酚醛树脂改性脱硫石膏的热压工艺与耐水性能
发布时间：2018-07-17 08:58
【摘要】：研究了热压成型工艺对酚醛树脂改性脱硫石膏复合材料(简称复合材料)力学性能的影响,以及酚醛树脂对复合材料耐水性能的影响.采用X射线衍射仪(XRD)、热重分析仪(DTA)、扫描电子显微镜(SEM)、傅里叶变换红外光谱仪(FTIR)以及等温量热仪研究了酚醛树脂改性脱硫石膏的微观结构及水化机理.结果表明:复合材料抗折强度最佳热压成型工艺为热压压力8MPa,热压温度160℃,热压时间120s,抗压强度最佳热压成型工艺为热压压力8MPa,热压温度180℃,热压时间75s;当酚醛树脂掺量(质量分数,下同)为1.0%,硅烷偶联剂掺量为0.3%且膨胀剂掺量为3.0%时,复合材料2,24h的吸水率分别为0.58%和1.07%;酚醛树脂具有填充孔隙、密实体系和提高复合材料耐水性能的作用.
[Abstract]:The effect of hot pressing on the mechanical properties of phenolic resin modified desulphurized gypsum composites and the effect of phenolic resin on the water resistance of the composites were studied. The microstructure and hydration mechanism of phenolic resin modified desulphurized gypsum were studied by X-ray diffraction (XRD), thermogravimetry (DTA), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and isothermal calorimeter. The results show that the best hot pressing process is hot pressing pressure 8 MPA, hot pressing temperature 160 鈩，
本文编号：2129906
[Abstract]:The effect of hot pressing on the mechanical properties of phenolic resin modified desulphurized gypsum composites and the effect of phenolic resin on the water resistance of the composites were studied. The microstructure and hydration mechanism of phenolic resin modified desulphurized gypsum were studied by X-ray diffraction (XRD), thermogravimetry (DTA), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and isothermal calorimeter. The results show that the best hot pressing process is hot pressing pressure 8 MPA, hot pressing temperature 160 鈩，
本文编号：2129906
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