Phase Behavior of Binary and Ternary Blends Having the Same Chemical Components and Compositions

Joung Eun Yoo; Yong Kim; Chang Keun Kim; Jae Wook Lee

Macromolecular Research, Vol.11, No.5, 303-310, October, 2003

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Phase Behavior of Binary and Ternary Blends Having the Same Chemical Components and Compositions

Joung Eun Yoo^†, Yong Kim, Chang Keun Kim , and Jae Wook Lee¹

Department of Chemical Engineering, Chung-Ang University, 221 Huksuk-Dong, Dongjak-Gu, Seoul 156-756, Korea
¹Department of Chemical Engineering, Sogang University, 1 Shinsoo-Dong, Mapo-Gu, Seoul 121-742, Korea

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The phase behavior of binary blends of dimethylpolycarbonate-tetramethyl polycarbonate (DMPC-TMPC) copolycarbonates and styrene-acrylonitrile (SAN) copolymers has been examined and then compared with that of DMPC/TMPC/SAN ternary blends having the same chemical components and compositions except that the DMPC and TMPC were present in the form of homopolymers. Both binary and ternary blends were miscible at certain blends compositions, and the miscible blends showed the LCST-type phase behavior or did not phase separated until thermal degradation temperature. The miscible region of binary blends is wider than that of the corresponding ternary blends. Furthermore, the phase-separation temperatures of miscible binary blends are higher than those of miscible ternary blends at the same chemical compositions. To explain the destabilization of polymer mixture with the increase of the number of component, interaction energies of binary pairs involved in these blends were calculated from the phase separation temperatures using lattice-fluid theory and then the phase stability conditions for the polymer mixture was analyzed with volume fluctuation thermodynamics.

Keywords:binary blends;ternary blends;LCST-type phase behavior;phase stability conditions;interaction energy

[References]

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tenBrinke G, Karasz FE, Macknight WJ, Macromolecules, 16, 1827 (1983)
Min KE, Paul DR, Macromolecules, 20, 2828 (1987)
Fernandes AC, Barlow JW, Paul DR, Polymer, 27, 1789 (1986)
Kim MJ, Yoo JE, Choi HK, Kim CK, Macromol. Res., 10(2), 91 (2002)
Kim CK, Paul DR, Polymer, 33, 2089 (1992)
Kim CK, Paul DR, Polymer, 33, 4929 (1992)
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Sanchez IC, Lacombe RH, Macromolecules, 11, 1145 (1978)
Kim CK, Paul DR, Macromolecules, 25, 3097 (1992)
Kim JH, Park DS, Kim CK, J. Polym. Sci. B: Polym. Phys., 38(20), 2666 (2000)
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Kim JH, Yoo JE, Kim CK, Macromol. Res., 10(4), 209 (2002)
Kim CK, Paul DR, Polymer, 33, 1630 (1992)

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[1] Paul DR, Barlow JW, Polymer, 25, 487 (1984)

[2] Kambour RP, Bendler TJ, Bopp RC, Macromolecules, 16, 1827 (1983)

[3] tenBrinke G, Karasz FE, Macknight WJ, Macromolecules, 16, 1827 (1983)

[4] Min KE, Paul DR, Macromolecules, 20, 2828 (1987)

[5] Fernandes AC, Barlow JW, Paul DR, Polymer, 27, 1789 (1986)

[6] Kim MJ, Yoo JE, Choi HK, Kim CK, Macromol. Res., 10(2), 91 (2002)

[7] Kim CK, Paul DR, Polymer, 33, 2089 (1992)

[8] Kim CK, Paul DR, Polymer, 33, 4929 (1992)

[9] Kwei TK, Frisch HL, Radigan W, Vogel S, Macromolecules, 10, 157 (1977)

[10] Wang YY, Chen SA, Polym. Eng. Sci., 21, 47 (1981)

[11] Rigby D, Lin JL, Roe RJ, Macromolecules, 18, 2269 (1985)

[12] Shah V, Keitz JD, Paul DR, Barlow JW, J. Appl. Polym. Sci., 32, 3863 (1986)

[13] Equizabal JI, Irvin JJ, Cotazar M, Guzman GM, J. Appl. Polym. Sci., 32, 5945 (1986)

[14] Christiansen WH, Paul DR, Barlow JW, J. Appl. Polym. Sci., 34, 537 (1987)

[15] Brannock GR, Paul DR, Macromolecules, 23, 5240 (1990)

[16] Landry CJT, Yang H, Machell JS, Polymer, 32, 44 (1991)

[17] Pomposo JA, Calahorra E, Equiazabal I, Cortazar M, Macromolecules, 26, 2104 (1993)

[18] Sanchez IC, Macromolecules, 24, 908 (1991)

[19] Sanchez IC, Balaz AC, Macromolecules, 22, 2325 (1989)

[20] Sanchez IC, Encyclopedia of Physical Science and Technology, Academic Press Academic Press, New York, Vol. XI, pp. 1 (1987)

[21] Sanchez IC, Lacombe RH, J. Phys. Chem., 80, 2568 (1976)

[22] Sanchez IC, Lacombe RH, J. Phys. Chem., 80, 2358 (1976)

[23] Sanchez IC, Lacombe RH, Macromolecules, 11, 1145 (1978)

[24] Kim CK, Paul DR, Macromolecules, 25, 3097 (1992)

[25] Kim JH, Park DS, Kim CK, J. Polym. Sci. B: Polym. Phys., 38(20), 2666 (2000)

[26] Callaghan TA, Paul DR, Macromolecules, 26, 2439 (1993)

[27] Kim JH, Yoo JE, Kim CK, Macromol. Res., 10(4), 209 (2002)

[28] Kim CK, Paul DR, Polymer, 33, 1630 (1992)