Article
  • Aqueous Polyurethanes from Cycloaliphatic Diisocyanate and Polytetramethylene Glycol; 2.Effect of Extender Content on Dispersion and Film Properties
  • Lee YM, Kim BK, Shin YJ, Cho HH
  • 환상 지방족 Isocyanate 및 Polytetramethylene Glycol로 제조한 수성 Polyurethane; 2.쇄연장제 함량이 분산 및 Film 물성에 미치는 영향
  • 이영민, 김병규, 신영조, 조현혹
Abstract
Segmented polyurethane(PU) ionomers were prepared from cycloaliphatic diisocyanate (methylene bis(4-cyclohexyl isocyanate) (H12MDI), isophoron diisocyanate(IPDI)) and polytetramethylene glycol(PTMG) using 1,4-butanediol(BD, chain extender) and anionic type chain extender, viz. dimethylol propionic acid(DMPA). The effect of BD on the state of dispersion and physical properties of emulsion last film was determined using Autosizer, transmission electron microscopy(TEM), Instron, and Rheovibron. With more incorporation of BD in PU, particle size of emulsion, tensile modulus and strength of the emulsion cast film increased, and the major transition of soft segment moved toward higher temperature. With regard to the structural effect of the isocyanate, H12MDI gave finer dispersion, and better mechanical properties over IPDI.

환상 지방족 isocyanate인 methylene bis(4-cyclohexyl isocyanate)(H12MDI) 및 isophoron diisocyanate(IPDI)와, polytetramethylene glycol(PTMG), 1,4-butanediol(BD, 쇄연장제) 및 dimethylol propionic acid(DMPA)로부터 polyurethane(PU) ionomer를 제조, 이를 물에 분산시킨으로써 안정된 수성 PU를 제조하였으며, 쇄연장제의 함량이 분산 입경 및 emulsion cast film의 물리적 성질에 미치는 영향을 검토하였다. BD의 함량이 증가할수록 유화입경, 인장 물성(탄성률 및 강도)은 증가 하였고, α-완화는 고온으로 이동되었으며 무정영역의 상호인력 역시 증가함을 알수 있었다. 전반적으로 H12MDI계 PU가 IPDI계 PU네 비해 유화입경이 작고, 기계물성이 우수하게 나타났다.

References
  • 1. U.S. Patent, 2,968,575, Du Pont (1954)
  •  
  • 2. U.S. Patent, 3,437,624, Wyandotte (1964)
  •  
  • 3. U.S. Patent, 4,408,008 (1983)
  •  
  • 4. U.S. Patent, 4,237,246 (1980)
  •  
  • 5. U.S. Patent, 4,238,378 (1980)
  •  
  • 6. Bayer AGGer. Offen, 1,495,745 (1963)
  •  
  • 7. Hsu SL, Xiao HX, Szmant HH, Frisch KC, J. Appl. Polym. Sci., 29, 2467 (1984)
  •  
  • 8. Dieterich D, Keberle W, Witt H, Angew. Chem.-Int. Edit., 9, 40 (1970)
  •  
  • 9. Al-Salah HA, Frisch KC, Xiao HX, McLean JA, J. Polym. Sci. A: Polym. Chem., 25, 2127 (1987)
  •  
  • 10. Matsuda K, Ohmura H, Tanaka Y, Sakai T, J. Appl. Polym. Sci., 23, 141 (1979)
  •  
  • 11. Chan WC, Chen SA, Polymer, 29, 1995 (1988)
  •  
  • 12. David DJ, Staley HBAnalytical Chemistry of Polyurethanes, High Polymer Series, XVI, Part III, Wiley-Interscience, New York (1969)
  •  
  • 13. Hepburn CPolyurethane Elastomers, Appl. Sci. Publishers, London (1982)
  •  
  • 14. Oertel GPolyurethane Handbook, Hanser Publishers (1985)
  •  
  • 15. vanBogart JWC, Bluemke DA, Cooper SL, Polymer, 22, 1428 (1981)
  •  
  • 16. Cunliffe AV, Davis A, Farey M, Wright J, Polymer, 26, 301 (1985)
  •  
  • 17. Vankrevelen DW, Hoftyzer PJProperties of Polymers, Elsevier, New York, Part II (1976)
  •  
  • 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

  • 1992; 16(5): 547-552

    Published online Sep 25, 1992