摘要
以二氯磷酸苯酯(PDCP)、硼酸双甘油酯(DGB)为原料,通过逐步聚合得到磷-硼杂化聚合物(PDCPDGB),PDCP-DGB与环氧树脂共混体系经交联固化制备磷硼元素共杂化环氧树脂基(PDCP-DGB/EP)阻燃复合材料。利用FTIR、核磁共振波谱仪(NMR)、凝胶渗透色谱仪(GPC)、TG、氧指数(LOI)测定仪、微型量热仪、SEM和XPS对PDCP-DGB和PDCP-DGB/EP复合材料进行表征。结果表明,随着PDCP-DGB质量分数的增加,PDCP-DGB/EP复合材料最大分解速率温度升高,残重率提高,LOI上升,烟密度等级和最大烟密度降低,热释放速率峰值(PHRR)降低,总热释放量(THR)减小;PDCP-DGB有利于提高PDCP-DGB/EP复合材料的热稳定性能和阻燃性能,但对其力学性能影响较小;当PDCP-DGB质量分数为15wt%时,PDCP-DGB/EP复合材料LOI达到28.3%,较纯EP提高了47.4%,垂直燃烧(UL-94)等级达到V-0级;THR、PHRR分别降低了28%、23%,残炭率升高了5.11%;SEM图像显示,PDCP-DGB/EP复合材料的残炭表面得到很好的改善,致密、连续且平整。
A containing phosphorus-boron hybrid polymer(PDCP-DGB)was synthesized by step-reaction polymerization using phenyl dichlorophosphate(PDCP)and boric diglyceride(DGB)as the raw materials.A series of PDCP-DGB/epoxy resin(EP)flame retardant composites were prepared by crosslinking and curing between PDCPDGB and EP blends.The structure of PDCP-DGB was characterized by FTIR and nuclear magnetic resonance.The PDCP-DGB/EP composites were investigated by gel permeation chromatography(GPC),TG,limit oxygen index(LOI),microscale combustion calorimeter,SEM and XPS.The results indicate that with the increase of mass fraction of PDCP-DGB,the temperature of maximum decomposition rate of PDCP-DGB/EP composite,the residual mass rate and the LOI improve,but the smoke density level,maximum smoke density,peak value of heat release rate(PHRR)and total heat release(THR)decrease.PDCP-DGB is conducive to improve the thermal stability and flame retardant properties of PDCP-DGB/EP composite and has little influence on the mechanical properties of PDCP-DGB/EP composites.When the mass fraction of PDCP-DGB reaches 15 wt%,the LOI reaches 28.3%,which is 47.4% higher than that of the pure EP,the vertical burning(UL-94)reaches V-0 level,the THR and PHRR decrease by 28%and 23%,respectively,the residual mass rate increases by 5.11%.SEM images show thatthe carbon residue surface of PDCP-DGB/EP composites is well improved,which is dense,continuous and smooth.
作者
崔锦峰
王文华
郭永亮
郭军红
李维虎
杨保平
CUI Jinfeng;WANG Wenhua;GUO Yongliang;GUO Junhong;LI Weihu;YANG Baoping(Petrochemistry College,Lanzhou University of Technology,Lanzhou 730050,China;Scisky Chenmical Co.,Lanzhou 730030,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2019年第1期28-38,共11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
磷硼共杂化
聚合物
环氧树脂
复合材料:热学性能
阻燃性能
phosphorus boron co-hybrid
polymer
epoxy resin
composite materials
thermal properties
flame retardant performance
