Glass fiber reinforced polyethylene terephthalate (PET/GF) with enhanced flame retardancy was prepared with few-layer black phosphorus (BPs) for the first time. The performance of red phosphorus (RP) modified PET/GF was also investigated for comparison. Results show that PET/GF with 0.9 wt% BPs (PET/GF@BP-0.9) can eliminate the ignition of cotton by dripping. The addition of 2.7 wt% of BPs can make the PET/GF sample pass UL 94 V-0 classification, while a much higher of 6.3 wt% RP was needed to pass the same classification. Compared with neat PET/GF, the peak heat release rate (PHRR) and total heat release (THR) rate of PET/GF@BP-2.7 decreases ca. 52.5% and 34.8%, respectively. The studies of char residues reveal that BPs could act as a catalyst for char formation and the formed char could roughen the surface of GF and thus restrain the “wick effect.” Thermogravimetric analysis/infrared spectrometry shows that the addition of BPs significantly inhibited the release of gas-phase products. The attractive abilities of BPs as flame retardant provide a novel and effective way of PET/GF modification.

中文翻译：

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少层黑磷改性玻璃纤维增​​强PET

首次用少层黑磷（BPs）制备了具有增强阻燃性的玻璃纤维增​​强聚对苯二甲酸乙二醇酯（PET/GF）。还研究了红磷 (RP) 改性 PET/GF 的性能以进行比较。结果表明，含有 0.9 wt% BPs 的 PET/GF (PET/GF@BP-0.9) 可以通过滴落消除棉花的燃烧。添加 2.7 wt% 的 BPs 可以使 PET/GF 样品通过 UL 94 V-0 分类，而需要更高的 6.3 wt% RP 才能通过相同的分类。与纯 PET/GF 相比，PET/GF@BP-2.7 的峰值放热率 (PHRR) 和总放热率 (THR) 降低了约 分别为 52.5% 和 34.8%。对炭残留物的研究表明，BPs 可以作为炭形成的催化剂，形成的炭可以使 GF 表面变得粗糙，从而抑制“灯芯效应”。热重分析/红外光谱表明，BPs 的加入显着抑制了气相产物的释放。BPs 作为阻燃剂的吸引力为 PET/GF 改性提供了一种新颖有效的方法。