Abstract Catalyzing carbonization of polymer itself to form a protective carbonaceous layer has been proven to be an effective way to improve polymer's flame retardancy, but there is still a great challenge to achieve synchronous enhancement in traditional test standards (such as LOI and UL-94 testing). In this study, a stiffener skeleton strategy combined with catalyzing carbonization was proposed to improve the flame retardancy of polycarbonate (PC). The synergistic effect of nanosized carbon black (CB)/Ni2O3 on carbon yield and combustion properties of PC were investigated. An improvement with 31.4% in LOI, V0 in UL-94, and 50% reduction for PHRR in cone calorimeter test was achieved. According to char morphology and structure analysis, the flame retardancy mechanism was attributed to the enhanced barrier effect of carbon layer with interconnected structure and self-supporting capacity, which was promoted by the formation of carbon skeleton framework from PC and the catalytic carbonization from combined catalysts.

中文翻译：

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一种具有增强碳层结构和改进阻燃性的催化碳化系统中的新型加强筋骨架策略

摘要 催化聚合物自身碳化形成保护性碳质层已被证明是提高聚合物阻燃性的有效途径，但在传统测试标准（如LOI和UL-94测试）中实现同步增强仍存在很大挑战。 ）。在这项研究中，提出了一种结合催化碳化的加强筋骨架策略来提高聚碳酸酯（PC）的阻燃性。研究了纳米炭黑 (CB)/Ni2O3 对 PC 的碳产率和燃烧性能的协同作用。在锥形量热计测试中，LOI 提高了 31.4%，UL-94 中的 V0 和 PHRR 降低了 50%。根据炭的形态和结构分析，