摘要
通过全水发泡技术制备硬质聚氨酯泡沫/三聚氰胺聚磷酸盐(RPUF/MPP)复合材料,并对其泡孔形貌、热稳定性、阻燃性能、烟释放特性进行研究,结果表明,RPUF/MPP复合材料初始分解温度与纯样相比,升高了18~26℃,热稳定性明显提升;50份MPP使复合材料极限氧指数达到24.4%,垂直燃烧达到UL 94 V-0级。RPUF/MPP50热释放速率峰值和总热释放仅为139 W/g和16.7 kJ/g,与纯样相比,分别降低了32.5%和28.3%。经过MPP改性,RPUF/MPP50最大烟密度及烟密度等级分别降低至32.10%和19.56。炭渣分析表明,MPP可以有效促进RPUF/MPP复合材料燃烧过程中致密炭层的形成,且炭层中石墨化成分比例明显提高,有利于其阻燃性能的提升。研究表明,MPP可以显著提升硬质聚氨酯泡沫火灾安全性能。
Rigid polyurethane foam/melamine polyphosphate composite(RPUF/MPP) composite were prepared by one-step all-water blowning method,and cell morphology,thermal stability,fire retardancy as well as smoke release performance of the composite were investigated.It was observed that RPUF/MPP composite exhibited degradation temperature 18~26 ℃ higher than that of unmodified sample with significantly enhanced thermal stability.The composite with 50 phr of MPP loading was endowed LOI of 24.4% and V-0 rating in UL 94 test.RPUF/MPP50 were observed PHRR and THR value of only 139 W/g and 16.7 kJ/g,which were 32.5% and 28.3% lower than those of pure RPUF.With the modification of MPP,MSD and SDR values of RPUF/MPP50 were decreased to 32.10% and 19.56,respectively.It was confirmed from char residue investigation that the incorporation of MPP could effectively enhance the formation of compact char residue of RPUF/MPP composite in combustion with enhanced graphitization composition,thus increasing fire retardancy of the composite.This work implied that MPP could significantly enhance fire safety of rigid polyurethane foam.
作者
郑玉莹
赵园园
谢伟
王秋分
ZHENG Yuying;ZHAO Yuanyuan;XIE Wei;WANG Qiufen(Xuhai College,China University of Mining and Technology,Xuzhou,Jiangsu 221000,China;Xuzhou University of Technology,Xuzhou,Jiangsu 221000,China)
出处
《塑料》
CAS
CSCD
北大核心
2023年第4期7-12,共6页
Plastics
基金
江苏省高等学校基础科学(自然科学)面上项目(21KJB560019)。
