焦磷酸哌嗪/壳聚糖膨胀阻燃聚丙烯制备及性能研究  

Preparation and properties of pyrophosphate piperazine/chitosan intumescent flame retardant polypropylene

作　　者：李明[1] 欧红香[1] 冉镒柠 薛洪来 朱方[1] LI Ming;OU Hongxiang;RAN Yining;XUE Honglai;ZHU Fang(School of Safety Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学安全科学与工程学院,江苏常州213164

出　　处：《功能材料》2024年第10期10165-10171,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(No.22378028,No.21878026);江苏省高等学校基础科学(自然科学)研究面上项目(2KJB620002);常州大学教育教学研究重点课题(GJY2021005)。

摘　　要：采用焦磷酸哌嗪(PAPP)和壳聚糖(CS)复配构建环保膨胀阻燃剂、经熔融共混制备膨胀阻燃聚丙烯复合材料(IFR/PP)。通过氧指数、锥形量热仪、热重分析、力学性能测试等研究IFR/PP的阻燃性能及机理。结果表明,膨胀阻燃剂的总添加量为30%(质量分数),PAPP与CS质量比为5∶1时,IFR/PP的LOI值为35.5%,UL-94达到V-0级别,800℃时的残留物为13.34%,热释放速率峰值(pHRR)由纯聚丙烯的1345.01 kW/m^(2)降至83.04 kW/m^(2),拉伸强度降低了39.9%。残炭SEM测试结果表明CS的加入促进了膨胀炭层的形成,材料燃烧形成更致密且均匀的炭层,提高了阻燃性能和抑烟能力。PAPP与CS具有良好的协效阻燃作用。The environmental-friendly intumescent flame retardant was constructed by the combination of piperazine pyrophosphate(PAPP)and chitosan(CS).The intumescent flame retardant polypropylene composites(IFR/PP)were prepared by melt blending.The flame retardants properties and mechanisms of IFR/PP were studied by methods such as oxygen index,cone calorimeter,thermogravimetric analysis and mechanical properties test.The results showed that when the total amount of expansion flame retardant was 30wt%,and the mass ratio of PAPP to CS was 5∶1,the LOI value of IFR/PP was 35.5%,and UL-94 reached V-0 grade.The residue at 800℃was 13.34wt%,the peak heat release rate(pHRR)was reduced from 1345.01 kW/m^(2)to 83.04 kW/m^(2),and the tensile strength was reduced by 39.9%.The SEM test results of residual carbon showed that the addition of CS promoted the formation of an expanded carbon layer,resulting in a denser and more uniform carbon layer during material combustion,which improved flame retardant property and smoke suppression ability.PAPP and CS have a good synergistic flame retardant effect.

关 键 词：聚丙烯 焦磷酸哌嗪 壳聚糖 阻燃性能 力学性能 

分 类 号：X937[环境科学与工程—安全科学] TQ322[化学工程—合成树脂塑料工业]