中国塑料

中国塑料 ›› 2010, Vol. 24 ›› Issue (03): 101-104 .DOI: 10.19491/j.issn.1001-9278.2010.03.021

• 标准与测试 • 上一篇    下一篇

热重-质谱联用对膨胀型阻燃剂阻燃EVA的机理研究

徐建中 时佳 谢吉星 焦运红 孙 赟   

  1. 河北大学
  • 收稿日期:2009-11-11 修回日期:2009-12-27 出版日期:2010-03-26 发布日期:2010-03-26

Study of Flame-retarding Mechanism on EVA Treated with Intumescent Flame Retardant by TG-MS

Jianzhong XU Jia SHI Jixing XIE Yunhong JIAO Yun SUN   

  • Received:2009-11-11 Revised:2009-12-27 Online:2010-03-26 Published:2010-03-26
  • Contact: Jianzhong XU

摘要： 采用极限氧指数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（APP/PER/MCA/ EVA）的阻燃及力学性能，并采用热重-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。

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

Abstract: The flame retardant and mechanical properties of intumescent flame retardant system（APP/PER/MCA/EVA）was investigated using limited oxygen index and tensile testing instruments, and its thermal degradation process under air atmosphere was studied by TG-MS. With a total loading of APP/PER/MCA (8/4/3) of 40wt %, EVA gave a limited oxygen index of 26 % and a tensile strength of 6.62 MPa. The initial decomposing temperature and weight loss of modified EVA decreased 100 ℃和10 %, respectively, compared with neat EVA. In addition, the fillers decreased remarkably the heat absorption, changed the composition of the thermal degradation products especially benzene was decreased obviously.

Key words: thermogravimetr-mass spectroscopy, ethylene-vinyl-acetate copolymer, intumescent flame retardant, thermal degradation

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