摘要
分析了聚氨酯树脂78BD085/44CP20与环氧树脂在黏度、凝胶时间以及浇注体力学性能的不同,将其与玻纤布结合采用真空灌注方式分别制备了玻纤增强复合材料(FRP),对比了聚氨酯FRP以及环氧FRP的力学性能和疲劳性能,并采用扫描电镜观察了聚氨酯FRP断面。结果表明:相同温度下,聚氨酯树脂的初始黏度比环氧树脂的更低,凝胶时间更快;聚氨酯树脂浇注体拉伸模量以及拉伸、压缩强度均高于环氧树脂浇注体15%以上;聚氨酯FRP具有优异的力学性能,拉伸、压缩以及剪切强度均高于环氧树脂FRP 7%以上;聚氨酯FRP疲劳性能满足叶片的结构设计要求;聚氨酯树脂与玻纤布具有优异的结合性。
The differences between polyurethane resin(78BD085/44CP20)and epoxy resin in viscosity,gel time and mechanical properties of the casting body were analyzed respectively.The glass fiber reinforced plastic(FRP)were prepared by vacuum pouring with glass fiber cloth.The mechanical properties and fatigue properties of polyurethane FRP and epoxy FRP were compared.Meanwhile,the cross-section of polyurethane FRP was observed by scanning electron microscope.The results showed that the initial viscosity of polyurethane resin was lower than that of epoxy resin at the same temperature,and the gel time of polyurethane resin was faster.The tensile modulus,tensile strength and compression strength of polyurethane resin casting pieces were more than 15%higher than those of epoxy resin casting pieces.Polyurethane FRP had excellent mechanical properties.The tensile,compression and shear strengths of polyurethane FRP were more than 7%higher than epoxy FRP.The fatigue performance of polyurethane could satisfy the structural design requirements of the blade.SEM analysis of the cross-section of polyurethane FRP showed that polyurethane resin and glass fiber cloth had excellent adhesion.
作者
付国良
冯学斌
陈煌
李诚亮
黄明富
FU Guoliang;FENG Xuebin;CHEN Huang;LI Chengliang;HUANG Mingfu(Zhuzhou Times New Material Company Co.Ltd,Zhuzhou 412007,Hunan,China)
出处
《聚氨酯工业》
CAS
2023年第1期30-33,共4页
Polyurethane Industry
关键词
风电叶片
聚氨酯树脂
环氧树脂
力学性能
turbine blade
polyurethane resin
expoy resin
mechanical property
