화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.11, No.3, 318-322, May, 2000
Export Citation
Poly(ethylene terephthalate)를 이용한 수분산 폴리우레탄의 제조와 상분리 특성
Preparation and Phase Separation of Water-Born Polyurethane Based on Poly (ethylene terephthalate)
김병철, 김완영, 이대수†
  • 전북대학교 공과대학 화학공학부, 전주 561-756
Byung Chul Kim, Wan Young Kim, and Dai Soo Lee†
  • Faculty of Chemical Engineering and Technology, Chonbuk National University, Chonju 561-756, Korea
E-mail:
초록
폴리에틸렌테레프탈레이트(poly(ethylene terephthalate): PET)를 글리콜리시스시킨 다음 아디프산과 축합을 통하여 제조한 폴리올을 이용하여 수분산 폴리우레탄(polyurethane: PU)을 제조하였다. 수분산 PU의 제조를 위하여는 폴리올과 dimethylol propionic acid로 prepolymer를 합성하고, 쇄연장제로는 hydrazine과 methyl ethyl ketone으로부터 얻어진 잠재성 경화제인 ketazine을 사용하였다. 제조된 수분산 PU는 분산상 입경이 0.2㎛ 정도인 라텍스 상태였다. 제조 후 건조된 PU의 상분리 특성을 시차주기열량기를 이용하여 열처리에 따른 유리전이온도 변화로 조사하였다. PU 중 PET 함량이 많을수록 PU의 연질부와 경질부의 초기 상분리는 빠르고, 상부리 후 연질부 유리전이온도가 높게 나타났다. 또한 PET의 글리콜리시스를 위하여 디에틸렌글리콜을 사용한 것보다 에틸렌글리콜을 사용한 경우 PU의 초기 상분리가 바르고 연질부 유리전이온도가 높게 나타났다. 한편 PU의 초기 상분리는 열처리 온도가 낮을수록 빠르고 후기 상분리는 열처리 온도가 높을수록 빠르게 나타났다. PU의 초기 상분리는 연질부와 경질부의 상용성에 의존하고 PU의 후기 상분리는 확산 특성에 주로 의존하는 것으로 판단되었다.
Water-born polyurethane (PU) based on poly(ethylene terephthalate) (PET) was synthesized using the polyols prepared by condensation polymerization of glycolysis product of PET and adipic acid. In order to prepare water-born PU, PU prepolymers were synthesized from the polyols, dimethylol propionic acid, and toluene diisocyanate, and a ketazine was employed as a latent hard and chain extended by a latent hardener, ketazine prepared from hydrazinc and methylethly ketone. Average particle size of the water-born PU latex was ca. 0.2㎛. Phase separation of the PU after drying was investigated by differential scanning calorimetry. It was found that the rate of initial phase separation of soft segment and hard segment in the PU (Ri) increased with the PET content in the PU. The Ri of the PU based on glcolysis product of PET and ethylene glycol was faster than that of the PU based on glycolsis product of PET and diethylene glycol. The Ri at 60℃ was faster than that at 90℃ whereas the phase separation rate of the PU in the late stage (Ri> at 90℃ was faster than that at 60℃. It is speculated that Ri is mainly affected by the miscibility of the soft segment with hard segment of the PU, whereas Ri is affected by the diffusion propetry of the soft segment of the PU.
Keywords:water-born polyurethane;poly(ethylene terephthalate);phase separation
  1. Hepburn C, Polyurethane Elastomers, Elsevier Science, New York (1992)
  2. Oertel G, Polyurethane Handbook, 2nd Ed., Carl Hanser Verlag, Munich (1994)
  3. Szycher M, Szycher's Handbook of Polyurethane, Chapter 1, CRC Press, Boca Raton (1999)
  4. Dieterich D, Prog. Org. Coat., 9, 281 (1981) 
  5. Dieterich D, Advances in Urethane Ionomers, Edt. by H.X. Xiao and K.C. Frisch, Chapter 1, Technomic Publishing, Lancastor (1995)
  6. Hespe HF, Zembrod A, Cama FJ, Lantman CW, J. Appl. Polym. Sci., 44, 2029 (1992) 
  7. Lee HS, Hsu SL, Macromolecules, 22, 110 (1989)
  8. Kim BK, Lee YM, Advances in Urethane Ionomers, Edt. by H.X. Xiao and K.C. Frisch, Chapter 4, Technomic Publishing, Lancastor (1995)
  9. Martin DJ, Meijs GF, Renwick GM, Mccarthy SJ, Gunatillake PA, J. Appl. Polym. Sci., 62(9), 1377 (1996) 
  10. DeLeon A, Chemical Aspects of Plastics Recycling, Edt. by W. Hoyle and D.R. Karsa, p. 86, The Royal Society of Chemistry, Cambridge (1997)
  11. U.S. Patent, 4,269,748 (1981)
  12. Chee KK, Farris RJ, J. Appl. Polym. Sci., 29, 2529 (1984) 
  13. Camberlin Y, Pascault JP, J. Polym. Sci. A: Polym. Chem., 21, 415 (1983)
  14. Wilkes GL, Wildnauer R, J. Appl. Phys., 46, 4148 (1975) 
  15. Kwei TK, J. Appl. Polym. Sci., 27, 2891 (1982)