FTIR Specular Reflection을 이용한 Isotactic Polypropylene 표면의 배향 연구

이상준; 박현길; 손영곤; 구정기; 송기국

Polymer(Korea), Vol.22, No.5, 802-808, September, 1998

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FTIR Specular Reflection을 이용한 Isotactic Polypropylene 표면의 배향 연구

Characterization of Surface Orientation in Isotactic Polypropylene by Specular Reflection FTIR Spectroscopy

이상준, 박현길, 손영곤, 구정기, 송기국

초록

FTIR Specular Reflection을 이용하여 사출성형된 i-PP 시편 표면에서의 고분자사슬의 배향에 관한 조사를 하였다. Specular Reflection 실험방법에 의해 얻어진 스펙트럼으로부터 Kramers-Kronig transformation을 이용하여 absorption index 스펙트럼을 얻었고, 각 편광에서의 반사에 따른 보정상수를 Hansen''s expansion formula로부터 구한 후 absorption index 스펙트럼에 적용하여 IR dichroism을 조사하였다. i-PP 시편에서의 위치에 따른 배향을 조사하기 위하여 i-PP 결정상의 특성피크인 997 cm^-1 band의 dichroic ratio를 측정하였다. 사출성형된 시편에서 사출방향으로 사슬들이 배향이 되었으며, 시편의 각 지점에 따라 배향된 정도가 다름도 확인할 수 있었다. 또한 이 시편을 130℃에서 열처리 하였을 때 사슬들의 배향과 결정화도가 증가함을 알 수 있었다.

Using an FTIR specular reflection technique, surface orientation of the injection molded i-PP sample was investigated. By applying Kramers-Kronig transformation to the IR spectra obtained from the specular reflection technique, absorption index spectra were obtained. Dichroic ratio was derived from the polarized absorption index spectra which had been corrected with a reflectivity correction factor calculated using Hansen''s expansion formula. To determine orientation of the i-PP sample, we measured dichroic ratio of the 997 cm^-1 peak which is a characteristic band of the i-PP crystalline phase. It was shown that the orientation direction, even slightly different from each position of the injection molded sample, was almost parallel to the injection direction. It was also found that dichroic ratio and crystallinity of the i-PP sample were increased after annealing at 130 ℃.

Keywords:FTIR;specular reflection;polypropylene;polarized IR;chain orientation

[References]

Samuels RJ, Macromol. Chem., 4, 241 (1981)
Snyder RG, Schachtschneider JH, Spectrochimica, 20, 853 (1964)
Cole KC, Guevremant J, Ajji A, Dumoulin MM, Appl. Spectroscopy, 48(12), 1513 (1994)
Claybourn M, Colombel P, Chalmers J, Appl. Spectroscopy, 45(2), 279 (1991)
Guevremont J, Ajji A, Cole KC, Dumoulin MM, Polymer, 36(17), 3385 (1995)
Kaito A, Nakayama K, Macromolecules, 25, 4882 (1992)
Harrick NJ, Appl. Spectroscopy, 31, 548 (1997)
Ok J, Song K, Polym.(Korea), 20(6), 1042 (1996)
Coleman PB, "Practical Sampling Techniques for Infrared Analysis," CRC Press Inc., London (1993)
Garton A, "Infrared Spectroscopy of Polymer Blends, Composites, and Surfaces," Carl Hanser Verlag, New York (1992)
Brandrup J, Immergut EH, "Polymer Handbook," 3rd ed., John Wiley & Sons (1989)
Lipson SG, "Optical Physics," 2nd ed., Cambridge University Press, Cambridge (1981)
Ishino Y, Ishida H, Appl. Spectroscopy, 46(3), 504 (1992)
Karger-Kocssis J, "Polypropylene Structure, Blends and Composites," vol. 1, Chapman & Hall, Cambridge (1995)
Kissin YV, Rishina LA, Eur. Polym. J., 12, 757 (1976)
Pirnia A, Sung CSP, Macromolecules, 21, 2699 (1988)
Jin J, Ok J, song K, Polym. Abstr., 22(2), 82 (1997)
Murthy NS, Bray RG, Correale ST, Moore RA, Polymer, 36(20), 3863 (1995)

[1] Samuels RJ, Macromol. Chem., 4, 241 (1981)

[2] Snyder RG, Schachtschneider JH, Spectrochimica, 20, 853 (1964)

[3] Cole KC, Guevremant J, Ajji A, Dumoulin MM, Appl. Spectroscopy, 48(12), 1513 (1994)

[4] Claybourn M, Colombel P, Chalmers J, Appl. Spectroscopy, 45(2), 279 (1991)

[5] Guevremont J, Ajji A, Cole KC, Dumoulin MM, Polymer, 36(17), 3385 (1995)

[6] Kaito A, Nakayama K, Macromolecules, 25, 4882 (1992)

[7] Harrick NJ, Appl. Spectroscopy, 31, 548 (1997)

[8] Ok J, Song K, Polym.(Korea), 20(6), 1042 (1996)

[9] Coleman PB, "Practical Sampling Techniques for Infrared Analysis," CRC Press Inc., London (1993)

[10] Garton A, "Infrared Spectroscopy of Polymer Blends, Composites, and Surfaces," Carl Hanser Verlag, New York (1992)

[11] Brandrup J, Immergut EH, "Polymer Handbook," 3rd ed., John Wiley & Sons (1989)

[12] Lipson SG, "Optical Physics," 2nd ed., Cambridge University Press, Cambridge (1981)

[13] Ishino Y, Ishida H, Appl. Spectroscopy, 46(3), 504 (1992)

[14] Karger-Kocssis J, "Polypropylene Structure, Blends and Composites," vol. 1, Chapman & Hall, Cambridge (1995)

[15] Kissin YV, Rishina LA, Eur. Polym. J., 12, 757 (1976)

[16] Pirnia A, Sung CSP, Macromolecules, 21, 2699 (1988)

[17] Jin J, Ok J, song K, Polym. Abstr., 22(2), 82 (1997)

[18] Murthy NS, Bray RG, Correale ST, Moore RA, Polymer, 36(20), 3863 (1995)