Toward a new approach to synchronously improve the fire performance and toughness of polylactic acid by the incorporation of facilely synthesized ammonium polyphosphate derivatives
writer：Quan Wu, Xinyu Cui, Chenzhong Mu, Jun Sun, Xiaoyu Gu, Hongfei Li, ShengZhang
keywords：新型聚磷酸銨衍生物的合成及其在阻燃聚乳酸復合材料中的應用
source：期刊
specific source：Composites Part A: Applied Science and Manufacturing
Issue time：2021年
Polylactic acid (PLA) with eco-friendliness exhibits extensive potential applications. In order to enhance fire-resistance of PLA, this manuscript reports the preparation of boron-containing ammonium polyphosphate (B-APP) using 3-aminophenyl boronic acid and ammonium polyphosphate through ion exchange reaction, and incorporated into PLA matrix. The limiting oxygen index (LOI) of PLA-5% B-APP was increased from 19.2% to 29.4% and a UL-94 V-0 rating. In the cone calorimeter tests, PLA-5% B-APP presented a total heat release (THR) reduction from 81 MJ·m?2 to 67 MJ·m?2 and an improvement from 1.6% to 6.7% in char residue comparing with PLA. The mechanism of B-APP was mainly ascribed to the formation of glassy char layers to block the heat and oxygen transfer. For mechanical properties, it could be also found that the elongation at break and impact strength were improved at the presence of 5% B-APP.
具有生態友好性的聚乳酸 (PLA) 具有廣泛的潛在應用。為了提高 PLA 的耐火性，本手稿報道了使用 3-氨基苯基硼酸和多磷酸銨通過離子交換反應制備含硼多磷酸銨 (B-APP)，并摻入 PLA 基質中。PLA-5% B-APP 的極限氧指數 (LOI) 從 19.2% 增加到 29.4%，達到 UL-94 V-0 等級。在錐形量熱儀測試中，PLA-5% B-APP 的總放熱 (THR) 從 81 MJ·m -2減少到 67 MJ·m -2與 PLA 相比，焦炭殘留量從 1.6% 提高到 6.7%。B-APP 的機制主要歸因于玻璃炭層的形成以阻止熱量和氧氣的傳遞。對于機械性能，還可以發現在 5% B-APP 的存在下，斷裂伸長率和沖擊強度得到改善。
DOI: 10.1016/j.compositesa.2021.106595