聚碳酸酯阻燃测试方法结果分析  

Analysis of flame-retardant test results of polycarbonate

作　　者：刘述梅[1] 蒋智杰[1] 赵建青[1] 叶华[1] 

机构地区：[1]华南理工大学材料科学与工程学院

出　　处：《功能材料》2007年第10期1734-1737,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20574020);教育部重点实验室开放资助课题(20061001)

摘　　要：采用氧指数法、垂直燃烧法、锥形量热仪法对二苯基砜磺酸钾(KSS)、聚偏氟乙烯(PVDF)、聚氨丙基苯基倍半硅氧烷(PAPSQ)三元复合改性聚碳酸酯(PC)的阻燃性进行表征。结果表明在三者用量分别为0.1%、0.3%、0.3%时,改性PC的极限氧指数(LOI)达38.8%、阻燃等级通过UL94V-0@1.6mm,锥形量热燃烧参数方面有效燃烧热峰值(PEHC)比纯PC降低11.5%、点燃时间延长8s,而释热速率(HRR)却高10%左右,不同的测试方法得出的阻燃性能结果存在较大差异。采用FTIR分析LOI和锥形量热燃烧炭层发现前者为高度交联的芳香化合物结构,而后者PC燃烧彻底,PAPSQ迁移至表面燃烧生成SiO2。The flame retardancy of bisphenol A polycarbonate （PC） containing potassium diphenylsulfone sulfonate （KSS）, poly （vinylidenefluoride） （PVDF） and poly （aminopropyl/phenylsilsesquioxane） （PAPSQ） was measured by limited oxygen index （LOI）, UL94 rate and the cone calorimeter. The flame-retarded PC with 38. 8% LOI and UL94 V-0 rating for 1.6 mm thickness was obtained by a combined use of 0. 1 % KSS, 0. 3% PVDF and 0.3 %PAPSQ. Compared with pure PC, peak effective heat of combustion （PEHC） of the flame-retarded PC reduced by 11.50%, ignition time prolonged 8 s, which showed improved flame-retardance, and heat release rate（HRR）increased by approximately 10%, indicating improved combustibility. Different flame-retard- ant results of the flame-retarded PC were obtained by using different flame-retardant test methods. A highly cross-linking aromatic char barrier on the surface was formed under LOI measurement condition, and PAPSQ moved to the surface to form SiO2 under cone test condition.

关 键 词：聚碳酸酯 阻燃等级 释热速率 炭层 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]