摘要
采用极限氧指数、热重分析(TG)和差示扫描量热分析(DSC)等技术和手段研究了乙烯-丙烯酸丁酯共聚物(EBA)/氢氧化铝(ATH)复合材料的阻燃性能和热降解行为,探讨了 ATH 的添加量对 EBA 力学性能和熔体流动速率的影响。实验数据表明,ATH 的引入能恶化材料的力学性能和加工性能;但可提高材料的阻燃性能,当 ATH 的添加量为60%时,阻燃材料的极限氧指数可达33.1%。ATH 提高了 EBA 在高温下的热稳定性,降低了 EBA 的热降解速率,扩大了热失重温度范围。ATH 以吸热方式在凝缩相和气相中发挥阻燃作用;此外,ATH 分解形成的活性Al_2O_3对 EBA 还具有成炭催化作用,在一定程度上显示出了 ATH 的凝缩相阻燃作用。
The flame retardancy of aluminum trihydrate （ATH） for the ethylene-butyl acrylate copolymer （EBA） was investigated, the thermal and mechanical properties of the compound system were studied. The limiting oxygen index value of EBA was increased from 17.8 % to 33.1% with 60 wt% loading of ATH. ATH decreased the thermal decomposition rate, and broadened the range of thermal decomposition temperature. The flame retardant action of ATH in EBA was via heat sink in both the gaseous and condensed phases. However, the reactive alumina （a Lewis acid） formed as the ATH lost water catalyzed the degradation of EBA, leading to higher char yield. Another negative effect of ATH was the deterioration of the mechanical and processing properties of EBA.
出处
《中国塑料》
CAS
CSCD
北大核心
2006年第12期65-68,共4页
China Plastics
关键词
乙烯-丙烯酸丁酯共聚物
氯氧化铝
阻燃
热降解
ethylene-butyl acrylate copolymer
aluminum trihydrate
flame retardant
thermal degradation
