一种新型耐高温磷氮阻燃剂的合成及工艺优化
Synthesis and process optimization of a novel high-temperature resistant phosphorus-nitrogen flame retardant
针对高温工程塑料对阻燃剂高热稳定性的迫切需求,以苯基二氯化磷(DCPP)、哌嗪(PA)和无水硫酸镁(MgSO4)为原材料,设计并合成了一种新型磷-氮-镁协同阻燃剂(PN-Mg)。通过红外光谱(FT-IR)、X射线荧光光谱(XRF)和热重分析(TGA)对其结构、成分及热稳定性进行了系统表征。同时对反应工艺参数进行优化探究,确定最佳反应比例为n(DCPP)∶n(PA)∶n(Catalyst)∶n(MgSO4)=1.5∶1.0∶3.0∶3.0,PN-Mg阻燃剂产率为86%。结果表明,PN-Mg初始分解温度高达546.2℃,可耐受500℃以上的高温加工环境,解决了与传统工程塑料加工温度不匹配的核心瓶颈。
This paper addresses the urgent need for high thermal stability of flame retardants in high-temperature engineering plastics.A novel phosphorus-nitrogen-magnesium synergistic flame retardant (PN-Mg) was designed and synthesized using dichlorophenylphosphine (DCPP),piperazine (PA),and anhydrous magnesium sulfate (MgSO4) as raw materials.Its structure,composition,and thermal stability were systematically characterized by Fourier-transform infrared spectroscopy(FT-IR),X-ray fluorescence spectroscopy(XRF),and thermogravimetric analysis(TGA).The reaction process parameters were optimized,and the optimal reaction ratio was determined to be n(DCPP)∶n(PA)∶n(Catalyst)∶n(MgSO4)=1.5∶1.0∶3.0∶3.0,with a PN-Mg yield of 86%.The results show that PN-Mg has an initial decomposition temperature of up to 546.2℃,enabling it to withstand high-temperature processing environments above 500℃,effectively solving the core bottleneck of incompatibility with traditional engineering plastic processing temperatures.
热稳定性 / 苯基二氯化磷 / 哌嗪 / 耐高温 / 工艺优化
thermal stability / dichlorophenylphosphine / piperazine / high-temperature resistance / process optimization
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四川省科技计划项目(2024ZHYS0022)
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