一种新型含硅阻燃剂的制备及在聚碳酸酯中的应用研究  

Study on Preparation of A Novel Silicon-containing Flame Retardant and Its Application in Polycarbonate

作　　者：单佳丽[1] 宋荣君[1] 李斌[1] 

机构地区：[1]东北林业大学理学院黑龙江省阻燃材料分子设计与制备重点实验室,黑龙江哈尔滨150040

出　　处：《塑料科技》2016年第4期90-94,共5页Plastics Science and Technology

摘　　要：利用低含氢硅油对纳米二氧化硅(NS)进行表面处理,制备了一种新型含硅阻燃剂(STNS),并将其用于聚碳酸酯(PC)的阻燃。采用傅里叶变换红外光谱(FTIR)、极限氧指数(LOI)、垂直燃烧(UL 94)、力学性能测试以及扫描电镜(SEM)、热重分析(TG)等手段研究了阻燃剂STNS的结构及其对PC阻燃性能和热稳定性的影响,同时分析了STNS对PC的作用机理,并考察了STNS在PC中的分散性及其对PC力学性能的影响。结果表明:阻燃剂STNS在高温下能促进PC交联,从而有效提高PC的阻燃性能和热稳定性。另外,适量STNS的添加能够有效改善阻燃PC的韧性,其中当STNS用量为7%时,阻燃PC的冲击强度和断裂伸长率分别提高了89.9%和108.7%,但其弯曲强度和拉伸强度则分别下降了2.7%和0.7%。A novel silicone-containing flame retardant（STNS） used for polycarbonate（PC） was obtained by the surface treatment of nano-sized silica with hydrogen-containing silicone oil. Fouriertransform infrared spectroscopy（FTIR）, limiting oxygen index（LOI）, vertical burning tests（UL 94）, mechanics performance tests, scanning electronic microscopy（SEM） and thermogravimetry analysis（TG） were used to investigate the structure of the flame retardant STNS and its flame retardancy and thermal stabilization effects on PC, and the interaction mechanism between STNS and PC is also analyzed, in addition, the dispersion of STNS in PC and the effects of STNS on the mechanical properties of PC were studied. The results demonstrate that, the incorporation of STNS can effectively improve the flame retardancy and thermal stability of PC, by promoting the crosslinking of PC at high temperature. Moreover, addition of an appropriate amount of STNS can obviously increase the toughness of the flame retarded PC. When the STNS content is 7%, the impact strength and elongation at break of the flame retarded PC increase by 89.9% and 108.7%, but the bending strength and tensile strength decrease by 2.7% and 0.7% respectively.

关 键 词：聚碳酸酯 含氢硅油 纳米二氧化硅 阻燃性能 热稳定性 力学性能 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]