羟基锡酸锌包覆埃洛石对PVC/ABS共混物阻燃性能的影响  

Influence of Halloysite Nanotubes Coated with Zinc Hydroxystannate on the Flammability of PVC/ABS Blends

作　　者：苍琼 李锦春[1] 任强[1] 邹国享[1] 宋艳[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164

出　　处：《高分子材料科学与工程》2015年第1期88-92,97,共6页Polymer Materials Science & Engineering

基　　金：江苏省产学研前瞻性联合研究项目(BY2012101)

摘　　要：采用均匀沉淀法制备了羟基锡酸锌(ZnSn(OH)6)包覆埃洛石纳米管(C-HNTs)。利用X射线衍射仪、透射电子显微镜分析了ZnSn(OH)6与HNTs的质量比对包覆物体相结构的影响。结果表明,当ZnSn(OH)6与HNTs的质量比为1∶10时,ZnSn(OH)6能够较均匀地包覆于HNTs的表面。利用氧指数测试仪、锥形量热仪、热重分析仪研究了CHNTs对聚氯乙烯(PVC)/苯乙烯-丙烯腈-丁二烯共聚物(ABS)共混物的阻燃性能和热稳定性的影响。结果表明,CHNTs能明显改善PVC/ABS共混物的阻燃和抑烟性能,其极限氧指数达到36%,发烟速率仅为PVC/ABS共混物的51%。添加4phr C-HNTs后的PVC/ABS共混物在850℃的炭残余量提高了14.06%,而对力学性能影响不大。Halloysite nanotubes(HNTs)coated with zinc hydroxystannate(ZnSn(OH)6)(C-HNTs)was synthesized by homogeneous precipitation technique.The results of transmission electron microscopy(TEM)and X-ray diffraction(XRD)analysis show that HNTs can be uniformly coated with ZnSn(OH)6 when m(ZnSn(OH)6)∶m(HNTs)=1∶10.The effects of C-HNTs on the flame retardant properties and thermal stability of PVC/ABS blends were investigated by the oxygen index testing,cone calorimeter instrument(CONE)and thermogravimetric analysis(TGA).The results indicate that the flame retardance and smoke suppression properties of PVC/ABS blends filled with C-HNTs are improved.Limited oxygen index(LOI)is increased to 36%and smoke production rate is decreased by 51%.By adding 4phr C-HNTs,the charring residue at 850 ℃for PVC/ABS blends is increased by 14.06%.It is also found that with the content of C-HNTs increasing,the tensile strength of the PVC/ABS blends decreases,while its elongation at break and impact strength increase first,and then decrease.

关 键 词：埃洛石纳米管 羟基锡酸锌 阻燃性能 热稳定性 

分 类 号：TQ317[化学工程—高聚物工业]