磷系阻燃剂复配的阻燃丁基胶带的制备与性能

Preparation and performance of flame retardant butyl tape compounded with phosphorus-based flame retardant agent

采用机械共混法将三聚氰胺次磷酸盐(MHS)、氧化锌和丁基胶带预混料(BTP)进行混合,制备了氧化锌/MHS/BTP阻燃复合材料,探究了氧化锌与MHS之间的协效阻燃作用,通过扫描电子显微镜、极限氧指数、锥形量热、热重分析等研究了氧化锌/MHS/BTP复合材料的燃烧性能和热稳定性,通过持黏性和剥离强度研究了氧化锌对氧化锌/MHS/BTP复合材料黏结性能的影响。结果表明,氧化锌的加入可以调节MHS/BTP阻燃体系的成炭过程和发泡过程相匹配并产生完整的气室结构;体系的极限氧指数由28.5%增至33.0%,UL-94垂直燃烧等级由V-1提升到V-0级,MHS/BTP阻燃体系的热释放速率峰值最多可降低66.7%,总释放热降低了22.0%,烟生成速率峰值降低了67.3%,总烟释放量降低了58.5%;MHS/BTP阻燃体系的残炭质量分数由25.58%增至40.41%,最大热分解温度由344.96℃升至394.91℃;添加氧化锌会导致MHS/BTP阻燃体系的持黏性和剥离强度略有降低。

Zinc oxide/melamine hypophosphate(MHS)/butyl tape premix(BTP)flame-retardant composites were prepared by mixing MHS,zinc oxide and BTP using mechanical blending method and the synergistic flame retardant effect between zinc oxide and MHS was investigated.The combustion performance and thermal stability of zinc oxide/MHS/BTP composites were studied by scanning electron microscope,limited oxygen index,cone calorimetry and thermogravimetric analysis,and the effect of zinc oxide on the adhesive performance of zinc oxide/MHS/BTP composites was studied by persistent adhesion and peel strength test.The results showed that the addition of zinc oxide could adjust the carbon formation and foaming process of the MHS/BTP composite and result in the generation of a complete gas chamber structure.The limited oxygen index of the composite increased from 28.5%to 33.0%,the vertical combustion grade of UL-94 increased from V-1 to V-0,the peak of heat release rate of the MHS/BTP flame-retardant composite could decrease by 66.7%at most,the total heat release decreased by 22.0%,the peak of smoke release rate decreased by 67.3%and the total smoke release decreased by 58.5%.The mass fraction of carbon residue of the MHS/BTP flame retardant composite increased from 25.58%to 40.41%and the maximum thermal decomposition temperature increased from 344.96°C to 394.91°C.The addition of zinc oxide would lead to a slight reduction of persistent adhesion and peel strength of the MHS/BTP flame retardant composite.