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Journal of Materials Science

, Volume 43, Issue 18, pp 6366–6373 | Cite as

Shape-memory effects of polyurethane copolymer cross-linked by dextrin

  • Yong-Chan Chung
  • Jung Hoon Choi
  • Byoung Chul ChunEmail author
Article

Abstract

The effects of the dextrin cross-linking and hard-segment content on the shape-memory property of a polyurethane (PU) block copolymer were investigated. Although dextrin was selected due to its large number of free hydroxyl groups and ubiquitous availability, it is unfortunately insoluble in most organic solvents. The insolubility of dextrin was resolved by attaching a phenyl group onto the dextrin to reduce its hydrophilicity. The phase separations of hard and soft segments were not dependent on the dextrin cross-linking and hard-segment content, as per the results obtained from FTIR, DSC, and XRD analysis. An increased content of chemically cross-linked dextrin increased the maximum stress, but did not decrease the strain for most cases. The cross-linking density increased with increasing dextrin content, as expected. After dextrin cross-linking, the shape recovery rate was generally over 90%, and remained the same after four cyclical tests, while a low shape retention rate was observed for most cases. The best shape-memory effect, considering both the shape recovery and retention rate, was found for a PU consisting of 35 wt.% hard segment and 2 wt.% dextrin. Finally, dextrin was compared to other cross-linking compounds, such as glycerol and pentaerythritol, in this investigation.

Keywords

Dextrin Hard Segment Soft Segment Shape Recovery Phenylisocyanate 

Notes

Acknowledgements

The authors of this article would like to thank the Korea Science and Engineering Foundation. (KOSEF) for sponsoring this research through the SRC/ERC Program of MOST/KOSEF (R11-2005-065) and MOST/KOSEF (No. R01-2007-000-20385-0).

References

  1. 1.
    Kim BK, Lee SY, Xu M (1996) Polymer 37:5781. doi: https://doi.org/10.1016/S0032-3861(96)00442-9 CrossRefGoogle Scholar
  2. 2.
    Takahashi T, Hayashi N, Hayashi S (1996) J Appl Polym Sci 60:1061. doi :10.1002/(SICI)1097-4628(19960516)60:7<1061::AID-APP18>3.0.CO;2-3CrossRefGoogle Scholar
  3. 3.
    Lee BS, Chun BC, Chung YC, Sul KI, Cho JW (2001) Macromolecules 34:6431. doi: https://doi.org/10.1021/ma001842l CrossRefGoogle Scholar
  4. 4.
    Chun BC, Chong MH, Chung YC (2007) J Mater Sci 42:6524. doi: https://doi.org/10.1007/s10853-007-1568-z CrossRefGoogle Scholar
  5. 5.
    Cho TK, Chong MH, Chun BC, Kim HR, Chung YC (2007) Fibers Polym 8:7CrossRefGoogle Scholar
  6. 6.
    Yang JH, Chun BC, Chung YC, Cho JH (2003) Polymer 44:3251. doi: https://doi.org/10.1016/S0032-3861(03)00260-X CrossRefGoogle Scholar
  7. 7.
    Lin JR, Chen LW (1998) J Appl Polym Sci 69:1575. doi :10.1002/(SICI)1097-4628(19980822)69:8<1575::AID-APP12>3.0.CO;2-UCrossRefGoogle Scholar
  8. 8.
    Chun BC, Cha SH, Park C, Chung YC, Park MJ, Cho JW (2003) J Appl Polym Sci 90:3141. doi: https://doi.org/10.1002/app.13060 CrossRefGoogle Scholar
  9. 9.
    Shim YS, Chun BC, Chung YC (2006) Fibers Polym 7:328CrossRefGoogle Scholar
  10. 10.
    Chun BC, Cho TK, Chong MH, Chung YC (2007) J Mater Sci 42:9045. doi: https://doi.org/10.1007/s10853-007-1824-2 CrossRefGoogle Scholar
  11. 11.
    Blackwell J, Lee CD (1983) J Polym Sci Polym Phys Ed 21:2169. doi: https://doi.org/10.1002/pol.1983.180211024 CrossRefGoogle Scholar
  12. 12.
    Tobushi H, Hara H, Yamada E, Hayashi S (1996) Smart Mater Struct 5:483. doi: https://doi.org/10.1088/0964-1726/5/4/012 CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Yong-Chan Chung
    • 1
  • Jung Hoon Choi
    • 2
  • Byoung Chul Chun
    • 2
    Email author
  1. 1.Department of ChemistryThe University of SuwonHwasungshiSouth Korea
  2. 2.Department of Polymer EngineeringThe University of SuwonHwasungshiSouth Korea

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