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首页> 外文期刊>Polymers for advanced technologies >New pivot for investigating flame-retarding mechanism: Quantitative analysis of zinc phosphate doped aliphatic waterborne polyurethane-based intumescent coatings for flame-retarding plywood
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New pivot for investigating flame-retarding mechanism: Quantitative analysis of zinc phosphate doped aliphatic waterborne polyurethane-based intumescent coatings for flame-retarding plywood

机译：用于调查阻燃机理的新枢轴：磷酸锌磷酸锌磷酸锌的定量分析，用于阻燃胶合板的脂族水性聚氨酯基膨胀型膨胀型

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摘要

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 m(2)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 center dot 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(alpha)corresponding to 95-200 degrees 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.
机译：以脂肪族水性聚氨酯（AWP）为涂层粘结剂，采用锥形量热仪（CC）和热解动力学等方法，定量分析了磷酸锌（ZnP）对膨胀型阻燃涂料（IFRC）阻燃性能的影响。CC结果表明，AWP基涂层中ZnP的适当用量（2 wt%）可提高阻燃性，防火性能指数从0.41秒m（2）kW（-1）增加到0.71秒m（2）kW（-1），防火增长指数降低。表征分析确定，脱水ZnP有助于形成具有热沉效应的无定形残炭，导致吸热增加，从253.00 J中心点g（-1）上升到351.30 J中心点g（-1）。此外，热解动力学验证了3D Jander模型（n=2）通过改进的Coats-Redfern积分法主要控制纯涂层的整个热解过程。含ZnP涂层的E（α）提高，对应于95-200摄氏度，从24.96 kJ mol（-1）上升到35.80 kJ mol（-1），从而形成连续且致密的炭层。探索了有机-无机杂化阻燃剂阻燃性能的有效定量分析，深化了阻燃机理。

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