摘要
用硅烷偶联剂对氢氧化镁(MH)进行表面处理,以MH和纳米二氧化硅(SiO_2)对线型低密度聚乙烯(LLDPE)进行阻燃改性。采用万能材料试验机测定了LLDPE/MH/SiO_2复合材料的力学性能,并用DSC表征了其结晶行为;用氧指数法、垂直燃烧试验和锥形量热仪对其阻燃性能和燃烧特性进行了测试。结果表明:少量纳米SiO_2的加入能抑制LLDPE的高温裂解,可提高其氧指数和垂直燃烧性能,降低火灾的危险性;而对其力学性能和结晶行为的影响不十分明显,是MH的有效协效剂。
The magnesium hydroxide（MH） was treated with silane coupling agent,and the linear low density polyethylene（LLDPE） was modified by MH flame retardant and nano-silica（SiO_2）.The mechanical properties of LLDPE/MH/SiO_2 composites were measured by using a universal material testing machine,and the crystallization behavior of the composites was characterized by DSC.Flame retardancy and combustion characteristics were tested by oxygen index,vertical combustion test and cone calorimeter.The addition of a small amount of SiO_2 can inhibit the pyrolysis of LLDPE,which can improve the oxygen index and vertical combustion performance and reduce the risk of fire.The effect of SiO_2 on the mechanical properties and crystallization behavior is not obvious,which is an effective synergist for MH.
作者
杨再军
王伟铃
罗筑
Yang Zaijun Wang Weiling Luo Zhu(College of Materials and Science Metallurgy Engineering,Guizhou University,Guiyang 550003,China National Engineering Research Center for Compounding and Modification of Polymeric Materials,Guiyang 550014,China)
出处
《塑料科技》
CAS
北大核心
2017年第2期45-49,共5页
Plastics Science and Technology
关键词
氢氧化镁
纳米氧化硅
线型低密度聚乙烯
阻燃性能
力学性能
Magnesium hydroxide
Nano-silica
Linear low density polyethylene
Flame retardancy
Mechanical properties
