Calcium carbonate was obtained by mixing the emulsified solutions of benzene and calcium chloride by non-ionic surfactants into the aqueous solutions of potassium carbonate. According to the reaction temperature, the crystal structure and shape of calcium carbonate were very different, and the surface of these materials were hydrophobic. Suspension polymerization of styrene in the presence of these calcium carbonate was conducted with poly(vinyl alcohol) (PVA) as dispersant and benzoyl peroxide as initiator. From these results, these hydrophobic calcium carbonate easily dispersed into the inside of polystyrene sphere.

Benzene과 염화칼슘 수용액을 비이온 계면활성제로 유화한 후, 탄산칼륨 수용액에 혼합하여 탄산칼슘을 합성하였다. 반응온도에 따라서 탄산칼슘의 결정형태와 입자 형태가 서로 다름을 알 수가 있었으며, 탄산칼슘 표면은 친유성을 나타내었다. 이렇게 합성된 탄산칼슘 존재하에서 분산제로서 PVA, 개시제로서 benzoyl peroxide를 사용하여 styrene을 분산중합하였다. 탄산칼슘의 표면이 친유성이기 때문에 polystyrene 내부에도 탄산칼슘이 잘 분산되었다.

Keywords: calcium carbonate; suspension polymerization; non-ionic surfactants; calcite; polystyrene