA / IFR电缆作为绝缘材料的工业应用提供了一种配方，具有出色的长期稳定性和防火安全性。

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