Flame retardant performance of nano-Sb₂O₃/BEO/PP composites

• Main Authors: XU Jian-lin, LIU Xiao-qi, YANG Wen-long, NIU Lei, ZHAO Jin-qiang
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2019-01-01
• Series: Journal of Materials Engineering
• Subjects: polypropylene; nano-Sb₂O₃; brominated epoxy resin; flame retardant performance
• Online Access: http://jme.biam.ac.cn/CN/Y2019/V47/I1/84

To improve flame retardant properties of polypropylene,the brominated epoxy resin (BEO) and nano-Sb₂O₃ were added into polypropylene by using a high energy ball milling technique. Flame retardant properties of polypropylene composites were evaluated by UL94 vertical combustion tests and limit oxygen index (LOI). The surface morphology of combustion products of composites was characterized by scanning electron microscopy(SEM) and the flame-retardant mechanism of flame retardant additives acting on the polymer matrix was studied by using thermo gravimetric analysis(TGA) and Fourier transform infrared (FT-IR) spectroscopy. The results show that the reaction between modified nano-Sb₂O₃ and BEO can prolong residence of the halogens in the combustion area, resulting in more hydroxyl and hydrogen radicals are replaced by the bromine radicals. When the content of modified nano-Sb₂O₃ is 7% (mass fraction, the same below) and that of BEO is 21%, the nano-Sb₂O₃/BEO/PP composite has excellent flame retardant performance with 28.6% of LOI value and V-0 of UL94 grade of vertical combustion.