| 초록 |
We fabricated polypropylene (PP) micro-particles via crystallization in PP/decalin solution. During the thermally induced phase separation (TIPS) process, formation of micro-particles occurred while cooling of PP/decalin solution was controlled. As expected in controlling the nucleation and growth rates, we could observe formation of larger crystals when we increased concentration of PP in PP/decalin solution. The concentrated PP resulted in an increase in the average diameter of PP particles. We characterized the effects of surfactants on particles using a field emission scanning electron microscope (FE-SEM). The PP crystals had spherical shapes with a diameter ranged 5 ~ 18 μm. Additionally, as an effect of concentration of PP, the size distribution of the PP micro-particles formed at higher concentration of PP in the solution became broad. |
