클로로포름용액 캐스팅으로 제조된 폴리메틸메타크릴레이트/폴리비닐아세테이트 블렌드의 상거동

이원기; 하창식

Polymer(Korea), Vol.18, No.6, 935-941, November, 1994

Export Citation

클로로포름용액 캐스팅으로 제조된 폴리메틸메타크릴레이트/폴리비닐아세테이트 블렌드의 상거동

Phase Behavior of Chloroform Solution-cast Poly(methyl methacrylate)/Poly(vinyl acetate) Blends

이원기, 하창식

초록

클로로포름용액으로 캐스팅된 폴리메틸메타크릴레이트(PMMA)와 폴리비닐아세테이트(PVAc)블렌드의 상거동을 광산란장치, 시차주사열량계 등을 이용하여 조사하였다. 클로로포름용액으로 캐스팅된 PMMA와 PVAc 블렌드는 LCST 거동을 보였으며 PMMA와 PVAc의 상호작용에너지밀도(Λ, /cm³)는 온도(T, Kelvin) 및 조성(Φ)에 대해 Λ=-0.100304+0.00009Φ+0.000299T의 관계를 나타내었다. 50/50조성의 상용성블렌드를 임계상분리온도 이상으로 열처리한 뒤의 상분리거동도 연구하였다.

The phase behavior of blend films of poly(methyl methacrylate)(PMMA) and poly(vinyl acetate)(PVAc) cast from chloroform has been investigated by light scattering, differential scanning calorimeter(DSC), scanning electron microscopy(SEM), and Fourier transform infrared(FTIR) spectroscopy. The PMMA/PVAC blend cast from chloroform exhibited lower critical solution temperature(LCST) behavior. The interaction energy density(Λ, ca1/cm³) between PMMA and PVAc, was given in the functional form, Λ=-0.100304+0.00009Φ+0.000299T, where Φ is the volume fraction of PVAc and T is the temperature in Kelvin. The thermally induced phase separation behavior was also investigated at higher temperatures above the LCST of the blend at the 50/50 composition by weight.

Keywords:poly(methyl methacrylate);poly(vinyl acetate);blend;phase behavior

[References]

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[2] Olabishi O, Robeson LM, Shaw MT, "Polymer-Polymer Miscibility," Academic Press, New York (1979)

[3] Kwei TK, Nishi T, Roberts RF, Macromolecules, 7, 667 (1974)

[4] Nishi T, Wang TT, Kwei TK, Macromolecules, 8, 227 (1975)

[5] Dobry A, Boyer-Kawenoki F, J. Polym. Sci., 2, 90 (1947)

[6] Quipeng G, Polym. Commun., 31, 217 (1990)

[7] Chien YY, Pearce EM, Kwei TK, Macromolecules, 21, 1616 (1988)

[8] Roe RJ, Zin WC, Macromolecules, 13, 1221 (1980)

[9] Coleman MM, Varnell DF, Macromolecules, 13, 1403 (1980)

[10] Varness DF, Runt JR, Coleman MM, Macromolecules, 14, 1350 (1981)

[11] Brandrup J, Immergut EH, "Polymer Handbook," 3rd Ed., V-71; see also V-77, Wiley International, New York (1989)

[12] Ha CS, Cho WJ, Ryou JH, Roe RJ, Polymer, 34(3), 505 (1993)

[13] Bank M, Leffingwell J, Thies C, Macromolecules, 4, 43 (1971)

[14] Lu FJ, Benedetti E, Hsu SL, Macromolecules, 16, 1525 (1983)

[15] Garcia D, J. Polym. Sci. B: Polym. Phys., 22, 107 (1984)

[16] Jinghira Y, Alfornso GC, Turturro A, Pedemonte E, Polymer, 45(7), 1465 (1993)

[17] Varknell DF, Coleman MM, Polymer, 22, 1324 (1981)

[18] Guerra G, Choe SJ, Williams DJ, Karasz FE, MacKnight WJ, Macromolecules, 21, 231 (1988)

[19] Utracki LA, "Polymer Alloys and Blends, Thermodynamics and Rheology," p. 64, Oxford University Press, New York (1991)