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Journal of Polymer Research

, 26:45 | Cite as

Investigation of non-adhesive behaviour of waterborne polyurethane dispersions

  • Nadia AkramEmail author
  • Khalid Mahmood Zia
  • Muhammad Saeed
  • Muhammad Usman
  • Waheed Gul Khan
  • Muhammad Arshad Bashir
ORIGINAL PAPER
  • 27 Downloads

Abstract

The current work probe the thermo-mechanical defects responsible for the non-adhesive behaviour of waterborne polyurethane dispersions (PUDs). A sequence of composition of PUDs has been developed by using blended macrodiols of hydroxyl terminated polybutadiene (HTPB) and polypropylene glycol (PPG). The urethane linkages have been developed by the use of 1,6 hexane diisocyanate (HDI). The polymer contents synthesized by prepolymer method have been dispersed in deionized water to develop ecofriendly dispersions. The dispersions were subjected to probe tack analysis to determine the extent of adhesiveness. The adhesive properties evaluated from probe tack curve show tack adhesion energy from 10.5 to 42. 5 J-m-2. The DMA analysis revealed high storage modulus up to 1.42 MPa for PUD films. The adhesive properties evaluated by the consideration, of the ratio of loss tangent, to the storage modulus (tanδ / E′) for comparison resulted in the values from 0.15 -0.71 MPa-1. The Tg ranges from ̶ 65 °C to ̶ 57 °C. The composition of blended macrodiols of high molecular weight HTPB results in tack less rigid films of PUDs.

Graphical Abstract

Key words

Dispersion Adhesives Blended macrodiols Viscoelasticity Differential Scanning Calorimetry (DSC) 

Notes

Acknowledgements

We highly acknowledge Higher Education Commission of Pakistan for the grant to N.A. to execute this project. The authors also acknowledge the assistance of Prof JL. Keddie, technical assistance from Dr. Robert Gurney and Mrs.Violeta Doukova at the University of Surrey, UK.

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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  1. 1.Institute of ChemistryGovernment College UniversityFaisalabadPakistan
  2. 2.Department of ChemistryQuaid-i-Azam UniversityIslamabadPakistan
  3. 3.Institute of Industrial Control SystemsRawalpindiPakistan

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