Synthesis of a novel polyhydroxy triazine-based charring agent and its effects on improving the flame retardancy of polypropylene with ammonium polyphosphate and zinc borate
Synthesis of a novel polyhydroxy triazine-based charring agent and its effects on improving the flame retardancy of polypropylene with ammonium polyphosphate and zinc borate
复制标题
新型多羟基三嗪类炭化剂的合成及其对聚磷酸铵和硼酸锌聚丙烯阻燃性能的改善作用
DOI：
10.1016/j.polymdegradstab.2020.109123
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发表时间：
2020
影响因子：
5.9
通讯作者：
Zhang Sheng
中科院分区：
文献类型：
--
作者：
Wu Quan;Guo Jia;Fei Bin;Li Xinjian;Sun Jun;Gu Xiaoyu;Li Hongfei;Zhang Sheng
以哌嗪、三聚氯氰和三羟甲基氨基甲烷为原料，合成了一种新型多羟基三嗪类成炭剂N-三羟甲基氨基三嗪-哌嗪共聚物（TTPC）。用傅里叶变换红外光谱和13 C固体核磁共振对其结构进行了表征。采用熔融共混法将TTPC、聚磷酸铵（APP）和硼酸锌（ZB）引入聚丙烯（PP）中，以改善PP的阻燃性能。试验结果表明，质量比为16：4：1的21% APP-TTPC-ZB可显著降低热释放速率峰值，使其从1547 kW/m2降至230 kW/m2，极限氧指数值从18.0%提高到29.6%，UL-94等级从无级提高到V-0级，同时消除了熔体滴落现象。采用热重分析法研究了复合材料的热稳定性和成炭行为。结果表明，TTPC是一种高效的成炭剂，ZB在膨胀体系中可起到分散剂的作用。通过对TTPC的燃烧性能、成炭形态和力学性能的综合研究，认为TTPC是一种上级的成炭剂，尤其是与常用的季戊四醇相比。
A novel polyhydroxy triazine-based charring agent, N-tris(hydroxymethyl)-amino triazine-piperazine copolymer (TTPC), was synthesized from piperazine, cyanuric chloride and tris(hydroxymethyl) aminomethane. The chemical structure of TTPC was characterized by Fourier transform infrared spectroscopy and13C solid-state nuclear magnetic resonance. TTPC, ammonium polyphosphate (APP) and zinc borate (ZB) were then introduced into polypropylene (PP) by melt compounding to improve the fire performance of the composites. The test results showed that the presence of 21% APP-TTPC-ZB with mass ratio of 16:4:1 could significantly reduce the peak heat release rate from 1547 to 230 kW/m2, increase the limiting oxygen index value from 18.0 to 29.6% and upgrade the UL-94 rating from no rating to V-0, accompanied by the elimination of melt dripping. The thermal stability and charring behaviors of the composite samples were investigated by thermogravimetric analysis. The results showed that TTPC was a highly efficient charring agent, and ZB could act as synergist in the intumescent system. Based on the comprehensive study of fire performance, char morphology and mechanical properties, it can be concluded that TTPC is a superior charring agent, especially compared with the generally used pentaerythritol.