화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.29, No.4, 344-349, July, 2005
Export Citation
무용제 반응에 의한 폴리에스테르계 폴리우레탄의 합성 및 특성
Synthesis and Properties of Polyester System Polyurethane without Solvent
곽노석, 양윤규, 정부영, 황택성†
  • 충남대학교 공과대학 화학공학과
Noh-Seok Kwak, Yun-Kyu Yang, Boo-Young Jeong, and Taek-Sung Hwang†
  • Department of Chemical Engineering, College of Engineering, Chungnam National University, Daejeon 305-764, Korea
E-mail:
초록
분자량이 다른 여러 종류의 폴리카프로락톤 디올(polycaprolactone diol), 폴리카프로락톤 트리올(polycaprolactonetriol), acetylbutyl citrate 가소제, isophorone diisocyanate 경화제를 이용하여 폴리우레탄을 합성하였다. 합성된 폴리우레탄의 구조를 FT-IR, NMR 스펙트럼 분석을 통하여 확인하였고 TGA와 UTM을 이용하여 열특성 및 인장강도 연신율을 측정하였다. Compressive modulus를 사용하여 측정한 결과, 합성한 폴리우레탄의 가교 평균 분자량은 8000~24000이었다. 분자 내 가교밀도 및 하드 세그먼트의 양이 증가할수록 인장강도가 증가하고 연신율이 감소하였으며, 폴리우레탄내의 가교밀도가 증가할수록 열 안정성이 향상되었다. 가교밀도는 NCO/OH의 비가 1.1에서 최대값을 나타내었고, 디올의 함량과 분자량이 클수록 증가하였다.
Polyurethanes(PUs) were synthesized by reaction of isophorone diisocyanate, acetylbutyl citrate, and 3 types of polycaprolactone diol. Their structures were confirmed by FT-IR and NMR spectrometer. And, their thermal and mechanical properties were measured by TGA and UTM. The effective network chain lengths ( c M ), measured by compressive modulus apparatus, were about 8000 24000 g/mol. As crosslinking density and amount of hard segment increased, tensile strength increased and elongation decreased. As the crosslinking density of PUs increased, thermal property inproved. When the ratio of NCO/OH is 1.1, maximum crosslinking density was achieved.
Keywords:polyurethane;polycaprolactone;polyester system;effective network chain lengths
  1. Wirpsza Z, Polyurethanes Chemistry, Technology and Applications, Ellis Horwood, New York (1993)
  2. Oertel G, Polyurethane Handbook, Hanser, Cincinnati (1994)
  3. Ko JY, Seo KJ, Kwon SY, Wu JP, Park HS, Polym.(Korea), 22(5), 756 (1998)
  4. Hepburn C, Polyurethane Handbook, Elsevier Science Publishing Co,. New York (1992)
  5. Ahn JB, Cho HK, Jeong CN, Noh ST, J. Korean Ind. Eng. Chem., 8, 230 (1989)
  6. Kang SG, Song BG, Lee JH, Park CJ, Ryu H, J. Korean Ind. Eng. Chem., 14(3), 325 (2003)
  7. Davis DJ, Staley HB, Analytical Chemistry of Polyurethane, Wiley-Intersicence, New York (1969)
  8. Heburn C, Polyurethane Elastomers, Applied Science Publishers, New York (1982)
  9. Park BY, Maeng KS, Lee JW, Yeo JK, Polym.(Korea), 9(1), 59 (1985)
  10. Cluff EF, Gladding EK, Pariser R, J. Polym. Sci., 45, 341 (1960) 
  11. French DM, J. Appl. Polym. Sci., 25, 665 (1980) 
  12. Bills KW, Salcedo FS, J. Appl. Phys., 32, 2364 (1962) 
  13. Pouchert CJ, The Aldrich Library of Infrared Spectra, Aldrich Chemical Co,. Milwaukee (1975)
  14. Fresenius W, Huber JFK, Pungor E, Rechnitz GA, Simon W, West TS, Spectral Data for Structure Determination of Organic Compounds, Spriinger-Verlag, Berlin (1989)
  15. Kwei TK, J. Appl. Polym. Sci., 27, 2891 (1982) 
  16. McLennaghan AW, Petherick RA, Eur. Polym. J., 24, 1063 (1988) 
  17. Xiao H, Xiao HX, Frisch KC, Malwitz N, J. Appl. Polym. Sci., 54(11), 1643 (1994)