방향족 Polybenzimidazole/Polyetherimide 블렌드의 상용성

최순자; 안태광

Polymer(Korea), Vol.15, No.1, 57-66, February, 1991

Export Citation

방향족 Polybenzimidazole/Polyetherimide 블렌드의 상용성

Miscibility in Aromatic Polybenzimidazole/Polyetherimide Blends

최순자, 안태광

초록

방향족 폴리벤지미다졸(PBI), poly[2,2'(m-phenylene)-5,5'-bibenzimidazole]과 방향족 폴리이써이미드(PEI), poly[2,2'-bis(3,4-dicarboxyphenoxy) phenyl propane-2-phenylene bisimide]로 만들어진 블렌드의 열적, 기계적 물성 및 FTIR 분광학적 특성에 미치는 온도 의존성을 조사하였다. 블렌드 전 조성에 걸쳐 하나의 T_g를 가지나 높은 온도로 가열됨에 따라 두 개의 상으로 분리되었으며, 블렌드의 내열성은 PEI 단일성분에 비해 월등히 양호한 것으로 관찰되었다. 블렌드 조성에 따라 실온에서 PBI의 N-H 스트레칭 band와 PEI의 C=O 스트레칭 band는 각각 55㎝^-1와 7㎝^-1씩 낮은 주파수 쪽으로 이동이 관찰되었으며 높은 온도에서 annealing함에 따라 주파수 이동이 사라졌는데 이는 두 고분자들사이의 분자간 상호작용이 더 이상 존재하지 않는 결과로 추정된다. FTIR상에서 관찰된 열적으로 야기된 상분리 현상은 DSC로 얻어진 상분리 온도와 잘 일치됨을 보였다. Instron을 이용하여 실온에서 측정한 blends의 stiffness, yield stress 및 modulus는 순수한 고분자의 측정값보다 높은 양상을 보여 두 고분자들 사이에 존재하는 분자간 상호작용을 다시 확인하였다.

Thermal, mechanical properties and temperature dependent fourier transform infrared (FTIR) spectroscopic behaviors of blends from an amorphous polybenzimidazole, poly[2,2'(m-phenylene)-5,5'-bibenzimidazole] (PBI), and an amorphous polyetherimide, poly[2,2'-bis (3,4-dicarboxyphenoxy) phenyl propane-2-phenylene bismide] (PEI) have been investigated. A single composition dependent T_g disappears at high temperature, which implies two phase regime. Thermal properties of the blends showed higher weight retention and residue compared to those of PEI homopolymer. Frequency shifts of up to 55㎝^-1 in the N-H stretching band of PBI and of up to 7㎝^-1 in the carbonyl stretching band of PEI at room temperature indicating specific intermolecular interactions involved in this blend system have ostensively been altered due to annealing at higher temperature. Thermally induced phase separation obtained using FTIR is in good agreement with the previous DSC results. Mechanical properties obtained using Instron at room temperature showed high stiffness, yield stress and modulus for the blends, which suggest specific intermolecular interactions between the constituents.

[References]

