摘要
以二氯磷酸苯酯(PDCP)、乙二醇(EG)、甲醇、甲基丙烯酸-β羟乙酯(HEMA)为原料,经逐步聚合得到端乙烯基低聚磷酸酯的磷元素杂化大单体(VOPP),VOPP与苯乙烯(St)通过接枝共聚制备磷元素杂化大单体接枝聚苯乙烯共聚物(VOPP-co-St)。利用FTIR和凝胶渗透色谱(GPC)表征VOPP的结构及平均分子量,通过TGA、氧指数测定仪和微型量热仪研究VOPP-co-St的热稳定性及阻燃性能,SEM和XPS表征炭层形貌及成分,利用Flynn-Wall-Ozawa(FWO)法计算VOPP-co-St的热降解活化能(Ea)。结果表明,随着VOPP含量的增加,VOPP-co-St的最大分解速率温度升高,残重率提高,极限氧指数(LOI)上升,热释放速率峰值(PHRR)降低,总热释放量(THR)减小,熔滴现象消失,Ea随降解转化率增大而增大。
The vinyl-terminated oligophosphate hybrid monomer （VOPP） was synthesized by step-reaction poly- merization using phenyl dichlorophosphate （PDCP）, ethylene glycol（EG）, methanol, hydroxyethyl methylacrylate （HEMA）, VOPP and styrene （St） by graft copolymerization preparation of phosphorus element of hybrid monomer grafted polystyrene copolymer （VOPP-co-St）. The structural characteristics and average molecular weight of VOPP were explored by FTIR and gel permeation chromatography（GPC）. The thermal stability and flame-retardant prop- erties of the VOPP-co-St were evaluated by TGA, limit oxygen index（LOI） and microscale combustion calorimeter- The morphology and composition of the char layer were investigated by SEM and XPS. The thermal decomposition activation energy（E-） of VOPP-co-St was calculated by Flynn-Wall-Ozawa（FWO） method. The results show that the temperature of maximum decomposition rate, residual mass and LO! of VOPP-co-St increase with the increase of VOPP content, peak heat release rate（PHRR） and total heat release（THR） reduce with the increase of VOPP con- tent, and droplet phenomenon disappeare, while Ea increases with the increase of degradation conversion rate.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2017年第10期2141-2149,共9页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51465036)
甘肃省青年科技基金(1506RJYA089)
关键词
元素杂化
低聚磷酸酯
大单体
接枝共聚
聚苯乙烯
阻燃性能
element hybrid
oligomeric phosphate
macromer
graft copolymerization
polystyrene
flame retard-ant performance
