透闪石/环氧树脂复合材料性能研究

环氧树脂是一类综合性能较好的热固性树脂，为了扩大其应用范围．通常的办法是采用纤维进行增强．目前，许多研究工作者采用纳米粒子、粘土对其进行改性，所用的粘土包括各种有机蒙脱土、高岭土等，作者曾采用海泡石对环氧树脂进行改性，使环氧树脂的各项力学性能得以提高，然而采用透闪石对环氧树脂进行改性，还鲜见相关报道．透闪石是一种带有极性基团的天然矿物，

STUDIES ON TREMOLITE/EPOXY COMPOSITES

Tremolite as a filling material influences the properties of epoxy matrix.Before making composites,the tremolite was treated with cetyl trimethyl ammonium bromide.The composite was first prepared with organic tremolite,epoxy CYD-128 and curing agents.The changes of surface properties of organic tremolite were investigated using FT-IR.The impact strength,bend strength and bend modulus of tremolite/epoxy composites were studied with the tremolite content varied from 1% to 8% by mass.The fracture morphology of the impact specimens was observed by scanning electron microscope(SEM),and the tremolite dispersion was observed with tunnel electron microscope(TEM).The investigation of the thermo-mechanical behavior was performed by dynamic-mechanic thermal analysis(DMA).As a result,when tremolite was installed,the bend strength increased by 100% up to 118 MPa compared with the neat epoxy.The bend modulus increased from 3100 GPa to 4100 GPa.The impact strength increased by 200% up to 13 kJ/m~2 compared with the neat epoxy.Significant improvements in the mechanical properties of the resulting composites were illustrated in the storage modulus.From the surface analysis,it was found that surface was organic.Tremolite was dispersed well in epoxy matrix as fiber state,so it enhances the mechanical properties of epoxy matrix.