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Investigation of Aluminate Coupling Agent as Modifier and Its Application on Improving Flame Retardant of Intumescent Flame Retardant Coatings
Macromolecular Research ( IF 2.4 ) Pub Date : 2021-01-09 , DOI: 10.1007/s13233-020-8165-2
Haoran Jiang , Yong Jiang , Xianli Zhu , Yachao Wang

Intumescent flame retardant coating modified by aluminate coupling agent were prepared via sol-gel method using ammonium polyphosphate, Polyacrylamide, aluminate coupling agent (ACA), and boron nitride (BN). The effect of modification of ACA on its flame retardant and characterization were preliminarily studied by cone calorimeter, scanning electron microscope, surface tensiometer and contact angle measurement. It is found that the addition of ACA can increase the expansion rate of carbon layer, and a stronger blocking effect can lead to a better property of flame retardant. The sample containing BN, after being modified by 3M NaOH and ACA, dramatically decreases heat release rate, especially reduce the peak heat release rate (pHRR) by 54% and total heat release by 16%, respectively. Moreover, the time to ignition was delayed by 175%. Through examining the residues and pyrolysis products of the coating samples, the mechanism of enhanced flame retardant that promotes the char-forming and heat barrier of the modification of ACA and BN is proposed. This work can offer a significant guide for further studying of ACA and modified BN on the flame retardant.



中文翻译:

铝酸盐偶联剂作为改性剂的研究及其在膨胀型阻燃涂料中的应用

采用聚磷酸铵,聚丙烯酰胺,铝酸酯偶联剂(ACA)和氮化硼(BN)通过溶胶-凝胶法制备了铝酸酯偶联剂改性的膨胀型阻燃涂料。通过锥形量热仪,扫描电子显微镜,表面张力计和接触角测量,初步研究了ACA的改性对其阻燃性和表征的影响。发现添加ACA可以增加碳层的膨胀率,并且更强的阻断效果可以导致更好的阻燃性能。含BN的样品经过3M NaOH和ACA改性后,显着降低了放热速率,尤其是将峰值放热速率(pHRR)降低了54%,总放热降低了16%。此外,点火时间延迟了175%。通过检查涂料样品的残留物和热解产物,提出了增强阻燃剂促进ACA和BN改性的成炭和隔热的机理。这项工作可为进一步研究阻燃剂中的ACA和改性BN提供重要指导。

更新日期:2021-01-10
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