热固性钼酚醛树脂的表征及其应用  

Analysis and application of thermosetting molybdic acid-modified phenolic resin

作　　者：强敏[1] 张双庆[1] 林惠珊[1] 陈林[1] 

机构地区：[1]武汉科技大学化工与资源环境学院,武汉430081

出　　处：《耐火材料》2005年第2期119-122,共4页Refractories

摘　　要：为了提高普通热固性酚醛树脂结合耐火材料的中温强度,采用IR和TG-DTA等手段分析了热固性钼酚醛树脂的结构和热性能,然后以热固性钼酚醛树脂作为结合剂制成铝碳砖试样,检测了铝碳砖试样的耐压强度、显气孔率和体积密度。结果表明:钼酚醛树脂是通过钼酸与酚醇中的羟甲基发生酯化反应,使钼以化学键的形式键合于酚醛树脂分子主链中而合成的;热固性钼酚醛树脂在质量损失率、热分解温度和树脂碳氧化温度等方面都比普通热固性酚醛树脂的有所改善,TG曲线在整个温度范围内的下降趋势也较平缓;热固性钼酚醛树脂结合的铝碳砖试样在200℃、500℃和600℃处理后的耐压强度分别比普通热固性酚醛树脂结合的提高了约23.1%、51.2%和70.3%,显气孔率也有所下降,体积密度有所提高。In order to increase the mid-temperature strength of the refractories which was bonded by the conventional phenolic resin (PF), the author analysed constitution and heat performance of Mo-PF according to IR and TG-DTA graph, made Al2O3-C brick with the thermosetting Mo-PF as binder, detected the compressive strength, apparent porosity and bulk density of the bricks. The results indicated that Mo-PF was synthesized by esterified reaction between molybdic acid and hydroxymethyl in phenolic alcohol, in this reaction, the transition metal Mo atom was bonded in the major molecule chains of PF. The mass loss rate, thermo decomposing temperature and the resin carbon oxidation temperature etc of the thermosetting Mo-PF were all improved compared with the conventional thermosetting PF, and the descent trend of its TG graph was smoother in all temperature area. The results of making-bricks experiments illustrated that, at 200°C, 500°C and 600°C, the strength of Al2O3-C brick bonded by Mo-PF was higher than that of common PF bonded brick by percents of 23.1, 51.2, 70.3. The apparent porosity decreased and the bulk density increased at some extent.

关 键 词：钼酚醛树脂 热固性酚醛树脂 应用 表征 树脂结合 耐压强度 体积密度 显气孔率 质量损失率 热分解温度 铝碳砖 耐火材料 酯化反应 氧化温度 温度范围 TG曲线 温强度 热性能 DTA 试样 结合剂 羟甲基 化学键 600 500 下降 

分 类 号：TQ433.431[化学工程] TQ323.1