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首页> 外文期刊>Journal of Applied Polymer Science >Flame-retardant effects of cyclic phosphonate with HALS and fumed silica in polypropylene
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Flame-retardant effects of cyclic phosphonate with HALS and fumed silica in polypropylene

机译：环状膦酸酯与HALS和烟雾二氧化硅在聚丙烯中的阻燃效应

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In this study, an N-alkoxy-hindered amine-based UV stabilizing agent (NOR-116) and nanosized silica particles (Aerosil R-972) were combined with a cyclic phosphonate based-flame retardant (FR; PCO-900) and incorporated into polypropylene via melt extrusion in a microcompounder. In order to stimulate the conditions in the favor of further processing such as fiber spinning, the content of additives in polypropylene was kept low (up to 6.5 wt %). The effects of the PCO-900, alone and in combination with NOR-116 and Aerosil-R972, on the flammability and thermal stability of polypropylene were evaluated by limit oxygen index (LOI) tests, cone calorimetry, and thermogravimetric analysis. The proposed system with 3.5 wt % PCO-900/1.5 wt % NOR-116/1 wt % Aerosil-R972 decreased the heat release, increased the LOI and thermo-oxidative stability, and, thus, improved the fire resistance of polypropylene. The possible mode of FR activity was also discussed based on the analysis. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48308.
机译：在该研究中，将N-烷氧基受阻胺类的UV稳定剂（NOR-116）和纳米化二氧化硅颗粒（AEROSIL R-972）与基于环状的膦酸酯的阻燃剂（FR; PCO-900）合并并掺入通过熔融挤出成聚丙烯在微污染剂中。为了刺激有利于进一步加工的条件，如纤维纺丝，聚丙烯中添加剂的含量保持低（高达6.5wt％）。通过限制氧指数（LOI）试验，锥形量热法和热重分析，评估PCO-900单独和HOR-116和AEROSIL-R972对NOR-116和AEROSIL-R972的影响。具有3.5wt％PCO-900 / 1.5wt％NOR-116 / 1wt％Aerosil-R972的提出的系统降低了热释放，增加了LOI和热氧化稳定性，因此改善了聚丙烯的耐火性。还基于分析讨论了FR活性的可能模式。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48308。

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