环氧树脂快速模具胶的结构与性能

Structure and properties of epoxy rapid tooling

研究了热塑性聚氨酯(TPU)、短玻璃纤维(SGF)和双改性蒙脱土(OMMT)对环氧树脂快速模具胶的结构和性能的影响.采用傅里叶变换红外光谱和差示扫描量热等方法进行测试和表征,用扫描电镜和透射电镜观察了模具胶的形态.结果表明,少量TPU能提高环氧树脂快速模具胶的力学性能,但降低其热稳定性和刚性;而OMMT与SGF并用使环氧树脂模具胶的力学性能和热性能都有更大的提高,OMMT有助于改善玻璃纤维与环氧树脂的界面结合,提高了模具胶的Tg、热稳定性和弯曲强度.

The effects of thermoplastic polyurethane （TPU）,short glass fiber （SGF） and double-surface orgno-modified montmorillonite（OMMT）on the structure and properties of epoxy rapid tooling were investigated by Fourier transform infrared spectroscopy （FTIR） ,differential scanning calorimetry （DSC）,transmission electron microscopy （TEM） and scanning electron microscope （SEM）. The results indicated that the mechanical properties of the epoxy rapid tooling were enhanced,but the thermal stability and rigidity were decreased by adding small amount of TPU; the mechanical properties and thermal stability were increased remarkably by adding both OMMT and SGF; Tg,flexural strength and thermal stability of the composites were improved by clay addition due to the improved interphase adhesion between glass fibers and epoxy.