PP/PEOC 블렌드의 발포거동에 관한 연구 = Foaming of PP/PEOC Blend System and Phase Morphology

다국어 초록 (Multilingual Abstract)

Polypropylene(PP) has many beneficial properties such as low density, relative high thermal stability, resistance to chemical attack, easy processing, recycl- ability, and low material cost. However, a few research has been done on the production of polypropylene foams due to its low melt strength and melt elasticity that makes it difficult to be foamed compared to the other plastics.
In this study, we focused our efforts to foam at low temperature to improve the foaming problem followed by increasing melt strength PP by blending with ethylene/1-octene copolymers(PEOC).
Phase morphology of PP/PEOC blends were investigated to examine the effect of phase morphology on the foaming ratio and cell structure of foams. Phase morphology of PP/PEOC blends were affected by content of PEOC, mixing torque ratio. The higher blowing ratio and more stable cell structure was produced by continuous PP matrix with dispersed droplets of PEOC, and it seems that easiness of bubble nucleation and cell propagation at the interface between PEOC droplet and PP matrix.

목차 (Table of Contents)

• Ⅰ. 서론
• Ⅱ. 실험
• Ⅲ. 결과 및 고찰
• Ⅳ. 결론
• 참고문헌