Advertisement

Journal of Polymer Research

, Volume 15, Issue 1, pp 67–73 | Cite as

Effect of the hard segment on the properties of UV curable waterborne blocked polyurethanes

  • Chenyan Bai
  • Xingyuan Zhang
  • Jiabing Dai
Article

Abstract

Two types of UV curable waterborne blocked polyurethanes (PUs) were obtained from 2,4-tolylene diisocyanate(TDI) and isophorone diisocyanate (IPDI), which had the same soft segments and different hard segments. The PUs contained both the UV curable C=C bond and the blocked NCO groups which could be de-blocked when heated. Effect of the hard segment on the properties of the two types of PUs was investigated. The FTIR spectra method was employed to confirm the structure of the PUs. The photo-DSC was used to study the photo-polymerization rate of the PUs under UV irradiation in the presence of a photo-initiator and the C=C conversion behaviors. Heating-up IR analysis was used to track the de-blocking process and the heat curing process. The thermal degradation analysis (TGA) was employed to investigate the thermal stability of the UV cured films before and after heat curing process. Dynamic mechanical properties of the UV and heat cured films were investigated by the dynamic mechanical thermal analysis (DMTA).

Keywords

UV curing Waterborne Blocked polyurethane Hard segment 

Notes

Acknowledgements

Financial support from the National Natural Science Foundation of China (No.20073041) and Anhui Provincial Education Department (No.2003kj051zd) were acknowledged.

References

  1. 1.
    Gamage NJW, Hill DJT, Pomery PJ, Lukey CA (2006) Polym Eng Sci 46:532–539CrossRefGoogle Scholar
  2. 2.
    Amerio E, Sangermano M, Malucelli G, Priola A, Rizza G (2006) Macromol Mater Eng 291:1287–1292CrossRefGoogle Scholar
  3. 3.
    Sangermano M, Malucelli G, Priola A, Manea M (2006) Prog Org Coat 55:225–230CrossRefGoogle Scholar
  4. 4.
    Studer K, Decker C, Beck E, Schwalm R, Gruber N (2005) Prog Org Coat 53:126–133CrossRefGoogle Scholar
  5. 5.
    Studer K, Decker C, Beck E, Schwalm R (2005) Eur Polym J 41:157–167CrossRefGoogle Scholar
  6. 6.
    Decker C, Masson F, Schwalm R (2003) Macromol Mater Eng 288:17–28CrossRefGoogle Scholar
  7. 7.
    Maag K, Lenhard W, Löffles H (2000) Prog Org Coat 40:93–97CrossRefGoogle Scholar
  8. 8.
    Bai CY, Zhang XY, Dai JB, Li WH (2006) Prog Org Coat 55:291–295CrossRefGoogle Scholar
  9. 9.
    Andrzejewska E, Andrzejewski M (1998) J Polym Sci Polym Chem 36:665CrossRefGoogle Scholar
  10. 10.
    Kothandaraman H, Thangavel R (1993) Angew Makromol Chem 207:93–99CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China

Personalised recommendations