가교폴리(4-비닐피리딘)과 메틸오렌지동족체와의 결합에 대한 온도의존성; 7. 요소의 효과

이석기; 장원석; 김우식

Polymer(Korea), Vol.16, No.5, 588-596, September, 1992

Temperature Dependence on the Binding of Methyl Orange and Its Homologs by Crosslinked Poly(4-vinylpyridine); 7.The Effect of Urea

이석기, 장원석, 김우식

초록

가교제 N,N'-헥사메틸렌비스아크릴아미드와 4-비닐피리딘을 라디칼공중합시켜 가교도가 다른 세종류의 가교폴리(4-비닐피리딘)을 합성하였다. 이들 가교고분자와 염료(메틸오렌지, 에틸 오렌지 및 프로필오렌지)와의 결합실험을 몇가지 온도에서 요소존재하의 pH 7의 완충용액중에서 행하고 염료의 평형결합량을 측정하였으며, 이 평형결합량으로 부터 일차적결합상수와 열역학파라메타를 구하였다. 요소농도증가에 따라 일차결합상수와 엔트로피변화는 감소하였다. 이 결과는 요소가 소수성상호작용을 파괴시킨다는 것을 뜻한다. 그럼에도 불구하고 일차결합상수는 온도와 가교도에 대해 종모양의 곡선을 나타내었다. 이 결과는 가교폴리(4-비닐피리딘)의 가교 hole 크기에 의해서 설명될 수 있었다.

Crosslinked poly(4-vinylpyridines) having different degrees of crosslinking were prepared by radical copolymerization of 4-vinylpyridine with N,N'-hexamethylenebisacrylamide as a crosslinker. The binding abilities of these crosslinked polymers to bind dyes(methyl orange, ethyl orange, and propyl orange) were investigated at various temperatures in a buffer solution containing urea. From the equilibrium amounts, the first binding constants and thermodynamic parameters for the bindings were evaluated. The values of first binding constant and entropy change decreased with increasing concentration of urea. This result indicates that urea reduces the hydrophobic interaction between the crosslinked polymers and the dyes. However, the first binding constants showed bell-shaped curves against both the binding temperature and the degree of crosslinking. This result could be explained in terms of the crosslinked hole size.

[References]

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[1] Takagishi T, Dyeing Ind., 36, 33 (1987)

[2] Takagishi T, Takami K, Kuroki N, J. Polym. Sci. A: Polym. Chem., 12, 191 (1974)

[3] Takagishi T, Hosokawa T, Okada M, Kozuka H, J. Polym. Sci. A: Polym. Chem., 24, 3423 (1986)

[4] Takagishi T, Shibano M, Lim YJ, J. Polym. Sci. A: Polym. Chem., 25, 2585 (1987)

[5] Kim WS, Seo KH, Hwang YY, Lee JK, J. Polym. Sci. C: Polym. Lett., 26, 347 (1988)

[6] Kim WS, Lee SK, Seo KH, Polym.(Korea), 14(2), 146 (1990)

[7] Kim WS, Hwang YY, Oh DH, Polym.(Korea), 12(2), 134 (1988)

[8] Kim WS, Hwang YY, Seo KH, Polym.(Korea), 13(9), 733 (1989)

[9] Klotz IM, Shikama K, Atch. Biochem. Biophys., 123, 551 (1968)

[10] Takagishi T, Awano Y, Katayama A, Konishi K, Kuroki N, Sen-I Gakkaishi, 25, 325 (1969)

[11] Klotz IM, Royer GP, Sloniewsky AR, Biochemistry, 8, 4752 (1969)

[12] Takagishi T, Takami K, Kuroki N, J. Polym. Sci. A: Polym. Chem., 13, 437 (1975)

[13] Hickinbottom WJ, Lambert EW, J. Chem. Soc., 1383 (1939)

[14] Kim WS, Lee SK, Polymer, in preparation

[15] Klotz IM, Walken FM, Pivan RB, J. Am. Chem. Soc., 68, 1486 (1946)

[16] Molyneux P, Frank HP, J. Am. Chem. Soc., 83, 3169 (1961)

[17] Takagishi T, Kuroki N, J. Polym. Sci. A: Polym. Chem., 11, 1889 (1973)