簇状羟基锡酸锶的合成及对软聚氯乙烯的阻燃消烟作用  

Synthesis of Cluster-Shaped Strontium Hydroxystannate and Its Flame Retardant and Smoke Suppressant Effect for Flexible Poly( vinyl chloride)

作　　者：焦运红[1] 王谦[1] 陈金杰[1] 吴静[1] 时玲[1] 徐建中[1] 

机构地区：[1]河北省阻燃材料与加工技术工程技术研究中心河北大学化学与环境科学学院,河北保定071002

出　　处：《高分子材料科学与工程》2017年第3期48-52,58,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21276059);河北省自然科学基金青年基金资助项目(B2014201101)

摘　　要：以锡酸钠和硝酸锶为原料,制备了花簇状羟基锡酸锶(SrSn(OH)_6);将其添加到软聚氯乙烯(PVC)中,采用极限氧指数仪、烟密度等级测试仪、拉伸仪和热重分析仪研究了其对软PVC的阻燃、抑烟、拉伸和热降解性能的影响,并通过能谱分析、X射线衍射和扫描电镜对烟密度等级测试后残炭的组成及形貌进行表征。结果表明,SrSn(OH)_6对软PVC具有较好的阻燃和抑烟性能,对其拉伸性能的影响较小;当其添加量为10 g/100 g PVC时,其对应的阻燃软PVC具有最好的阻燃、消烟和拉伸性能;SrSn(OH)_6能促使软PVC燃烧时迅速脱出HCl并交联形成内部具有封闭孔的,外表面致密的膨胀炭层。Cluster-shaped strontium hydroxystannate （SrSn（OH） 6 ） was synthesized using Sr（NO3 ） 2 and Na2SnO3 as materials; SrSn（OH）6 was added into flexible poly （vinyl chloride） （PVC） matrix, and its flame retardant, smoke suppressant, tensile properties and thermal degradation properties on flexible PVC were tested by limiting oxygen index （LOI） instrument, smoke density rating （SDR） testing instrument, universal tensile testing machine and thermal gravimetric analyzer （TG）, moreover, the char composition and morphology obtained after SDR test for the blank PVC and flame retardant PVC samples were characterized by energy dispersive spectrometer （EDS）, XRD and SEM. The results indicate that SrSn（OH）6 shows a good flame retardant, smoke suppressant properties, and a little bad effect on the tensile property of flexible PVC; when the loading level is 10g/100g PVC, SrSn（OH）6 flame retardant PVC takes on the best flame retardant, smoke suppressant and tensile properties; SrSn（OH）6 could enables soft PVC burning off HCl quickly and erosslinking, then promote formation of a compact intumescent char layer with internal-close holes.

关 键 词：羟基锡酸锶 聚氯乙烯 阻燃 簇状 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]