氢氧化镁阻燃聚苯并噁嗪  

Flame Retardancy of Magnesium Hydroxide in Benzoxazine

作　　者：凌鸿[1] 顾宜[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2013年第7期76-79,共4页Polymer Materials Science & Engineering

摘　　要：采用锥形量热测试和垂直燃烧法UL-94研究了氢氧化镁对苯并噁嗪树脂阻燃性能的影响。结果表明,加入氢氧化镁后苯并噁嗪树脂的垂直燃烧时间缩短,阻燃性提高,当氢氧化镁加入量大于等于20%时,阻燃性达到UL-94V0级。锥形量热的测试结果表明,加入20%氢氧化镁后,聚苯并噁嗪的引燃时间由33s延长至52s;热释放速率的最大值由635.4kW/m2降低至255.93kW/m2;总释热量由99.1MJ/m2降低为67.72MJ/m2;总烟释放量由2578.5m2/m2降低至1686.19m2/m2。对于苯并噁嗪树脂而言,氢氧化镁是一类既阻燃又抑烟的环境友好型阻燃剂。The flame retardancy properties of magnesium hydroxide （MH） in benzoxazine were investigated by cone calorimeter and UL-94 vertical burning test. The results indicate that, in UL-94 test, burning time shortens and flame retardancy of polybenzoxazine is improved after the addition of magnesium hydroxide. When the amount of MH is equal to or greater than 20 % in the benzoxazine resin, V-0 rating can be achieved. The cone calorimeter test reveals that, with the addition of 20 % MH, time to ignition （TTI） increases from 33s to 52s, peak heat release rate （PHRR） decreases from 635.4 kW/m2 to 255.93 kW/m2, total heat release （THR） reduced from 99.1 MJ/m2 to 67.72 MJ/m2, total smoke release （TSR） decreases from 2578.5 m2/m2 to 1686.19 m2/m2. For benzoxazine, magnesium hydroxide is a kind of environment friendly flame retardant and smoke suppressant.

关 键 词：苯并噁嗪 氢氧化镁 阻燃 锥形量热 

分 类 号：TQ322.41[化学工程—合成树脂塑料工业]