Mittal KL, "Polyimides," vol. 1 & 2, Plenum Press, New York (1984)
Powers EJ, Serad GA, Division of Chem. ACS Preprint, 27, No. 1, 495 (1984)
Bell VL, J. Polym. Sci. A: Polym. Chem., 14, 225 (1976)
Clair AK, Clair TL, Slemp WS, Ezzell KS, NASA TM-87650 report (1985)
Hedrick JL, Labadie JW, Palmer TD, Russell TP, page 61 in ref. 11
Buckley A, Stuetz DE, Serad GA, Celanese Research Report (1985)
Leung L, Williams DJ, Karasz FE, MacKnight WJ, Polym. Bull., 16, 457 (1986)
Guerra G, Choe S, Williams DJ, Karasz FE, MacKnight WJ, Macromolecules, 21, 231 (1988)
Stankovic S, Guerra G, Williams DJ, Karasz FE, MacKnight WJ, Polym. Commun., 29, 14 (1988)
Guerra G, Williams DJ, Karasz FE, MacKnight WJ, J. Polym. Sci. B: Polym. Phys., 26, 301 (1988)
Choe S, Karasz FE, MacKnight WJ, Contemporary Topics in Polym. Science, Vol. 6, "Multiphase Macromolecular Systems," B.M. Culbertson Ed. Plenum Press, New York, 495 (1989)
Choe S, MacKnight WJ, Karasz FE, page 25 in "Polyimides: Material, Chemistry and Characterization," ed. by C. Feger, Elsevier Sci., Publishers, B.V., Amsterdam, 25 (1989)
Couchman PR, Annals New York Academy of Sci., 371 (1981)
Pugh C, Percec V, Macromolecules, 19, 65 (1986)
Kwei TK, J. Polym. Sci. C: Polym. Lett., 22, 307 (1984)
Nielsen LE, J. Am. Chem. Soc., 75, 1435 (1953)
Buchdahl R, Nielsen LE, J. Polym. Sci., 15, 1 (1955)
Wetton RE, MacKnight WJ, Fried JR, Karazy FE, Macromolecules, 11, 150 (1978)
Bellamy LJ, "The Infrared Spectra of Complex Molecules," N.Y. John Wiley & Sons, Inc. (1958)
Patterson D, Polym. Eng. Sci., 22, 64 (1982)
Chun BC, Polym.(Korea), 13(6), 479 (1989)
Krause S, J. Macromol. Sci.-Macromol. Chem., 7, 251 (1982)
Choe S, Ahn TK, Polym.(Korea), 14(2), 115 (1990)

[Referenced By]

[1] Mittal KL, "Polyimides," vol. 1 & 2, Plenum Press, New York (1984)

[2] Powers EJ, Serad GA, Division of Chem. ACS Preprint, 27, No. 1, 495 (1984)

[3] Bell VL, J. Polym. Sci. A: Polym. Chem., 14, 225 (1976)

[4] Clair AK, Clair TL, Slemp WS, Ezzell KS, NASA TM-87650 report (1985)

[5] Hedrick JL, Labadie JW, Palmer TD, Russell TP, page 61 in ref. 11

[6] Buckley A, Stuetz DE, Serad GA, Celanese Research Report (1985)

[7] Leung L, Williams DJ, Karasz FE, MacKnight WJ, Polym. Bull., 16, 457 (1986)

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

[9] Stankovic S, Guerra G, Williams DJ, Karasz FE, MacKnight WJ, Polym. Commun., 29, 14 (1988)

[10] Guerra G, Williams DJ, Karasz FE, MacKnight WJ, J. Polym. Sci. B: Polym. Phys., 26, 301 (1988)

[11] Choe S, Karasz FE, MacKnight WJ, Contemporary Topics in Polym. Science, Vol. 6, "Multiphase Macromolecular Systems," B.M. Culbertson Ed. Plenum Press, New York, 495 (1989)

[12] Choe S, MacKnight WJ, Karasz FE, page 25 in "Polyimides: Material, Chemistry and Characterization," ed. by C. Feger, Elsevier Sci., Publishers, B.V., Amsterdam, 25 (1989)

[13] Couchman PR, Annals New York Academy of Sci., 371 (1981)

[14] Pugh C, Percec V, Macromolecules, 19, 65 (1986)

[15] Kwei TK, J. Polym. Sci. C: Polym. Lett., 22, 307 (1984)

[16] Nielsen LE, J. Am. Chem. Soc., 75, 1435 (1953)

[17] Buchdahl R, Nielsen LE, J. Polym. Sci., 15, 1 (1955)

[18] Wetton RE, MacKnight WJ, Fried JR, Karazy FE, Macromolecules, 11, 150 (1978)

[19] Bellamy LJ, "The Infrared Spectra of Complex Molecules," N.Y. John Wiley & Sons, Inc. (1958)

[20] Patterson D, Polym. Eng. Sci., 22, 64 (1982)

[21] Chun BC, Polym.(Korea), 13(6), 479 (1989)

[22] Krause S, J. Macromol. Sci.-Macromol. Chem., 7, 251 (1982)

[23] Choe S, Ahn TK, Polym.(Korea), 14(2), 115 (1990)