The quantitative analysis of zinc phosphate (ZnP) on the flame resistance of intumescent flame retardant coatings (IFRCs) is presented including cone calorimeter (CC) and pyrolysis kinetics, using aliphatic waterborne polyurethane (AWP) as the coating binder. The CC results show that an appropriate dosage (2 wt%) of ZnP in the AWP‐based coating constitutes an improved flame resistance, evidenced by the fire performance index increased from 0.41 to 0.71 seconds m² kW⁻¹, as well as the reduced fire growth index. The characterization analysis determines the dehydrated ZnP facilitates the formed amorphous char‐residue with a heat‐sink effect, leading to an increase in heat absorption, which climbs from the 253.00to 351.30 J·g⁻¹. Besides, the pyrolysis kinetics verifies that the 3D Jander model (n = 2) mainly governs the whole pyrolysis process of pure coatings by the modified Coats‐Redfern integral method. The ZnP‐containing coating exerts an improved E_α corresponding to 95–200°C, which climbs from 24.96 to 35.80 kJ mol⁻¹, leading to the formation of a continuous and compact char layer. It explores an effective quantitative analysis of the flame resistance of organic–inorganic hybrid IFRCs, deepening the flame‐retarding mechanism.

中文翻译：

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研究阻燃机理的新方法：定量分析掺磷酸锌的脂肪族水性聚氨酯基阻燃膨胀胶合板涂料

提出了使用脂肪族水性聚氨酯（AWP）作为涂层粘合剂对膨胀型阻燃涂料（IFRC）的阻燃性进行磷酸锌（ZnP）的定量分析，包括锥形量热仪（CC）和热解动力学。CC结果表明，在AWP基涂料中合适的ZnP用量（2 wt％）构成了改进的阻燃性，其防火性能指数从0.41秒增加到0.71秒m ² kW ^-1，并且降低了火势增长指数。表征分析确定了脱水的ZnP促进了形成的无定形炭渣的散热效果，从而导致吸热量的增加，从253.00 J.g ^-1攀升至351.30 J·g ^-1。此外，热解动力学验证了3D Jander模型（n = 2）是否主要通过改进的Coats-Redfern积分方法控制了纯涂层的整个热解过程。含ZNP涂施加一种改进ë _α对应于95-200℃，从24.96其爬升到35.80千焦摩尔^-1，导致连续的和紧凑的炭层的形成。它探索了有机-无机混合IFRC阻燃性的有效定量分析，从而加深了阻燃机理。