废印刷电路板非金属粉与埃洛石纳米管对不饱和聚酯热稳定性和阻燃性能的影响

Effects of waste printed circuit boards powders and hallosite nanotubes on the thermal stability and flame retardancy for unsaturated polyester resin

为减轻废印刷电路板非金属粉(WPCBP)在回收过程中对环境的污染和资源的浪费,实现WPCBP在聚合物基体中的高值化利用,将粉碎干燥后的WPCBP与埃洛石纳米管(HNTs)添加到不饱和聚酯树脂(UPE)基体中,制备了一种新型环保的WPCBP-HNTs/UPE复合材料。利用SEM和TEM对两种填料的结构形貌及其在复合材料中的分散状况和界面结合进行了表征,采用热失重分析仪、锥形量热仪、极限氧指数仪等对WPCBP-HNTs/UPE复合材料的热稳定性和阻燃性能进行了系统的研究。结果表明,WPCBP和HNTs能够显著提高复合材料的热分解稳定性和阻燃性能。通过SEM和EDS对复合材料燃烧后的碳渣进行了分析,并探讨了阻燃机制,分析了WPCBP和HNTs对WPCBP-HNTs/UPE复合材料的力学性能和热变形性能的影响。

To solve the environmental pollution and resources waste in recovery process of waste printed circuit hoards powders（WPCBP） and achieve its high-reutilization in polymer matrix, WPCBP was incorporated in unsatu- rated polyester resin（UPE） together with halloysite nanotuhes（HNTs） to prepare WPCBP-HNTs/UPE novel eco- friendly composites. SEM and TEM were used to characterize the structure and morphology of WPCBP and HNTs and their dispersity and interfacial interaction. Then the thermal stability and flame retardancy of WPCBP-HNTs/ UPE composites were systematically investigated by TGA, cone calorimeter test （CCT） and limit oxygen index （LOI）. It has been confirmed that WPCBP and HNTs can markedly enhance the thermal stability and fire retrardan- cy of UPE, and HNTs give a more positive contribution than WPCBP. The residue of UPE and WPCBP-HNTs/ UPE composites were analyzed by SEM and EDS to investigate the flame retardancy mechanism. The mechanical performance and thermal deformation property of WPCBP-HNTs/UPE composites were studied.