Article
  • Synthesis and Properties of Polyester System Polyurethane without Solvent
  • Kwak NS, Yang YK, Jeong BY, Hwang TS
  • 무용제 반응에 의한 폴리에스테르계 폴리우레탄의 합성 및 특성
  • 곽노석, 양윤규, 정부영, 황택성
Abstract
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 800024000 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.

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.

Keywords: polyurethane; polycaprolactone; polyester system; effective network chain lengths

References
  • 1. Wirpsza ZPolyurethanes Chemistry, Technology and Applications, Ellis Horwood, New York (1993)
  •  
  • 2. Oertel GPolyurethane Handbook, Hanser, Cincinnati (1994)
  •  
  • 3. Ko JY, Seo KJ, Kwon SY, Wu JP, Park HS, Polym.(Korea), 22(5), 756 (1998)
  •  
  • 4. Hepburn CPolyurethane 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 HBAnalytical Chemistry of Polyurethane, Wiley-Intersicence, New York (1969)
  •  
  • 8. Heburn CPolyurethane 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 CJThe Aldrich Library of Infrared Spectra, Aldrich Chemical Co,. Milwaukee (1975)
  •  
  • 14. Fresenius W, Huber JFK, Pungor E, Rechnitz GA, Simon W, West TSSpectral 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)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2005; 29(4): 344-349

    Published online Jul 25, 2005

  • Received on Feb 3, 2005
  • Accepted on Jul 7, 2005