偶联剂对EP/APP体系燃烧和发烟性能的影响

研究了不同种类偶联剂对聚磷酸铵阻燃环氧树脂(EP/APP)体系拉伸强度、燃烧和发烟性能的影响规律。结果表明,钛酸酯和硅烷都能提高EP/APP体系的拉伸强度。从(EP/APP)体系阻燃性能的提高效果看,钛酸酯比硅烷更好,钛酸酯使EP/APP体系的氧指数从26.5提高到30.9,硅烷使EP/APP体系的氧指数从26.5提高到28.7。但硅烷对(EP/APP)体系的抑烟效果好,硅烷可使EP/APP体系的烟密度等级从76.84降到66.85,而钛酸酯使EP/APP体系发烟量加大,烟密度等级从76.84上升到86.41。研究结果表明,偶联剂在改善阻燃材料力学性能的同时,对体系的燃烧和发烟性能有重要影响。

The influence of coupling agents on the combustion and smoke production of EP/APP system

The influence of different coupling agents on the combustion and smoke production of epoxy resin treated with ammonia polyphosphate (EP/APP) system was studied. The results showed that the tensile strength of EP/APP in-creased when introduced titanate and silane coupling agents, it also indicated that the effect of titanate coupling agent on the flame retardancy of EP/APP was superior to that of silane coupling agent, The LOI of EP/APP increased from 26. 5 to 30. 9 and 28.7 when incorporated titanate and silane respectively. However, the effect of silane on smoke suppression of EP/APP was much better than that of titanate, the smoke density rate of EP/APP decreased from 76.84 to 66. 85 when si-lane was introduced, and the smoke density rate of EP/APP increased from 76. 84 to 86. 41 when titanate was introduced. The results indicated that coupling agents not only improved the mechanical properties of flame retarded materials, but also influence the combustion and smoke production of flame retarded materials.