PPU原位封闭合成酚醛树脂及其阻尼性能研究  

Study of PPU in-situ closed synthesized phenolic resin and its damping properties

作　　者：张红颖 夏绍灵[1] 刘聪 裴云亮 郭煜 ZHANG Hongying;XIA Shaoling;LIU Cong;PEI Yunliang;GUO Yu(School of Materials Science and Engineering,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]河南工业大学材料科学与工程学院,郑州450001

出　　处：《复合材料科学与工程》2024年第11期56-61,68,共7页Composites Science and Engineering

摘　　要：以苯酚和甲醛为原料,将聚氨酯预聚体(PPU)以原位封闭的方法引入酚醛树脂(PF),成功合成PPU改性PF。通过红外光谱法(FTIR)和差示扫描量热法(DSC)研究了改性树脂与PPU的化学结构与性质,通过电子万能试验机和单臂摆锤冲击试验机研究了PPU添加量对改性树脂力学性能的影响,并用扫描电镜(SEM)对断裂面形貌进行了分析,还通过热重分析(TG)和动态热机械分析仪(DMA)测试了改性树脂的热性能与阻尼性能。结果表明:随PPU添加量的增加,改性树脂力学性能与Tg先升高后降低,当PPU添加量为10%时,改性树脂的力学性能最优,有明显增韧作用。所有PPU改性的酚醛树脂的阻尼性能均明显提高。PPU-modified PF was successfully synthesized by introducing polypropylene urethane prepolymer(PPU)into phenolic resin(PF)by in situ closure method using phenol and formaldehyde as raw materials.The chemical structures and properties of the modified resins and PPU were investigated by infrared spectroscopy(FT IR)and differential scanning calorimetry(DSC),the effects of PPU additions on the mechanical properties of mod ified resins were investigated by means of an electronic universal testing machine and a single-arm pendulum impact testing machine.The fracture surface morphology was also analyzed by scanning electron microscopy(SEM),and the thermal and damping properties of the modified resins were also tested by thermogravimetric analysis(TG)and dynamic thermomechanical analyzer(DMA)instrument.The results show that as the PPU addition increases,the mechanical properties of the modified resin and the Tg initially increase and then decrease,and the mechanical properties of the modified resin are optimal at 10%PPU addition with an obvious toughening effect.The damping properties of all PPU modified phenolic resins are significantly improved.

关 键 词：聚氨酯预聚体 酚醛树脂 复合材料 阻尼性能 原位封闭 

分 类 号：TB332[一般工业技术—材料科学与工程]