| 초록 |
Polyphenylene oxide/polyamide (PPO/PA) blends have been applied to many fields, for instance, automotive parts, because it achieves a good combination of the processability and chemical resistance of PA with the high impact resistance and low coefficient of thermal expansion (CTE) of PPO. However, the blend suffers from some drawbacks when this is used as one of exterior parts of automotive for the weight reduction. First, PPO/PA blend still has relatively high CTE compared to steel, which results in a poor external appearance if they are nearby assembled. The other is that the addition of some inorganic fillers to lower CTE of the blend seriously weakens the impact strength. In this study, we consider pitch-based short carbon fibers as a potential filler for PPO/PA blend because they display extremely good dimensional stability and moderate cost compared to PAN-based carbon fibers. Effect of surface treatment on the impact strength and CTE of the blend was investigated. |
