摘要
采用氧指数测定仪和拉伸仪研究了膨胀阻燃剂阻燃乙烯-醋酸乙烯共聚物(EVA)体系(EVA/APP/PER/MCA)的阻燃及力学性能,并用热重-质谱联用仪对该体系在空气中的热氧化降解进行了分析。结果表明,在APP/PER/MCA的配比为8/4/3、总添加量为40%时,阻燃EVA样品的阻燃和力学性能最好,其极限氧指数和拉伸强度分别为26%和6.62 MPa;与纯EVA相比,膨胀阻燃剂阻燃EVA的起始分解温度和失重率分别降低100℃和10%,吸热量明显降低;阻燃EVA的热氧化降解过程中,H2O、CO2等小分子产物发生明显变化,且阻燃后苯环类化合物明显减少。
The flame retardancy and mechanical properties of intumescent flame retardant retarded system（EVA/APP/PER/MCA）were investigated using limited oxygen index and tensile testing instruments, and its thermal degradation process under air atmosphere was studied by TC-MS. With a total loading of APP/PER/MCA （8/4/3） of 40 wt %, EVA gave a limited oxygen index of 26 % and a tensile strength of 6.62 MPa. The initial decomposing temperature and mass loss of modified EVA decreased 100 ℃ and 10 %, respectively, compared with neat EVA. In addition, the fillers decreased the heat absorption remarkably, changed the composition of the thermal degradation products, especially benzene was reduced obviously.
出处
《中国塑料》
CAS
CSCD
北大核心
2010年第3期101-104,共4页
China Plastics
关键词
热重-质谱联用
乙烯-醋酸乙烯共聚物
膨胀阻燃剂
热氧化降解
thermogravimetry-mass spectroscopy
ethylene vinyl-acetate copolymer
intumescentflame retardant
thermal oxidation degradation
作者简介
联系人，xujz@hbu．edu．cn
