论文部分内容阅读
以短切玻璃纤维、维纶短纤维和活性硅微粉等作为自制酚醛树脂(PF)的增强填料,制备立体无规分布的短纤维增强型PF模塑料。采用红外光谱(FT-IR)法和差示扫描量热(DSC)法对合成树脂的结构进行了表征,并对复合材料的力学性能和热性能进行了研究。结果表明:维纶纤维增强型复合材料具有轻质、高韧性等优点,但其耐热性欠佳、力学性能不如玻璃纤维增强型复合材料;加入15%活性硅微粉后,维纶纤维增强型复合材料的综合性能明显提高,其收缩率为0.39%(下降54%)、吸水率为0.24%(下降40%)、密度为1.37 g/cm3、弯曲强度为99.6 MPa(提高了17.6%)、马丁耐热温度(143℃)和弯曲模量(6.19 GPa)均提高了10%左右。
The chopped glass fiber, vinylon staple fiber and active silica powder as the self-made phenolic resin (PF) reinforcing filler, prepared three-dimensional random distribution of short fiber reinforced PF molding compound. The structure of synthetic resin was characterized by FT-IR and DSC. The mechanical and thermal properties of the composites were also studied. The results show that the vinylon fiber reinforced composite has the advantages of light weight and high toughness, but its heat resistance is not as good as that of the glass fiber reinforced composite. When 15% active silica is added, the vinylon fiber reinforced composite With a shrinkage of 0.39% (down 54%), a water absorption of 0.24% (down 40%), a density of 1.37 g / cm3, a flexural strength of 99.6 MPa (an increase of 17.6%), The hot temperature (143 ℃) and flexural modulus (6.19 GPa) increased about 10%.