摘要
分别用溶剂法和熔融法成功制备了有机粘土/聚醚砜/环氧树脂杂化纳米复合材料,对其拉伸性能、断裂韧性、热性能和微观结构进行了研究。结果表明:两种杂化纳米复合材料的拉伸强度可达75 MPa以上,模量可达3.0 GPa以上,断裂韧性可达1.1 MPam1/2以上。观察到了聚醚砜和有机粘土对环氧树脂的协同增韧现象。聚醚砜/环氧树脂基体具有半互穿网络结构,有机粘土片层呈有序剥离形态。用溶剂法制备的杂化纳米复合材料样本的玻璃化转变温度(Tg)在170℃以上,用熔融法制备的样本的Tg在180℃以上。
Organoclay/polyethersulphone/epoxy hybrid nanocomposites were prepared by solvent method and melting method, respectively. Their tensile properties, fracture toughness, thermal properties and microstructures were then characterized. Their tensile strength arrived at 75 MPa, modulus reached2.8GPa, and fracture toughness was over 1.1MPam1/2. Synergistic toughening effect of the polyethersulphone and organoclay on the epoxy resin was observed. Semi-interpenetrating network of the polyethersulphone/epoxy matrix was found by dynamic mechanical thermal analyzer(DMA) and transmission electron microscope(TEM). The results of X-ray diffractometer(XRD) analysis and TEM observation reveal that the organoclay possessed ordered exfoliated morphologies. Glass transition temperatures(Tgs) of the two hybrid nanocomposites were tested by dynamic mechanical thermal analysis(DMTA). The Tgof the specimen prepared by the solvent method was found higher than 170℃, while that by the melting method was more than 180℃.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2014年第10期794-800,共7页
Chinese Journal of Materials Research
基金
国家科技重大专项2011ZX05051资助项目~~
