摘要
为使得乙烯-醋酸乙烯酯共聚物(EVA)泡沫复合材料具有阻燃功能,分别添加膨胀石墨-聚磷酸铵(EGAPP)和膨胀石墨-聚磷酸铵-热塑性淀粉(EG-APP-TPS)两种不同复配阻燃剂,通过熔融共混和硫化发泡制备了无卤阻燃EVA泡沫复合材料。采用极限氧指数(LOI)、垂直燃烧(UL-94)、热分析质谱联用(TG-MASS)及扫描电镜(SEM)测试等对EG-APP/EVA及EG-APP-TPS/EVA泡沫复合材料进行表征。结果表明:EG-APP复配阻燃剂添加量为30wt%、EG与APP质量比为1∶4时,EG-APP/EVA泡沫复合材料的LOI达28.1%,UL-94为V-1级;而当EG-APP-TPS复配阻燃剂添加量同为30wt%,EG、APP与TPS质量比为1∶4∶1时,EG-APP-TPS/EVA泡沫复合材料的LOI可达29.3%,UL-94为V-0级。TG-MASS和SEM分析表明:EG、APP和TPS在气相和固相中均具有显著的协同阻燃作用。
In order to obtain retardant ethylene-vinyl acetate(EVA)foam composites,two different compounded fire retardant consisting of expandable graphite-ammonium polyphosphate(EG-APP)and expandable graphite-ammonium polyphosphate-thermoplastic starch(EG-APP-TPS)were added to prepare alogen-free fire retardant EVA foam composites by process of molten blending and sulfuration foam.The EG-APP/EVA and EG-APP-TPS/EVA foam composites were characterized by limit oxygen index(LOI),vertical combustion(UL-94),thermal analysis mass spectrometry(TG-MASS)and scanning electron microscopy(SEM)test.The results demonstrate that the LOI of EG-APP/EVA foam composite is 28.1%and the flame retardant grade reaches to UL-94V-1at 30wt%total loading of EG and APP with mass ratio of 1∶4.However,at 30wt%total loading of EG,APP and TPS with mass ratio of 1∶4∶1,LOI 29.3%and UL-94V-0rating are obtained.The results from TG-MASS and SEM tests show agood synergistic effect of EG,APP and TPS in solid and gas phase.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2015年第3期649-656,共8页
Acta Materiae Compositae Sinica
基金
福建省高校产学合作科技重大项目(2012H6008)
福州市科技计划(2013-G-92)
关键词
乙烯-醋酸乙烯酯共聚物
泡沫
复合材料
膨胀石墨
聚磷酸铵
热塑性淀粉
阻燃性能
ethylene-vinyl acetate copolymer
foams
composites
expandable graphite
ammonium polyphosphate
thermoplastic starch
flame retardancy
