Microstructure and miscibility of acrylonitrile-butadiene rubber/ethylene-propylene-diene monomer blends studied by positron annihilation spectroscopy

作者：Gomaa Ehsan^*

来源：Journal of Applied Polymer Science, 2007, 105(5): 2564-2570.

DOI：10.1002/app.26357

• blends
• compatibility
• fillers
• miscibility

The free-volume properties and miscibility of ethylene-propylene-diene monomer/acrylonitrile-butadiene rubber blends with poly(vinyl chloride) used for compatibilization were investigated with positron annihilation lifetime spectroscopy and Doppler broadening of annihilation radiation. The results showed that the ortho-positronium annihilation lifetimes and intensities as well as the S parameter had a linear relationship with a negative slope as a function of the weight percentage of acrylonitrile-butadiene rubber, which indicated the miscibility of the blend. The filling effect of silica on the free-volume properties of an ethylene-propylene-diene monomer/acrylonitrile-butadiene rubber (75/25) blend was also examined. On the other hand, a correlation between the size and concentration of the free-volume holes and the electrical and mechanical properties of the aforementioned blends was established.

• 出版日期2007-9-5