Abstract
In preparing void latex particles by emulsion polymerization, the weight mean particle size of which is ranged $0.3{\mu}m{\sim}1.5{\mu}m$, reaction parameters were investigated in order to elucidate their effects on the size distribution and the solid content of emulsion polymer. Experimental results showed that the weight mean particle size of hydrophillic core polymer was reduced as the concentration of sodium dodecylbenzene sulfonate (SDS) increased. The size of void polymethyl-methacrylate-polystyrene composite latex particles became larger as the concentration of styrene monomer and the sodium persulfate increased. However, the size of void latex particles was reduced as the feeding rate of acrylic acid increased. The solid content of emulsion polymer was strongly dependent on the addition of stylene monomer. By increasing the concentration of styrene monomer the solid content of emulsion polymer increased linearly.
유화중합을 이용하여 중량 평균입자크기가 $0.3{\mu}m{\sim}1.5{\mu}m$인 중공 라텍스 입자를 제조함에 있어 평균입자크기와 고형분 함량에 영향을 미치는 반응 인자를 조사하였다. 실험결과 유화제 (SDS)의 농도가 증가함에 따라 친수성 코어 폴리머의 크기가 작아졌으며, 친유성 스티렌 단량체 (styrene monomer)와 개시제 (SPS)의 첨가량이 증가함에 따라 중공입자의 크기가 커졌다. 한편, 친수성 아크릴산의 첨가속도가 증가함에 따라 중공입자의 크기가 작아졌다. 또한, 스틸렌 단량체의 첨가량이 증가함에 따라 에멀젼 폴리머의 고형분 함량이 선형적으로 증가하였다.