용융 가공에 의해 발현된 열 이력의 폴리락트산 섬유의 기계적 물성에 미치는 영향

천상욱; 김수현; 김영하; 강호종; Sang-Wook Chun; Soo-Hyun Kim; Young-Ha Kim; Ho-Jong Kang

Polymer(Korea), Vol.24, No.5, 656-663, September, 2000

Export Citation

용융 가공에 의해 발현된 열 이력의 폴리락트산 섬유의 기계적 물성에 미치는 영향

The Effect of Thermal History Induced by Melt Spinning on the Mechanical Properties of Polylactic Acid Fibers.

천상욱^†, 김수현¹, 김영하¹, 강호종 ²

기능성 고분자 신소재 연구센터, 단국대학교 화학공학과
¹한국과학기술연구원
²단국대학교 고분자공학과

Sang-Wook Chun^†, Soo-Hyun Kim¹, Young-Ha Kim¹, and Ho-Jong Kang²

Department of Chemical Eng., Dankook Univeristy, Seoul 140-714, Korea
¹Korea Institute of Science & Technology, P.O. Box 131, Seoul 130-650, Korea
²Department of Polymer Sci. & Eng., Dankook University, Seoul 140-714, Korea

E-mail:

초록

용융방사에 의한 선형 폴리락트산(polylactic acid, PLLA) 섬유가공에 있어서 가공 시 PLLA에 가해진 열 이력이 섬유의 기계적 특성과 결정화도에 미치는 영향을 살펴보았다. PLLA의 가공 시 가해진 열 이력에 의하여 PLLA의 분자량이 감소하며 이러한 분자량의 감소는 PLLA섬유의 배향도 감소와 결정화도의 감소를 유발시킨다. 그 결과, PLLA 섬유의 인장강도와 탄성계수가 감소하며 신율이 증가됨을 확인할 수 있었다. PLLA의 용융방사에서 발현된 결정화는 PLLA의 느린 결정화 속도에 의하여 thermal induced crystallization보다는 stress induced crystallization에 기인함을 알 수 있었다. PLLA섬유를 열처리하였을 경우, 상대적으로 분자량이 작고 열 이력을 받은 PLLA로 만들어진 섬유가 열 이력을 받지 않은 PLLA로 만들어진 섬유보다 결정화도가 높음을 확인하였다. 이로 보아 열처리에 의한 결정화도의 증가는 stress induced crystallization보다는 thermal induced crystallization에 기인함을 알 수 있었다.

The Effect of thermal history during the melt spinning process ofn the mechanical properties and crystallinity of polylactic acid(PLLA) fibers have been studied. Thermal history applied on PLLA during the melt process caused the decrease of number-average molecular weights and this resulted in the lowering of orientation and crystallinity in PLLA fibers As a results, the longer applied thermal history, the less tensile strength and modulus, and the higher elongation at break. It was also found that primary factor for controllling crystallinity of PLLA fiber was the stress induced crystallization while the thermal induced crystallizaion had a little effect on the crystallinity of PLLA fibers. However, the thermal induced crystallization turn out to be important in the crystallinity developed by annealing of PLLA fibers.

Keywords:poly(L-lactic acid);thermal history;molecular weight;orientation;mechanical properties;crystallinity

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Eling B, Gogolewski S, Pennings A, J. Polym., 23, 1587 (1982)
Hyon SH, Jamshidi K, Ikada Y, "Polymer as a Biomaterials," p. 51, Plenum Press, New York, 1984 (1984)
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Fambri L, Pegoretti A, Fenner R, Incardona SD, Migliaresi C, Polymer, 38(1), 79 (1997)
Mezghani K, Spruiell JE, J. Polym. Sci. B: Polym. Phys., 36(6), 1005 (1998)
Leenslag JW, Pennings A, J. Polym., 28, 1695 (1987)
Gogolewski S, Pennings A, J. Appl. Polym. Sci., 28, 1045 (1983)
Fambri L, Pegoretti A, Mazzurana M, Migliaresi C, J. Mater. Sci. Mater. Med., 5, 679 (1994)
Mattheus F, Goosen A, Zhang X, Polym. Bull., 27, 623 (1992)
Pavan A, Bostio M, Longo T, J. Biomed. Mater. Res., 13, 477 (1979)
Kricheldorf HR, Jonte TM, Makromol. Chem. Suppl., 12, 25 (1985)
Fisher EW, Sterzel HJ, Wegner G, Kolloid-Z. Z. Polym., 251, 980 (1973)
Lorentz HA, Wied. Ann. Phys., 9, 641 (1880)
Shun SW, Kim SH, Kim YH, Kang HJ, in Preparation

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[2] Kulkarni RK, Pani KC, Neuman C, Leonard F, Arch. Surg., 93, 839 (1966)

[3] Lipinsky ES, Sinclair RG, Chem. Eng. Prog., 82, 26 (1986)

[4] Vert M, Angew. Makromol. Chem., 155, 166 (1989)

[5] Lowe CE, U.S. Patent, 2,668,162 (1954)

[6] Schneider AK, U.S. Patent, 3,636,956 (1972)

[7] Wasserman D, U.S. Patent, 3,375,008 (1981)

[8] Chu CC, Willaiam DF, J. Biomed. Mater. Res., 17, 1029 (1983)

[9] Chuand CC, Louis M, J. Appl. Polym. Sci., 30, 3133 (1985)

[10] Li H, Garreau S, Ven M, J. Mater. Sci. Mater. Med., 1, 198 (1990)

[11] Alexander H, Langrana N, Massengill JB, Weiss AB, J. Biomech., 14, 377 (1981)

[12] Huang SJ, Edelman PG, Cameron JA, "Adv. in Biomed. Polymers," p. 101, Plenum, New York, 1987 (1987)

[13] Tsuji H, Horii F, Hyon SH, Ikada Y, Macromolecules, 24, 2719 (1991)

[14] Tsuji H, Ikada Y, J. Appl. Polym. Sci., 53(8), 1061 (1994)

[15] Eling B, Gogolewski S, Pennings A, J. Polym., 23, 1587 (1982)

[16] Hyon SH, Jamshidi K, Ikada Y, "Polymer as a Biomaterials," p. 51, Plenum Press, New York, 1984 (1984)

[17] Penning JP, Dijkstra H, Pennings A, J. Polym., 34, 942 (1993)

[18] Fambri L, Pegoretti A, Fenner R, Incardona SD, Migliaresi C, Polymer, 38(1), 79 (1997)

[19] Mezghani K, Spruiell JE, J. Polym. Sci. B: Polym. Phys., 36(6), 1005 (1998)

[20] Leenslag JW, Pennings A, J. Polym., 28, 1695 (1987)

[21] Gogolewski S, Pennings A, J. Appl. Polym. Sci., 28, 1045 (1983)

[22] Fambri L, Pegoretti A, Mazzurana M, Migliaresi C, J. Mater. Sci. Mater. Med., 5, 679 (1994)

[23] Mattheus F, Goosen A, Zhang X, Polym. Bull., 27, 623 (1992)

[24] Pavan A, Bostio M, Longo T, J. Biomed. Mater. Res., 13, 477 (1979)

[25] Kricheldorf HR, Jonte TM, Makromol. Chem. Suppl., 12, 25 (1985)

[26] Fisher EW, Sterzel HJ, Wegner G, Kolloid-Z. Z. Polym., 251, 980 (1973)

[27] Lorentz HA, Wied. Ann. Phys., 9, 641 (1880)

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