나프탈이미도알킬메타크릴레이트와 스티렌의 공중합과 그들 공중합체의 형광특성

김우식; 홍기헌; 남춘래; 서관호

Polymer(Korea), Vol.18, No.3, 285-291, May, 1994

Export Citation

나프탈이미도알킬메타크릴레이트와 스티렌의 공중합과 그들 공중합체의 형광특성

Copolymerization of Naphthalimidoalkylmethacrylates with Styrene and Fluorescence Behavior of Their Copolymers

김우식, 홍기헌, 남춘래, 서관호

초록

60℃에서 디메틸포름아미드중에서 아조비스이소브틸로니트릴을 개시세로 사용하여 나프탈이미도에틸메타크릴레이트 (NIEM) 및 나프탈이미도부틸메타크릴레이트(NIBM)를 스티렌(ST)과 각각 공중합하였다. 공숭합체의 조성은 자외선분광광도법으로_분석하였다. 공중합의 단량체 반응성비와 NIEM 및 NIBM의 공명효과(Q) 및 극성효과(e)를 구하였다. NIEM(1)-ST(2) r₁=0.28, r₂=0.36, Q₁=0.84, e₁=0.72 NIBM(1)-ST(2) r₁=0.29, r₂=0.40, Q₁=0.78, e₁=0.67 r₁과 r₂의 곱은 NIEM-ST 공중합체와 NIBM-ST공중합체가 큰 교호성을 가지는 것을 시사한다. 이들 공중합체는 380nm에서 단량체발광띠와 460nm에서 엑시마발광띠를 나타내었다. NIBM-ST공합체의 단량체발광강도에 대한 엑시마발광강도비는 NIEM-ST 공중합체의 그 비보다 컸다. 공중합체에 대한 이 경향은 이전 연구에서의 poly(NIEM)과 poly(NIBM)의 경향과 일치하였다.

Naphthalimidoethylmethacrylate(NIEM) and naphthalimidobutylmethacry1 ate(NIBM)were copolymerized with styrene (ST) using : azobisisobutyronitrile as an initiator in dimethylformamide at 60℃, respectively. The compositions of the copolymers were analyzed by ultra-violet spectrophotometry. The monomer reactivity ratios for the systems and Alfrey-Price's resonance effect(Q) and polar effect(e) values for NIEM and NIBM were determined as follows : NIEM(1)-ST(2) r₁=0.28, r₂=0.36, Q₁=0.84, e₁=0.72 HIBM(1)-ST(2) r₁=0.29, r₂=0.40, Q₁=0.78, e₁=0.67 The product of r₁ and r₂ suggests that poly(NIEM-co-ST) and poly(NIBM-co-ST) have a greatly alternating tendency. The copolymers were observed to exhibit a monomer emission band at 380 nm and an excimer emission band at 460 nm. The ratios of the excimer to the monomer emission intensities of poly(NIBM-co-ST) were higher than those of poly(NIEM-co-ST). The tendency for the copolymers agreed with that for poly(NIEM)and poly(NIBM) in our previous paper.

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[1] Frank CW, Harrah LA, J. Chem. Phys., 61, 1526 (1974)

[2] Kim WS, Oh DH, Seo KH, Polym. Commun., 29, 108 (1988)

[3] Kim WS, Oh DH, Chang WS, Seo KH, Polym. J., 26, 397 (1994)

[4] Merle-Aubry L, Holden A, Merle Y, Guillet JE, Macromolecules, 13, 1138 (1980)

[5] Ueno A, Osa T, Toda F, J. Polym. Sci. C: Polym. Lett., 16, 539 (1978)

[6] Holden DA, Wang PYK, Guillet JE, Macromolecules, 13, 295 (1980)

[7] Nakahira T, Maruyama I, Iwabuchi S, Kojima K, Makromol. Chem., 180, 1853 (1979)

[8] Kelen J, Tudos F, J. Macromol. Sci.-Chem., A9(1), 1 (1975)

[9] Seymour RB, Carraher CE, "Polymer Chemistry," 2nd ed., by J.J. Lagowski, p. 360, Marcel Dekker, New York and Basel (1988)

[10] Alfrey T, Price CC, J. Polym. Sci., 2, 101 (1947)

[11] "Polymer Handbook," 3rd ed. by J. Brandrup and E.H. Immergut, II/268, John Wiley & Sons, New York (1989)