新型磷酸化阻燃剂的合成及其在阻燃聚乳酸中的应用  

Synthesis of novel phosphorylated flame retardant and its application in flame-retardant polylactic acid

作　　者：王兴国 吕明福[1] 尹华[1] 谷晓昱[2] 张胜[2] WANG Xingguo;LV Mingfu;YIN Hua;GU Xiaoyu;ZHANG Sheng(Sinopec(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China;State Key Laboratory of Organic-Inorganic Composites,Bejing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中石化(北京)化工研究院有限公司,北京100013 [2]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《石油化工》2023年第5期693-699,共7页Petrochemical Technology

基　　金：国家自然科学基金项目(NSFC22075010)。

摘　　要：以苯甲醛、乙二胺和次磷酸为原料合成了一种新型高磷氮含量阻燃剂N,N'-双(膦酸化亚苄基)-1,2-乙二胺(BTHP),通过FTIR、1H NMR、TG和有机元素分析表征了BTHP的结构、组成和热稳定性,并通过熔融共混法制备了聚乳酸(PLA)/BTHP复合材料,测试了复合材料的阻燃性能和力学性能。实验结果表明,相比于PLA,添加10%(w)BTHP的PLA/BTHP复合材料的极限氧指数从19.0%提高至29.7%,垂直燃烧测试达到UL-94的V-0级别,并能够离火自熄,最大热释放速率和总热释放量分别降低了21.6%和20.3%。BTHP发挥了凝聚相阻燃机理,促进基体成炭,提高了复合材料的阻燃性能。A novel flame retardant N,N'-bis(phosphonic benzylidene)-1,2-ethylene diamine(BTHP)with high phosphorus and nitrogen content was synthesized using benzaldehyde,ethylenediamine and hypophosphate as raw materials.The structure,composition and thermal stability of BTHP were characterized by FTIR,1H NMR,TG,and organic element analysis.Polylactic acid(PLA)/BTHP complex material was prepared by melt blending method and the flame retardancy of it was tested.The experimental results show that the limiting oxygen index of PLA/10% BTHP(BTHP amount 10%(w))is increased to 29.7% from 19.0% of PLA sample,and the vertical burning test result achieves UL-94 V-0 level with self-extinguishment after ignition.The maximum heat release rate and total heat release decreases by 21.6% and 20.3%,respectively.The carbonization in the condensed phase is the main flame-retarded mechanism of BTHP,which improves the flame retardancy of the composites.

关 键 词：新型阻燃剂 聚乳酸 阻燃性能 热稳定性 

分 类 号：TQ314.24[化学工程—高聚物工业]