화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.27, No.6, 509-520, November, 2003
Export Citation
신디오택틱 폴리프로필렌과 아이소택틱 폴리프로필렌의 결정화 거동 비교
Comparison of the Crystallization Behavior of Syndiotactic Polypropylene and Isotactic Polypropylene
이상원†, 허완수, 현욱, 이동호1, 노석균2
  • 숭실대학교 환경화학공학과, 서울 156-743
  • 1경북대학교 고분자공학과, 대구 702-701
  • 2영남대학교 화학공학부, 대구 702-701
Sang-Won Lee†, Wansoo Huh, Uk Hyun, Dongho Lee1, and Seok Kyun Noh2
  • Department of Chemical and Enviromental Engineering, Soongsil University, 1-1, Sangdo-dong, Dongjak-gu, Seoul 156-743, Korea
  • 1Department of Polymer Science, Kyungpook National University, 1370, Sangyeok-dong, Buk-gu Daegu 702-701, Korea
  • 2School of Chemical Engineering and Technology, Youngnam University, 214-1, Dae-dong, Gyeongsan 712-749, Korea
E-mail:
초록
입체규칙성이 다른 폴리프로필렌(PP)의 결정화 거동을 비교하였다. 결정화 조건은 신디오택틱 폴리프로필렌(sPP)과 아이소택틱 폴리프로필렌(iPP)의 단위 결정 격자, 라멜라 구조, 구정의 성장에 영향을 주었다. 냉각속도가 증가할수록 결정 구조의 안정성이 감소하였으며, 냉각속도에 따른 구조적 변화는 iPP가 sPP보다 크게 나타났다. sPP는 1 ℃/min 이하의 속도로 서냉될 때 body centered cell III의 fully antichiral packing 구조를 형성하였고 sPP가 primitive cell II구조를 형성할 때, 결정 격자와 라멜라 구조는 열이력의 영향을 작게 받은 것으로 확인되었다. 최대 결정화 온도에서 결정화 속도는 iPP가 sPP보다 빠르게 나타났다.
The study was made to compare the crystallization behavior of polypropylene (PP) with different stereo-regularity. The unit cell parameters, lamellar structure of PP, and the growth of thieir spherulites were strongly dependent upon the crystallization condition. It was shown that metastable structure appeared with increasing cooling rate. The structural change of isotactic PP (iPP) was larger than that of syndiotactic PP (sPP). The crystal structure of sPP showed body centered cell III when it is cooled down with 1 ℃/min. When sPP was grown to primitive cell II structure, both unit cell and lamellar structure were less affected by a cooling rate. The overall crystallization rate of iPP was faster than that of sPP.
Keywords:crystallization;kinetics;crystal structure;polypropylene
  1. Park JM, Eom KY, Polym.(Korea), 21(3), 419 (1997)
  2. Thomann R, Kressler J, Setz S, Wang C, Mulhaupt R, Polymer, 37(13), 2627 (1996) 
  3. Phillips RA, Jones RL, Macromol. Chem. Phys., 200, 1912 (1999) 
  4. Jin J, Ok J, Kim SS, Song K, Polym.(Korea), 22(6), 1027 (1998)
  5. Ozawa T, Polymer, 12, 1142 (1979)
  6. Hobbs SJ, Partt CF, Polymer, 16, 462 (1975) 
  7. Groeninckx G, Reynaers H, Berghmans H, Smets G, J. Polym. Sci. B: Polym. Phys., 16, 261 (1980)
  8. Sahenoy AV, Saini DR, Thermochim. Acta, 126, 25 (1998) 
  9. Khanna YP, Taylor TJ, Polym. Eng. Sci., 28, 1042 (1988) 
  10. Vasile C, Seymour RB, Handbook of Polyolefins, Marcel Dekker Inc., New York (1993)
  11. Ziabicki A, J. Chem. Phys., 85, 3042 (1986) 
  12. Muschik H, Colloid Polym. Sci., 261, 908 (1983) 
  13. Lovinger AJ, Lotz B, Davis DD, Schumacher M, Macromolecules, 27(22), 6603 (1994) 
  14. Rodriguezarnold J, Zhang AQ, Cheng SZ, Lovinger AJ, Hsieh ET, Chu P, Johnson TW, Honnell KG, Geerts RG, Palackal SJ, Hawley GR, Welch MB, Polymer, 35(9), 1884 (1994) 
  15. Wunderlich B, Macromolecular Physics, Academic Press, London (1973)
  16. Foeign LA, Svergun KI, Structure Analysis by Small-Angle X-ray and Neutron Scattering, Plenum Press, New York (1987)
  17. Strobl GR, Schneider M, J. Polym. Sci. B: Polym. Phys., 18, 1343 (1980)
  18. Imai M, Kaji K, Kanaya T, Macromolecules, 27(24), 7103 (1994) 
  19. Thomann R, Kressler J, Rudolf B, Mulhaupt R, Polymer, 37(13), 2635 (1996) 
  20. Elizabeth J, Clark J, Hoffman D, Macromolecules, 17, 878 (1984)