A phosphorus-, nitrogen- and carbon-containing polyelectrolyte complex: preparation, characterization and its flame retardant performance on polypropylene
A phosphorus-, nitrogen- and carbon-containing polyelectrolyte complex: preparation, characterization and its flame retardant performance on polypropylene
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DOI：
10.1039/c4ra09243k
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发表时间：
2014-10
期刊：
影响因子：
3.9
通讯作者：
Tao Zhang;Hongqiang Yan;L. Shen;Zhengping Fang;Xianming Zhang;Jiajun Wang;Baoyue Zhang
中科院分区：
文献类型：
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作者：
Tao Zhang;Hongqiang Yan;L. Shen;Zhengping Fang;Xianming Zhang;Jiajun Wang;Baoyue Zhang
以带正电的聚乙烯亚胺(PEI)和带负电的植酸(PA)为原料，制备了一种含磷、氮、碳元素的聚电解质复合体(PEC)。PEC在改善原始PP的热氧化稳定性和阻燃性能方面表现出良好的性能。当PEC含量为20wt%时，PP/PEC复合材料(PP/20PEC)在空气气氛下600℃时的残炭量比纯PP高10wt%。PP/20PEC的峰值放热速率和总放热量分别比原始PP低314W g−1和7.7kJ g−1。相比之下，PEI或PA在改善原始PP的热氧化稳定性和阻燃性能方面不如PEC有效。此外，PP/20PEC的残炭更加饱满致密，其表面覆盖着一层完美的膨胀层。这项工作为膨胀型阻燃体系的设计和制造提供了新的指导思想。
A new polyelectrolyte complex (PEC), containing phosphorus, nitrogen and carbon elements, has been prepared from positively charged polyethylenimine (PEI) and negatively charged phytic acid (PA). The PEC shows good performance in improving the thermo-oxidative stability and flame retardancy of pristine polypropylene (PP). When the content of PEC is 20 wt%, the char residues at 600 °C for the PP/PEC composites (PP/20PEC) are 10 wt% higher than those of pristine PP under an air atmosphere. Meanwhile, the peak heat release rate and total heat release of PP/20PEC are 314 W g−1 and 7.7 kJ g−1 lower than those of pristine PP, respectively. In comparison, PEI or PA is less effective than PEC in improving the thermo-oxidative stability and flame retardancy of pristine PP. Furthermore, the char residues of PP/20PEC are more full and compact, the surfaces of which are covered with a perfect intumescent layer. This work proposes a new guideline for designing and fabricating an intumescent flame retardant system.