【摘要】 采用硅烷偶联剂(KH-550)对茶皂素复合型膨胀阻燃剂(CTS-IFR)进行改性处理,并应用于阻燃涂料.考察了硅烷偶联剂改性茶皂素膨胀阻燃剂(SMTS-IFR)的制备工艺,采用FTIR和SEM对改性阻燃剂进行了结构表征,采用同步热分析仪测试了其热解性能,并对含该改性阻燃剂的阻燃涂料(SMTS-IFRC)进行了阻燃性能及燃烧性能分析.结果表明:硅烷偶联剂改性阻燃剂制备的适宜条件为改性温度80℃,反应时间4h,硅烷偶联剂用量2.5%(质量分数);所制改性阻燃剂中硅烷偶联剂与阻燃剂被证实发生了反应,形成了良好包覆,分散均匀,具有良好的热稳定性,且其高温残炭量明显增加;锥形量热试验结果表明,含该改性阻燃剂的阻燃涂料具有良好的耐火性能,且改性阻燃剂涂料试样燃烧过程中的平均热释放速率为62.29kW/m2,总热释放量为52.66kJ/m2,平均有效燃烧热为11.31kJ/kg,平均质量损失速率为0.046 91g/s,较未改性的阻燃剂涂料,其阻燃性能明显提高.更多还原

【Abstract】 A silane coupling agent(named KH-550)was used to modify composite intumescent flame retardant containing tea saponin(CTS-IFR),which was applied in flame retardant coatings.The preparation conditions of the silane coupling agent modified tea saponin flame retardant(SMTS-IFR)were investigated.The structure of SMTS-IFR was characterized by FT-IR and SEM,the thermal decomposition properties were performed by simultaneous thermal analyzer,and the flame retardant and combustion performance of coatings containing SMTS-IFR(SMTS-IPRC)were also measured by Cone calorimeter.The results showed that the suitable modification reaction conditions were at the temperature of 80℃,the reaction time of 4h,and the addition of 2.5%silane coupling agent in tea saponin intumescent flame retardant.It showed that the reaction between silane coupling agent and flame retardant system occured,and the flame retardant was cladded and dispersed uniformly.SMTS-IFR had good thermal stability and higher carbon residue at high temperature compared with that of CTS-IFR.Cone calorimeter test showed that coating sample containing SMTS-IFR had a good flame retardant with a heat release rate for an average of 62.29kW/m2,a total heat release of 52.66kJ/m2,a mean effective heat of combustion of 11.31kJ/kg,and an average mass loss rate of 0.046 91g/s in the combustion process,which was significantly improved compared with the coating containing unmodified flame retardant.更多还原