Aging and Shear Rejuvenation Behavior of Printing Ink

Abstract:

The aging and shear rejuvenation behavior of a commercial printing ink have been studied experimentally using creep and oscillation modes. We observed that the printing ink has typical rheological characteristics: time-dependent, reversible and shear-thinning viscosity. Meanwhile, these properties are very strongly influenced by shear history, thus employing pre-shearing to obtain a standard test state is of vital importance. After pre-shearing, the quiescent ink undergoes structural evolution, i.e., aging, including a sol-gel (liquid-solid) transition on the early stage at room temperatures, the higher the temperature, the earlier the sol-gel transition occurs. The degree of aging and shear rejuvenation can be characterized by the waiting time after pre-shearing and the stress dependence of the power-law index. Finally, we use a time-stress superposition to obtain a universal master curve which is able to describe the aging behaviors of the printing ink. This study shows that the aging processes of printing ink for different waiting times are self similar, variation of waiting time just change the time scale and elastic modulus.

• Periodical: Advanced Materials Research (Volumes 641-642)
• Pages: 132-135
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.641-642.132
• Online since: January 2013
• Authors: Xiao Lin Ma, Yu Run Fan
• Keywords: Aging, Master Curve, Power Law, Rejuvenation, Rheology, Sol-Gel Transition, Yield Stress

References

[1] Y. Aoki, Rheological characterization of carbon black/varnish suspensions, Colloids and Surfaces A: Physicochem. Eng. Aspects, 308, 79-86 (2007).

DOI: 10.1016/j.colsurfa.2007.05.033

[2] H. Kimura, Y. Nakayama, A. Tsuchida, T. Okubo, Rheological properties of deionized Chinese ink, Colloids and Surfaces B: Biointerfaces. 56, 236-240 (2007).

DOI: 10.1016/j.colsurfb.2006.12.004

[3] H.W. Lin, C.P. Chang, W.H. Hwu, M.D. Ger, The rheological behaviors of screen-printing pastes, Journal of materials processing technology, 197, 284-291(2008).

DOI: 10.1016/j.jmatprotec.2007.06.067

[4] M. Cloitre, R. Borrega, L. Leibler, Rheological Aging and Rejuvenation in Microgel Pastes, Phy. Rev. Lett., Vol. 85, Number 22 (2000).

DOI: 10.1103/physrevlett.85.4819

[5] Y.M. Joshi, G.R.K. Reddy, Aging in a colloidal glass in creep flow: Time-stress superposition, Phy. Rev. E., 77, 021501 (2008).

DOI: 10.1103/physreve.77.021501

[6] S.M. Fielding, M.E. Cates, P. Sollich, Aging and rheology in soft materials,J. Rheol., 44, 323 (2000).

DOI: 10.1122/1.551088

[7] L.C.E. Struik, Physical Aging in Amorphous Polymers and Other Materials, Elsevier, Houston (1978).

[8] H.H. Winter, F. Chambon, Analysis of linear viscoelasticity of a croslinking polymer at the gel point,J. Rheol., 30(2), 367-382 (1986).