Poly[terephthaloyl-1-(2-aminoethyl)piperazine]연쇄의 굴곡성

하헌승; 이동주

Polymer(Korea), Vol.15, No.2, 175-181, April, 1991

Export Citation

Poly[terephthaloyl-1-(2-aminoethyl)piperazine]연쇄의 굴곡성

Semiflexible Chain Behavior of Poly(terephthaloyl- 1-(2-aminoethyl) piperazine]

하헌승, 이동주

초록

Poly[terephthaloyl-1-(2-aminoethyl)piperazine](PTAP)의 분별시료들에 대한 극한점성도계수를 측정하여 주사슬의 유연성 변화를 검토하였다. 분별시료들의 수평균 분자량 범위는 1.33 x 10⁴에서 9.88 x 10⁴g/mol이었고, 본성점도는 25℃, m-cresol용액을 사용하여 측정하였다. 이들 값으로부터 PTAP의 입체적 분자형태가 분자량 증가에따라 반굴곡성 형태로부터 확장된 coil형으로 변하는 것을 확인하였으며 Bohdanecky이론에 근거한 worm-like cylinder의 model parameter값들을 산출한 결과 persistence length(q)값이 4.35nm, 단위 contour length당 분자량(M_L)이 260nm^-1, 및 root평균 양말단간 거리[(2>₀/M)^1/2]값이 1,830 x 10^-4nm인 것으로 밝혀졌다.

Intrinsic viscosities [η] of poly[terephthaloyl-1-(2-aminoethyl)piperazine] PTAP) in mcresol at 25℃ were determined for well fractionated samples ranging in number average molar mass from 1.33 x 10⁴ to 9.88 x 10⁴ g/mol. The measured values of [η] indicated the chain conformation of PTAP to change continuously from a semiflexible chain to a long extended coil with an increase in molar mass. Viscometric data analysis on the basis of Bohdaneckey theory for worm-like cylinders yielded values 4.35nm, 260nm^-1, and 1830 x 10^-4nm which were assigned to the persistence length, the molar mass per unit contour length, and the root mean square end to end distance, respectively.

[References]

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[1] Bohdanecky M, Macromolecules, 16, 1483 (1983)

[2] Morgan PW, Kwolek SL, J. Polym. Sci. A: Polym. Chem., 2, 181 (1964)

[3] Katz M, J. Polym. Sci. A: Polym. Chem., 40, 337 (1959)

[4] Huggins ML, J. Am. Chem. Soc., 64, 2716 (1942)

[5] Kraemer EO, Ind. Eng. Chem., 30, 1200 (1938)

[6] Elias HG, Makromol. Chem., 33, 140 (1959)

[7] Yamakawa H, "Modern Theory of Polymer Solutions," Harper & Row, New York (1971)

[8] Miyaky Y, Einaga Y, Fujita H, Macromolecules, 11, 1180 (1978)

[9] Fujita H, Norisuye T, Macromolecules, 18, 1637 (1985)

[10] Yamakawa H, Fujii M, Macromolecules, 7, 128 (1974)

[11] Yamakawa H, Yoshizaki T, Macromolecules, 13, 533 (1975)

[12] Tsujii T, Norisuye T, Fujita H, Polym. J., 7, 588 (1975)

[13] Yanaki T, Norisuye T, Fujita H, Macromolecules, 13, 1462 (1980)

[14] Matsuoka M, Norisuye T, Teramoto A, Fujita H, Biopolymer, 12, 1515 (1973)

[15] Murakami H, Norisuye T, Fujita H, Macromolecules, 13, 345 (1980)

[16] Motowoka M, Fujita H, Norisuye T, Polym. J., 10, 331 (1978)

[17] Brandrup J, Immergut EH, "Polymer Handbook," 3rd Ed., John Wiley & Sons, New York (1989)