PET 필름의 이축연신에 따른 물성변화 연구

이중규; 박상호; 김성훈; Jung Gyu Lee; Sang Ho Park; Seong Hun Kim

Polymer(Korea), Vol.34, No.6, 579-587, November, 2010

Export Citation

PET 필름의 이축연신에 따른 물성변화 연구

Investigation of Properties of the PET Film Dependent on the Biaxial Stretching

이중규^{1, 2}, 박상호¹, 김성훈 ^{1, †}

¹한양대학교 공과대학 섬유고분자공학과
²SKC 첨단기술중앙연구소

Jung Gyu Lee^{1, 2}, Sang Ho Park¹, and Seong Hun Kim^{1, †}

¹Department of Fiber and Polymer Engineering, College of Engineering, Hanynang University, 17 Haengdang, Seongdong, Seoul 133 -791, Korea
²SKC Advanced Technology R&D Center, 911 Chongja-1, Changan, Suwon, Gyeonggi 440-301, Korea

E-mail:

초록

PET 필름의 물성을 연구하기 위하여 PET의 Tm 보다 높은 다양한 온도에서 압출 후, 18 ℃로 급냉하였고, 종방향(MD)과 횡방향(TD)으로 각기 다른 연신비 및 다양한 열고정 온도로 제조되었다. 압출 온도, 연신비, 열고정 온도에 따른 PET 필름의 열수축 거동, 밀도, 결정화거동, 열적거동 및 광학적 물성 등의 변화에 대하여 고찰한 결과, MD와 TD 방향의 열수축률은 열처리온도와 압출 온도가 감소함에 따라 증가하였고 연신비가 증가함에 따라 증가하였다. 결정화도와 밀도는 열처리온도와 압출 온도가 증가함에 따라 증가하였고, 융해열(ΔH )과 예비융점(Tm’)의 경우 열처리온도와 압출 온도의 증가와 함께 증가하였다. 수평균 분자량과 고유점도는 압출 온도가 증가함에 따라 감소하였고, 인장강도와 탄성률의 경우 연신비가 증가함에 따라 증가하였으나, 열처리온도를 증가하였을 때에는 감소하는 경향을 보였다. 연신 방향과 두께 방향의 굴절률은 연신비와 열처리온도가 증가함에 따라 증가함을 확인하였다.

To investigate the properties of PET films, PET films were extruded at various temperature above Tm and quenched at 18 ℃ for amorphous sheet, and stretched along a direction defined as the machine direction (MD) with a transverse direction (TD) above Tg at various stretching ratios and then annealed at various temperatures produced by SKC PET line. Thermal shrinkage of MD and TD increased with decreasing annealing temperature and extruding temperature, and increasing stretching ratio. The degree of crystallinity, density, heat of fusion (ΔH ) and pre-melting point (Tm’) increased with increasing annealing temperature and extruding temperature. Number average molecular weight (Mn) and intrinsic viscosity decreased with increasing extruding temperature. Tensile strength and modulus increased with increasing stretching ratio, however decreased with increasing annealing temperature. Reflective index of both stretching and thickness direction increased with increasing stretching ratio and annealing temperature.

Keywords:PET;film;drawing;stretching

[References]

Dumbleton JH, Bowels BB, J. Polym. Sci. A-2, 4, 51 (1966)
Mocherla KK, Bell JP, J. Polym. Sci.: Polym. Phys. Ed., 11, 1779 (1973)
Andarianova GP, Arutyunor BA, Popov YV, J. Polym. Sci.: Polym. Phys. Ed., 16, 1139 (1978)
Bhat NV, Naik SG, Textile Res. J., 54, 868 (1984)
Ribnick A, Textile Res. J., 39, 428 (1969)
Groeninckx G, Reynaeers H, Berghmans H, Smets G, J. Polym. Sci.: Polym. Phys. Ed., 18, 1311 (1980)
Groeninckx G, Reynaeers H, Berghmans H, Smets G, J. Polym. Sci.: Polym. Phys. Ed., 18, 1325 (1980)
Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1865 (1981)
Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1878 (1981)
Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1885 (1981)
Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1896 (1981)
Chang DH, J. Korean Soc. Text. Eng. Chem., 20, 37 (1983)
Gohil RM, J. Appl. Polym. Sci., 48, 1635 (1993)
Gohil RM, J. Appl. Polym. Sci., 48, 1649 (1993)
Gohil RM, Salem DR, J. Appl. Polym. Sci., 47, 1989 (1993)
Gohil RM, J. Appl. Polym. Sci., 52(7), 925 (1994)
Rao MVS, Kumar R, Dweits NE, J. Appl. Polym. Sci., 32, 4439 (1986)
Chang DH, J. Korean Soc. Text. Eng. Chem., 20, 37 (1983)
Chang DH, Schultz JM, Gohil RM, J. Macromol. Sci. Phys., B32, 99 (1992)
Lee KG, Schultz JM, Polymer, 34, 4455 (1993)
Chang DH, Lee KG, Schultz JM, J. Macromol. Sci. Phys., B33, 105 (1993)

[Referenced By]

[Related Articles]

[1] Dumbleton JH, Bowels BB, J. Polym. Sci. A-2, 4, 51 (1966)

[2] Mocherla KK, Bell JP, J. Polym. Sci.: Polym. Phys. Ed., 11, 1779 (1973)

[3] Andarianova GP, Arutyunor BA, Popov YV, J. Polym. Sci.: Polym. Phys. Ed., 16, 1139 (1978)

[4] Bhat NV, Naik SG, Textile Res. J., 54, 868 (1984)

[5] Ribnick A, Textile Res. J., 39, 428 (1969)

[6] Groeninckx G, Reynaeers H, Berghmans H, Smets G, J. Polym. Sci.: Polym. Phys. Ed., 18, 1311 (1980)

[7] Groeninckx G, Reynaeers H, Berghmans H, Smets G, J. Polym. Sci.: Polym. Phys. Ed., 18, 1325 (1980)

[8] Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1865 (1981)

[9] Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1878 (1981)

[10] Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1885 (1981)

[11] Gupta VB, Kumar S, J. Appl. Polym. Sci., 26, 1896 (1981)

[12] Chang DH, J. Korean Soc. Text. Eng. Chem., 20, 37 (1983)

[13] Gohil RM, J. Appl. Polym. Sci., 48, 1635 (1993)

[14] Gohil RM, J. Appl. Polym. Sci., 48, 1649 (1993)

[15] Gohil RM, Salem DR, J. Appl. Polym. Sci., 47, 1989 (1993)

[16] Gohil RM, J. Appl. Polym. Sci., 52(7), 925 (1994)

[17] Rao MVS, Kumar R, Dweits NE, J. Appl. Polym. Sci., 32, 4439 (1986)

[18] Chang DH, J. Korean Soc. Text. Eng. Chem., 20, 37 (1983)

[19] Chang DH, Schultz JM, Gohil RM, J. Macromol. Sci. Phys., B32, 99 (1992)

[20] Lee KG, Schultz JM, Polymer, 34, 4455 (1993)

[21] Chang DH, Lee KG, Schultz JM, J. Macromol. Sci. Phys., B33, 105 (1993)