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以表面改性的磨碎玻纤为增强材料制备了环氧树脂薄膜作为传感器应变片的基底材料。考察了玻纤表面改性及添加量对材料性能的影响。结果表明,随着偶联剂用量、玻纤填充量的增加材料的拉伸强度和拉伸模量均先增大后减小。薄膜微结构表明,填充20wt%的改性玻纤增强材料中纤维能够更好的分散在树脂中,玻纤在材料内部比较集中的区域能够互相交叠。随着改性玻纤含量的增加材料的玻璃化温度和抗蠕变性能明显改善。结果证实,填充20wt%的1wt%KH-550偶联剂改性的磨碎玻纤的增强环氧树脂材料具有最佳的力学强度、耐热性和抗蠕变性能。
Epoxy resin film was prepared as the base material of sensor strain gauge by using surface modified glass fiber as reinforcing material. The effects of glass fiber surface modification and addition amount on material properties were investigated. The results show that with the dosage of coupling agent, the tensile strength and tensile modulus of the material increase first and then decrease with the increase of glass fiber loading. The film microstructure shows that the fibers filled with 20wt% modified glass fiber reinforced material can be better dispersed in the resin, and the glass fiber can overlap each other in the areas where the materials are more concentrated. With the increase of modified glass fiber, the glass transition temperature and creep resistance of the material are obviously improved. The results confirmed that reinforced 20% by weight of 1wt% KH-550 coupling agent modified glass fiber reinforced epoxy resin material has the best mechanical strength, heat resistance and creep resistance.