摘要
以氢氧化镁(MDH)作乙烯-乙酸乙烯酯橡胶(EVM)/丁腈橡胶(NBR)共混胶的阻燃剂,运用极限氧指数(LOI)法和锥形量热仪,研究了分别并用少量氢氧化铝(ATH)和硼酸锌对共混胶阻燃性能的影响。结果表明,当添加相同份数的阻燃剂时,MDH与ATH并用和单独使用MDH相比,共混胶的LOI相差不大,但并用少量ATH可以明显延长点燃时间,降低总释放热。添加硼酸锌后,EVM/NBR/MDH体系的阻燃性能提高,添加20份以上硼酸锌,共混胶的点燃时间明显延长,热释放速率峰值明显下降;添加140份MDH时并用20份硼酸锌,共混胶的火灾性能指数最高,阻燃效果最好。
The effects of aluminum hydroxide （ATH） and zinc borate on the flame retardantcy of ethylene-vinyl acetate rubber （ EVM）/nitrile rubber （NBR） blends with magnesium hydroxide （MDH） as flame retardant were investigated by the limiting oxy- gen index（LOI） method and cone calorimeter. The results showed that there was no evident difference of LOI between adding MDH/ATH and MDH in EVM/ NBR blends at the same loading amount flame retard- ants, but adding a small amount of ATH could signif- icantly prolong the ignition time, reduce the totalheat release. Besides, the flame retardancy of EVM/ NBR/MDH system was improved by adding zinc bo- rate, especially at more than 20 phr, the ignition time increased effectively and the heat release rate decreased obviously. So for the EVM/NBR blends, the highest fire performance index and the best flame retardancy were gained when 140 phr MDH and 20 phr zinc borate were added simultaneously.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2012年第5期392-395,共4页
China Synthetic Rubber Industry
基金
德国Lanxess化学有限公司与青岛科技大学橡塑材料与工程教育部重点实验室合作项目(2009 LSQ 0116)
