硅改性木质素成炭剂协同膨胀阻燃聚丙烯制备及性能研究  

Study on preparation and properties of silicon modified lignin charring agent synergistic intumescent flame retardant polypropylene

作　　者：戴静 陈伟佳 潘梦丽 欧红香 DAI Jing;CHEN Weijia;PAN Mengli;OU Hongxiang(College of Environmental and Safety Engineering,Changzhou University,Changzhou Jiangsu 213164,China)

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《工业安全与环保》2023年第3期50-54,共5页Industrial Safety and Environmental Protection

基　　金：江苏省研究生科研与实践创新计划项目(KYCX20_2585)。

摘　　要：为提高聚丙烯(PP)的阻燃性能,采用溶胶凝胶法制备膨胀阻燃剂炭源——硅改性木质素(SiO_(2)@AL),与聚磷酸铵(APP)、双季戊四醇(DPER)经熔融共混制备膨胀阻燃PP复合材料。通过氧指数、垂直燃烧、热重分析、烟密度测试等考查复合材料的阻燃、热稳定性、抑烟等性能。结果表明:当添加4%SiO_(2)@AL的PP复合材料UL-94测定达到V-0;而SiO_(2)@AL与DPER的质量比为1∶3时,氧指数最高为27.6%。SiO_(2)@AL/IFR/PP具有良好的高温稳定性能,较传统膨胀阻燃PP的热失重速率降低了1.75%,800℃时残留量增加了0.5倍;烟密度测试和残炭SEM分析表明,SiO_(2)@AL的添加使PP形成了更加稳定的蜂窝状炭层,烟气释放总量呈下降趋势。To improve the flame retardancy of polypropylene(PP),the silicon modified lignin(SiO_(2)@AL)was prepared by sol-gel method as expansion flame retardant carbon source.And the expansion flame retardant PP composite was prepared by melt blending with SiO_(2)@AL,ammonium polyphospphosphate(APP)and dipentaerythritol(DPER).The flame retardancy,thermal stability and smoke suppression of the composites were investigated by oxygen index,vertical combustion,thermogravimetric analysis and smoke density test.The results indicate that:with 4 wt%SiO_(2)@AL,the UL-94 of the PP composite material reach V-0 level.When the mass ratio of SiO_(2)@AL to DPER is 1∶3,the oxygen index is 27.6%.SiO_(2)@AL/IFR/PP has good high temperature stability performance,with 1.75% lower thermal weight loss rate and 0.5 times higher residual amount at 800℃ than traditional intumescent flame retardant PP;smoke density test and residual carbon SEM analysis show that the addition of SiO_(2)@AL makes PP form a more stable honeycomb carbon layer,and the total amount of smoke release shows a decreasing trend.

关 键 词：硅改性木质素 聚丙烯 溶胶凝胶法 热分析 阻燃 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]