DOPO接枝氢氧化镁阻燃超高分子量聚乙烯研究  

Study on Magnesium Hydroxide Grafted with DOPO in Flame Retardant UHMWPE

作　　者：聂婭 金石磊[1,2] 段家真 NIE Ya;JIN Shi-lei;DUAN Jia-zhen(Shanghai Research Institute of Materials,Shanghai 200437,China;Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Shanghai 200437,China)

机构地区：[1]上海材料研究所,上海200437 [2]上海市工程材料应用与评价重点实验室,上海200437

出　　处：《塑料科技》2022年第10期45-48,共4页Plastics Science and Technology

摘　　要：采用9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)接枝氢氧化镁(MH)制备新型接枝型复合阻燃剂(D-MH),并用于超高分子量聚乙烯(UHMWPE)阻燃改性,对D-MH的化学结构进行表征,对阻燃改性后UHMWPE热释放、烟释放、热降解过程及力学性能进行分析。结果表明:D-MH对UHMWPE的阻燃效果明显优于未经过改性的MH阻燃剂,D-MH阻燃UHMWPE材料的热释放速率峰值和总热释放量与MH阻燃UHMWPE材料相比下降53.7%和69.3%,烟释放速率峰值和总烟释放量下降74.0%和86.8%,拉伸强度和无缺口冲击强度提高0.5倍和6.3倍。A novel grafted composite flame retardant(D-MH) was prepared by grafting magnesium hydroxide(MH) with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO),and used for flame retardant modification of ultra-high molecular weight polyethylene(UHMWPE).The chemical structure of D-MH was characterized,and the heat release,smoke release,thermal degradation process and mechanical properties of UHMWPE after flame retardant modification were analyzed.The results show that the flame retardant effect of D-MH on UHMWPE is significantly better than that of unmodified MH flame retardant.The peak heat release rate and total heat release of D-MH flame retardant UHMWPE material are decreased by 53.7% and 69.3% compared with MH flame retardant UHMWPE material.The peak smoke release rate and total smoke release are decreased by 74.0% and 86.8%,and the tensile strength and unnotched impact strength are increased by 0.5 times and 6.3 times.

关 键 词：超高分子量聚乙烯 氢氧化镁 阻燃改性 DOPO 

分 类 号：TB325[一般工业技术—材料科学与工程]