유화중합에 의한 Methyl Methacrylate-Styrene계 Core-Shell 라텍스 입자 제조에 관한 연구

• 영문명: Preparation of Methyl Methacrylate-Styrene System Core-Shell Latex by Emulsion Polymerization
• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 김남석(Kim NamSeok) 김덕술(Kim DuckSool) 이석희(Lee SeokHee) 박근호(Park KeunHo)
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제22권 제2호, 96~105쪽, 전체 10쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2005.06.30

영문 초록

Core-shell polymers of methyl methacrylate-styrene system were prepared by sequential emulsion polymerization in the presence of sodium dodecyl benzene sulfonate(SDBS) as an emulsifier using ammonium persulfate(APS) in an initiator and the characteristics of these core-shell polymers were evaluated. Core-shell composite latex has the both properties of core and shell components in a particle, whereas polymer blends or copolymers show a combined physical properties of two homopolymers. This unique behavior of core-shell composite latex can be used in various industrial fields. However, in preparation of core-shell composite latex, several unexpected matters are observed, for examples, particle coagulation, low degree of polymerization, and formation of new particles during shell polymerization. To solve this matters, we study the effects of surfactant concentrations, initiator concentrations, and reaction temperature on the core-shell structure of PMMA-PSt and PSt-PMMA. Particle size and particles distribution were measured by using particle size analyzer, and the morphology of the core-shell composite latex was observed by using transmission electron microscope. Glass temperature was also measured by using differential scanning calorimeter. To identify the core-shell structure, pH of the composite latex solutions was measured.

키워드

core-shell methyl methacrylate-styrene emulsion polymerization sodium dodecvl benzene sulfonate ammonium persulfate