지방족 Copolyester 및 Copolyesteramide의 합성과 분해성(1)

김우식; 김성구; 김성진; 지병철

Polymer(Korea), Vol.19, No.1, 11-18, January, 1995

Export Citation

지방족 Copolyester 및 Copolyesteramide의 합성과 분해성(1)

Synthesis and Degradability of Aliphatic Copolyester and Aliphatic Copolyesteramide(1)

김우식, 김성구, 김성진, 지병철

초록

이 연구에서는 촉매로서 tetraphenyltin을 사용하여 D.L-lactide(LA)와 δ-valerolactone (VL)의 공중합체를 합성하고 그 물성을 조사하였다. 공중합시간이 길어짐에 따라 생성된 공중합체의 VL의 조성은 증가하였다. 이것은 공중합성이 LA가 VL보다 크다는 것을 의미한다. 또 공중합시간이 길어짐에 따라 생성된 공중합체의 분자량이 증가하였다. 이것은 이 중합기구가 배위삽입반응을 포함하는 것을 시사한다. 수평균분자량은 18,000∼59,000였고 다분산성지수는 1.8∼2.5였다. 공중합체는 융점은 나타내지 않고 유리전이온도(T_g)만 나타내었다. T_g는 공중합체중의 VL의 조성이 증가함에 따라 감소하였다. Lipase에 의한 이 공중합체의 분해성은 LA 단일중합체보다 컸다.

D.L-Lactide(LA) was copolymerized with δ-valerolactone(VL) using tetraphenyltin as a catalyst and the properties of the copolymers were investigated. The composition of VL in the copolymers increased with increasing the copolymerization time. This suggests that the reactivity of LA is larger than that of VL. Also, the molecular weights of the copolymers increased with increasing the time. This means that the copolymerization involves an insertion reaction mechanism. The number average molecular weight of the copolymers was in the range of 18,000 to 59,000 and the polydispersity index was in the range of 1.8 to 2.5. The copolymers did not show melting points, but glass transition temperatures(T_g). The T_g of the copolymers decreased with increasing the composition of VL in the copolymers. The degradability of the copolymers with lipase was larger than that of the homopolymer of LA.

Keywords:copolyester;lactide;valerolactone;synthesis;degradability

[References]

Williams DF, Mort E, J. Bioeng., 1, 231 (1977)
Makino K, Anakawa M, Endo T, Chem. Pharm. Bull., 33, 1195 (1985)
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Gliding DK, Reed AM, Polymer, 20, 1459 (1979)
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Dittrich W, Schulty RC, Angew. Makromol. Chem., 241, 109 (1971)
Kricheldorf HR, Dunsing R, Makromol. Chem., 187, 1611 (1986)
Vion JM, Jerome R, Aubin TM, Prudhomme RE, Macromolecules, 19, 1828 (1986)
Fukuzaki H, Yoshida M, Asano M, Aiba Y, Kaetsu I, Eur. Polym. J., 24, 1029 (1988)
Kricheldorf HR, Berl M, Scharnagl N, Macromolecules, 21, 286 (1988)

[Referenced By]

[1] Williams DF, Mort E, J. Bioeng., 1, 231 (1977)

[2] Makino K, Anakawa M, Endo T, Chem. Pharm. Bull., 33, 1195 (1985)

[3] Tokiwa Y, Suzuki T, Takeda K, Agric. Biol. Chem., 50, 1323 (1986)

[4] Feng XD, Song CX, Chem WY, J. Polym. Sci. C: Polym. Lett., 21, 593 (1983)

[5] Song CX, Feng XD, Macromolecules, 17, 2764 (1984)

[6] Gripma DW, Pennings AJ, Polym. Bull., 25, 335 (1991)

[7] Gliding DK, Reed AM, Polymer, 20, 1459 (1979)

[8] Konn FE, Ummen JGV, Feijen J, Eur. Polym. J., 19, 1081 (1983)

[9] Dunsing R, Kricheldorf HR, Polym. Bull., 14, 491 (1985)

[10] Leensiag JW, Gogolewski S, Pennings AJ, J. Appl. Polym. Sci., 29, 2829 (1984)

[11] Dittrich W, Schulty RC, Angew. Makromol. Chem., 241, 109 (1971)

[12] Kricheldorf HR, Dunsing R, Makromol. Chem., 187, 1611 (1986)

[13] Vion JM, Jerome R, Aubin TM, Prudhomme RE, Macromolecules, 19, 1828 (1986)

[14] Fukuzaki H, Yoshida M, Asano M, Aiba Y, Kaetsu I, Eur. Polym. J., 24, 1029 (1988)

[15] Kricheldorf HR, Berl M, Scharnagl N, Macromolecules, 21, 286 (1988)