에틸렌-프로필렌 고무의 물성에 대한 입체 규칙성의 영향

조을룡

Polymer(Korea), Vol.19, No.4, 515-520, July, 1995

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에틸렌-프로필렌 고무의 물성에 대한 입체 규칙성의 영향

Effect of Stereoregularity on the Properties of Ethylene-propylene Rubber

조을룡

초록

에틸렌(E)과 프로필렌(P)의 몰%가 동일(E/P=50/50)하나 입체규칙성이 서로 다른 3종류의 에틸렌-프로필렌 고무들(EPR's)인 random EPR(r-EPR), alternating-EPR(alt-EPR) 및 isotactic-alternating-EPR(iso-alt-EPR)을 사용하여 입체규칙성에 따른 EPR's의 물성을 조사하였다. r-EPR은 용융점이 존재하지 않았으나 alt-EPR과 iso-alt-EPR은 용융점이 존재하며 입체규칙성에 따라 증가하였다. 밀도는 r-EPR < alt-EPR < iso-alt-EPR 순으로 증가하여 입체규칙성과 비례하였다. 인장 강도 시험에서 breaking stress는 입체규칙성에 비례하여 r-EPR < alt-EPR < iso-alt-EPR 순으로 증가하였으며 신장율 시험에서는 반대 현상을 보였다.

Three kinds of ethylene-propylene rubbers (EPR's) having the same ethylene(E)-propylene(P) molar ratio (E/P = 50/50) with different stereoregularity, that is, random EPR(r-EPR), alternating-EPR (alt-EPR) and isotactic-alternating-EPR ( iso-alt-EPR), were used for the investigation of their properties depending on the stereoregularity. No melting point was found in r-EPR. alt-EPR and iso-alt-EPR showed melting points. Density increases in order of r-EPR < alt-EPR < iso-alt-EPR with increasing stereoregularity. In tensile strength test, breaking stress also increases going from r-EPR, alt-EPR, iso-alt-EPR with increase of stereoregularity, but elongation displayed the opposite order.

Keywords:ethylene-propylene rubber;hydrogenation;stereoregularity

[References]

Morton M, "Rubber Technology," p. 260, Van Norstrand Reinhold Company, N.Y. (1987)
Morton M, "Rubber Technology," p. 263, Van Norstrand Reinhold Company, N.Y. (1987)
Schroeder JR, Ph.D. Dissertation, Univ. of Akron (1990)
Gardner IJ, Cozewith C, Strate GV, Rubber Chem. Technol., 44, 1015 (1971)
Wei PE, Anal. Chem., 33, 215 (1961)
Harwood H, Russel DB, Verthe JA, Zymonas J, Makromol. Chem., 163, 1 (1972)
Mango L, Lenz RW, Makromol. Chem., 163, 13 (1973)
Kozulla R, Ph.D. Dissertation, Univ. of AKron (1988)
Odian G, "Principles of Polymerization," 2nd Ed., p. 640, John Wiley & Sons (1981)
Firer E, Ph.D. Dissertation, Univ. of Akron (1973)
Rachapudy H, Smith GG, Raju VR, Graessly WW, J. Polym. Sci., 17, 1211 (1979)
Wunderlich B, "Thermal Analysis," p. 144, Academic Press, N.Y. (1990)
Schultz J, "Polymer Materials Science," p. 216, Prentice Hall, New Jersey (1974)

[1] Morton M, "Rubber Technology," p. 260, Van Norstrand Reinhold Company, N.Y. (1987)

[2] Morton M, "Rubber Technology," p. 263, Van Norstrand Reinhold Company, N.Y. (1987)

[3] Schroeder JR, Ph.D. Dissertation, Univ. of Akron (1990)

[4] Gardner IJ, Cozewith C, Strate GV, Rubber Chem. Technol., 44, 1015 (1971)

[5] Wei PE, Anal. Chem., 33, 215 (1961)

[6] Harwood H, Russel DB, Verthe JA, Zymonas J, Makromol. Chem., 163, 1 (1972)

[7] Mango L, Lenz RW, Makromol. Chem., 163, 13 (1973)

[8] Kozulla R, Ph.D. Dissertation, Univ. of AKron (1988)

[9] Odian G, "Principles of Polymerization," 2nd Ed., p. 640, John Wiley & Sons (1981)

[10] Firer E, Ph.D. Dissertation, Univ. of Akron (1973)

[11] Rachapudy H, Smith GG, Raju VR, Graessly WW, J. Polym. Sci., 17, 1211 (1979)

[12] Wunderlich B, "Thermal Analysis," p. 144, Academic Press, N.Y. (1990)

[13] Schultz J, "Polymer Materials Science," p. 216, Prentice Hall, New Jersey (1974)