本文开展了有机硅改性酚醛树脂复合材料制备及性能研究。首先进行有机硅改性酚醛树脂复合材料的制备:将4 g甲基苯基二甲氧基硅烷溶于25 m L四甲基氢氧化铵中,然后将得到的料液添至去离子水中进行搅拌,得到黄色固体,并将其置于60℃烘箱中...本文开展了有机硅改性酚醛树脂复合材料制备及性能研究。首先进行有机硅改性酚醛树脂复合材料的制备:将4 g甲基苯基二甲氧基硅烷溶于25 m L四甲基氢氧化铵中,然后将得到的料液添至去离子水中进行搅拌,得到黄色固体,并将其置于60℃烘箱中,设置时间24 h,得出有机硅改性酚醛树脂复合材料。再者,对有机硅改性酚醛树脂复合材料的热性能及复合材料层间剪切强度进行测试。研究结果表明:当固化环氧树脂和固化剂质量比为95∶5时,有机硅改性酚醛树脂复合材料性能最优,此时其层间剪切强度高达87.5 MPa,热失重质量为0.22 g,耐热性能更好。展开更多
A nitrile butadiene elastomeric nanoparticle (NBENP) was used for modification of resol phenolic resin.The reaction between NBENP and resol was measured by FT-IR,and the curing behavior of resins was charactered by DS...A nitrile butadiene elastomeric nanoparticle (NBENP) was used for modification of resol phenolic resin.The reaction between NBENP and resol was measured by FT-IR,and the curing behavior of resins was charactered by DSC.The mecanical and thermal properties of modified resins were measured.Fra cture surface of modified phenolic resin was observed by SEM.The results showed that,the impact strength, flexural strength and heat resistance of NBENP modifie d phenolic resin were increased at the same time. A strong interface adhesion wa s formed because of the reaction between hydroxymethyl of resol and NBENP.This s pecial interface conduces to transmission of stress when materials were loaded,a nd inhibition of deformation and decomposition of phenolic matrix when heated.Th e microcrack,initiated with rubber particle,and cavitation of rubbers might be t he main reason for increase in toughness.The honeycomb structure in fracture sur face might be another possible reason for excellent mechanical properties.展开更多
文摘A nitrile butadiene elastomeric nanoparticle (NBENP) was used for modification of resol phenolic resin.The reaction between NBENP and resol was measured by FT-IR,and the curing behavior of resins was charactered by DSC.The mecanical and thermal properties of modified resins were measured.Fra cture surface of modified phenolic resin was observed by SEM.The results showed that,the impact strength, flexural strength and heat resistance of NBENP modifie d phenolic resin were increased at the same time. A strong interface adhesion wa s formed because of the reaction between hydroxymethyl of resol and NBENP.This s pecial interface conduces to transmission of stress when materials were loaded,a nd inhibition of deformation and decomposition of phenolic matrix when heated.Th e microcrack,initiated with rubber particle,and cavitation of rubbers might be t he main reason for increase in toughness.The honeycomb structure in fracture sur face might be another possible reason for excellent mechanical properties.
