文献类型：期刊文献

英文题名：Synergistic effects of resorcinol bis (diphenyl phosphate) (RDP) on the flame retardancy, foaming behavior, and thermal stability of poly (2,6-dimethyl-1,4-phenylene oxide) / polyamide (PPO/PA) composites

作者：Zeng, Xiangbu Li, Shengnan Xing, Jinfu Zhang, Xiaodie Zhang, Chun Gong, Wei He, Li Jiang, Tuanhui

第一作者：Zeng, Xiangbu

机构：[1] College of Materials and Metallurgy of Guizhou University, Gui Zhou, Guiyang, 550025, China; [2] Guizhou Material Industrial Technology Institute, Guizhou, Guiyang, 550014, China; [3] School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guizhou, Guiyang, 550025, China; [4] Guizhou Minzu University, Guizhou, Guiyang, 550025, China

第一机构：College of Materials and Metallurgy of Guizhou University, Gui Zhou, Guiyang, 550025, China

年份：2026

卷号：156

外文期刊名：Polymer Testing

收录：EI(收录号：20260920174116)

语种：英文

外文关键词：Blending - Composite materials - Flame retardants - Foams - Injection molding - Rheology - Runway foaming - Thermodynamic stability

摘要：This study explores the modification and foaming behavior of poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) and polyamide 6 (PA6) composites with resorcinol bis (diphenyl phosphate) (RDP) as the flame retardant. The composites were prepared by extrusion blending, followed by chemical foaming injection molding. The effects of RDP content and core-back distance on microstructure, thermal properties, rheological behavior, flame retardancy, and foaming performance were systematically evaluated. RDP improved the flame retardancy by forming a dense protective char layer, but simultaneously reduced the thermal stability and crystallinity due to its plasticizing effect. Notably, incorporation of RDP improved the foaming quality, producing a more uniform cellular structure with smaller cell size. Rheological analysis indicated that an increase in RDP content reduced the melt viscosity and elasticity, thus promoting superior foam formation. The foamed structure could reduce the LOI value slightly, compared to un-foamed samples, but the overall flame retardancy remained high. At 8% RDP loading, the average cell diameter reached 87 μm, and the cell density increased to 5.3 × 105 cells/cm3. This shows the synergistic effects of RDP on the flame retardancy and foaming performance of the composites. These findings underscore the potential of PPO/PA6 composites for applications demanding lightweight materials with enhanced fire safety. ? 2026 The Authors.