Poly(butyl acrylate)/Poly(methyl methacrylate) 다층구조 고무입자의 제조

안태완; 황태원; 신규순; 조재영

Polymer(Korea), Vol.20, No.3, 535-541, May, 1996

Export Citation

Poly(butyl acrylate)/Poly(methyl methacrylate) 다층구조 고무입자의 제조

Preparation of Multilayered Poly(butyl acrylate)/Poly(methyl methacrylate) Rubber Particles

안태완, 황태원, 신규순, 조재영

초록

Poly(butyl acrylate) (PBA)를 core로 하고 poly(methyl methacrylate) (PMMA)를 shell로 하는 core/shell 다층구조 고무 입자를 두 단계의 유화중합으로 제조하였다. Core 중합에서는 seed 유화중합법으로 입자의 수를 조절하였으며, shell 중합에서는 semi-batch 방법으로 PMMA 단일 중합체의 형성을 억제하였다. 반응온도, 개시제, 유화제의 양 등 반응조건의 변화에 따른 PBA core 입자의 크기와 분포를 조사하여, 최적조건에서 core 입자를 합성하고, 이 위에 shell을 형성시켜 core/shell 구조의 고무입자를 얻었다. Core와 shell 간의 그래프팅의 존재와 그 효율을 용매추출법과 크로마토그래피 방법으로 조사하였다. 최종 조건에서 합성된 core/shell입자의 수평균 입자크기는 137nm정도이었으며, 그래프팅 효율은 60%정도이었다.

Core/shell rubber particles, which contain poly(butyl acrylate) (PBA) as a rubery core and poly(methyl methacrylate) (PMMA) as a glassy shell, were prepared by two-step emulsion polymerization. A seeded emulsion polymerization with semi-batch process was employed to keep the particles free of shell-only particles. Particle size was controlled by regulating the reaction temperature, contents of initiator and emulsifier. Grafting of PMMA onto PBA and its efficiency were determined by a solvent extraction and a chromatographic technique. The core/shell particles with the number average diameter of 137 nm and the grafting efficiency of 60% were obtained by an optimized polymerization condition.

Keywords:core/shell particles;emulsion polymerization;grafting

[References]

Lovell PA, McDonald J, Saunders EDJ, Sherratt MN, Young RJ, Plast. Rubber Comp. Proc. Appl., 16, 37 (1991)
Gunson DJ, J. Vinyl Technol., 2, 183 (1981)
Cheng TW, Keskkula H, Paul DR, J. Appl. Polym. Sci., 45, 531 (1992)
Chen YC, Dimonie V, El-Aasser MS, Polym. Int., 30, 185 (1993)
Rasatapiti P, Dimonie VL, El-Aasser MS, J. Macromol. Sci.-Chem., 32, 1445 (1995)
Min TI, Klein A, El-Aasser MS, Vanderhoff JW, J. Polym. Sci. A: Polym. Chem., 21, 2845 (1983)
Okubo M, Yamada A, Matsumoto T, J. Polym. Sci. A: Polym. Chem., 16, 3219 (1980)
Lee D, "Emulsion Polymers and Emulsion Polymerization," ACS Symp. Ser. 165, Eds. by D. Bassett and A. Hamielec, p. 405, Amer. Chem. Soc., Washington (1981)
Muroi S, Hashimoto H, Hosoi K, J. Polym. Sci. A: Polym. Chem., 22, 1365 (1984)
Chern CS, Poehlein GW, J. Polym. Sci. A: Polym. Chem., 25, 617 (1987)

[Referenced By]

[1] Lovell PA, McDonald J, Saunders EDJ, Sherratt MN, Young RJ, Plast. Rubber Comp. Proc. Appl., 16, 37 (1991)

[2] Gunson DJ, J. Vinyl Technol., 2, 183 (1981)

[3] Cheng TW, Keskkula H, Paul DR, J. Appl. Polym. Sci., 45, 531 (1992)

[4] Chen YC, Dimonie V, El-Aasser MS, Polym. Int., 30, 185 (1993)

[5] Rasatapiti P, Dimonie VL, El-Aasser MS, J. Macromol. Sci.-Chem., 32, 1445 (1995)

[6] Min TI, Klein A, El-Aasser MS, Vanderhoff JW, J. Polym. Sci. A: Polym. Chem., 21, 2845 (1983)

[7] Okubo M, Yamada A, Matsumoto T, J. Polym. Sci. A: Polym. Chem., 16, 3219 (1980)

[8] Lee D, "Emulsion Polymers and Emulsion Polymerization," ACS Symp. Ser. 165, Eds. by D. Bassett and A. Hamielec, p. 405, Amer. Chem. Soc., Washington (1981)

[9] Muroi S, Hashimoto H, Hosoi K, J. Polym. Sci. A: Polym. Chem., 22, 1365 (1984)

[10] Chern CS, Poehlein GW, J. Polym. Sci. A: Polym. Chem., 25, 617 (1987)