摘要
以二乙基次膦酸铝(ADP)为协效剂,与聚磷酸铵(APP)/季戊四醇(PER)传统膨胀型阻燃体系复配,通过熔融共混制备了膨胀阻燃聚丙烯(PP)。采用极限氧指数(LOI)、垂直燃烧测试、锥形量热仪、扫描电子显微镜和热重分析研究了阻燃PP的性能及相关作用机制。结果表明,ADP和APP/PER具有很好的协同阻燃作用,它不但可以同时提高阻燃体系的残炭量和炭层质量,有效抑制熔滴,还可以降低燃烧过程中的生烟量,是更加绿色的阻燃体系。当阻燃体系的总添加量为24%,APP/PER和ADP的质量比为6∶1时,阻燃PP的LOI可达到29.8%,垂直燃烧等级为V–0级,且生烟性比不添加ADP的体系下降了76.9%。阻燃机理研究表明,该体系是以凝聚相为主的凝聚相和气相协同阻燃机制。
Intumescent flame retardant polypropylene (PP) was prepared by melt blending with aluminum diethylphosphinate (ADP) as a synergist and compounded with the traditional intumescent flame retardant system of ammonium polyphosphate (APP)/ pentaerythritol (PER). The properties and retardant mechanism of the flame PP were studied by the limit oxygen index (LOI),the vertical burning test,cone calorimeter,scanning electron microscope and thermogravimetric analyser. The results show that ADP and APP/PER has a good synergistic flame retardant effect,which can not only improve the carbon residue and carbon layer quality of the flame retardant system,but also effectively inhibiting the melting droplets and reducing the amount of smoke generated in the combustion. It is a greener flame retardant system. When the mass ratio of APP/PER and ADP is 6∶1,and the flame retardant system total additive content is 24%,the LOI of flame retardant PP is 29.8%,the vertical combustion reachs V–0 grade,and the smoke generation is 76.9% lower than that of the system without ADP. The study of flame retardant mechanism shows that the system is dominated by condensed phase flame-retardant mechanism and accompanying simultaneously gas phase flame-retardant mechanism.
作者
鲁哲宏
李豪
任艳蓉
刘保英
房晓敏
丁涛
Lu Zhehong;Li Hao;Ren Yanrong;Liu Baoying;Fang Xiaomin(Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China;Henan Engineering Laboratory of Flame Retardant and Functional Materials, Kaifeng 475004, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2019年第1期138-142,共5页
Engineering Plastics Application
基金
国家自然科学基金项目(51403051)
河南省科技发展计划项目(162102210023
162300410018)
河南省高等学校重点科研项目(16A150003
15A150041)
关键词
聚丙烯
阻燃
二乙基次膦酸铝
聚磷酸铵
季戊四醇
协效作用
polypropylene
flame retardancy
aluminum diethylphosphite
ammonium polyphosphate
pentaerythritol
synergistic effect
