负载型金属氧化物在聚丙烯(PP)/氢氧化铝(ATH)阻燃体系中的协效催化阻燃作用  

Synergistic Effect of Metal Oxide Supported Catalyst on Polypropylene/Aluminum Hydroxide Flame Retarded System

作　　者：李平立[1] 陈英红[1] 陈学[2] 沈磊[1] 盛燕[1] 

机构地区：[1]高分子材料工程国家重点实验室(四川大学),四川大学高分子研究所,四川成都610065 [2]四川省公安消防总队,四川成都610036

出　　处：《高分子材料科学与工程》2013年第2期94-98,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50973072)

摘　　要：为解决氢氧化铝(ATH)阻燃聚丙烯(PP)存在高添加量低阻燃效率问题,文中采取了在PP/ATH体系中引入硼酸锌(ZnB)/负载型金属氧化物(WMS)复合协效剂的方法。研究结果表明,ZnB的引入解决了PP/ATH阻燃材料的阴燃问题,WMS的引入显著提高了PP/ATH体系的残炭率,降低了材料的热释放速率、总热释放量和质量损失速率,因而降低了材料的火灾危险性。而ZnB与WMS的协同使用则显著改善了材料的阻燃性能。WMS对PP/ATH阻燃体系的协效催化阻燃作用归因于其具有促进基体树脂PP大分子链自身参与凝聚相成炭的作用。Zinc borate （ZnB） and ZnB/metal oxide supported catalyst （WMS） composite were introduced to enhance the flame retardancy of PP/aluminum hydroxide （ATH） material, respectively. The prepared flame retarded （FR） PP composite was characterized by UL94 vertical burning test, limiting oxygen index （LOI）, TGA and cone calorimeter test. The experimental results show that the additiqn of ZnB resolves the smoldering problem in the PP/ ATH system but fails in the vertical burning test. The combination of WMS with ZnB, however, greatly enhances the flame retardancy of PP/ATH FR material from failure to UL94 V-0 level. Cone calorimeter tests show that the introduction of the WMS/ZnB composite remarkably decreases heat release rate （HRR）, total heat release （THR） and mass loss rate （MLR）, so the fire risk reduces. The remarkably synergistically catalytic effect of WMS represented in the flame retardant property is attributed to the promotion of WMS to the possible participation of matrix PP macromolecular chains in the condensed char formation.

关 键 词：聚丙烯 氢氧化铝 无卤阻燃 负载型金属氧化物 催化成炭 

分 类 号：TQ314.248[化学工程—高聚物工业]