OMMT对溴-锑阻燃体系成炭性能的影响  

Effects of OMMT on the Char Formation Property of Bromine-antimony Flame-Retardant System

作　　者：左晓玲[1] 邵会菊[1] 张道海[1] 吴斌 郝智[1] 郭建兵[1] 

机构地区：[1]贵州大学材料与冶金学院国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [2]贵州凯科特材料有限公司,贵州贵阳550014

出　　处：《塑料工业》2013年第10期93-97,共5页China Plastics Industry

基　　金：贵州省重大专项[(2011)6018];贵州省科技计划(黔科合GY字[2013]3026);贵州大学创新基金(研理工2013067)

摘　　要：利用有机蒙脱土(OMMT)协同溴代环氧树脂(BER)、三氧化二锑(Sb2O3)制备OMMT-溴-锑阻燃长玻纤增强尼龙6复合材料(OMMT/FR/LGF/PA6)与溴-锑阻燃长玻纤增强尼龙6复合材料(FR/LGF/PA6)对比,通过极限氧指数(LOI)、垂直燃烧(UL94)、锥形量热分析(CONE)、红外光谱分析(FTIR)、扫描电镜(SEM)等方法研究了OMMT协同溴-锑对长玻纤增强尼龙6复合材料成炭性能影响。结果表明,在OMMT添加量为3%,BER与Sb2O3的添加量为9%时,可使OMMT/FR/LGF/PA6复合材料的阻燃等级达到FV-0级,LOI为25.8%,与BER与Sb2O3添加量为12%时,FR/LGF/PA6的阻燃等级一致,且LOI仅为23.9%。锥形量热分析表明,OMMT能促进溴-锑阻燃体系燃烧后的成炭率,红外光谱分析表明,该炭层能保留尼龙6与蒙脱土的基本结构,但是OMMT-溴-锑阻燃体系燃烧后生成的炭层质量并不高,并易生成具有絮状结构的蓬松炭层,故LOI增加幅度并不大。Long-glass-fiber reinforced polyamide 6 composites were flame retarded with OMMT-bromine- antimony fame retardant system containing organic montmorillonite （OMMT） synchronized with brominated epoxy resins （BER） and antimony trioxide （Sb203 ）. The effects of OMMT on char formation property of bromine-antimony flame retarded long-glass-fiber reinforced polyamide 6 such as limited oxygen index （LOI） measurements, UL-94, Fourier transform infrared spectra （FT-IR） cone tests and scanning electronic microscopy （SEM） were studied. The results demonstrated that LOI value and UL-94 rating of FR/LGF/ PA6 composites reached 25.8 and FV-0, respectively, for the samples containing 3 wt% OMMT synchronized with 9 wt% BER and Sb203, which had the same flame-retardant rating with the samples containing 12 wt% BER and Sb2 O, and the LOI value is only 23.9%. The CONE showed that OMMT could promote the reaction of PA6 decomposed to form residue char of bromine-antimony flame-retardant system after combustion, bl＇-IR showed that this kind of residua char layer remained the basic structure of polyamide 6 and montmorillonite. However, the residua char produced by OMMT-bromine-antimony flame-retardant system hadn＇ t a highly perfect structure, and easy to generate the fluffy char layer with flocculent structure, as a result, the LOI value increased with a limited range.

关 键 词：长玻纤增强尼龙6 有机蒙脱土 溴-锑阻燃体系 烛芯效应 成炭性能 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]