A modified quasi-creep model for assessment of deformation of topas COC substrates in the thermal bonding of microfluidic devices : Experiments and modeling

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

9 Scopus Citations
View graph of relations

Author(s)

  • Zhi Y. Wang
  • Chee Y. Yue
  • Yee C. Lam
  • Sunanda Roy
  • Rajeeb K. Jena

Detail(s)

Original languageEnglish
Pages (from-to)867-873
Journal / PublicationJournal of Applied Polymer Science
Volume122
Issue number2
Publication statusPublished - 15 Oct 2011
Externally publishedYes

Abstract

The effects of thermomechanical properties of dissimilar polymer plates on thermal bonding were investigated and the resultant deformation of cover Topas COC plate was modeled using a simplified quasi-creep model. The appropriate conditions for thermal bonding for minimal deformation of both the Topas cover and substrate plates could be established through simulation using the quasi-creep model. Both the cover plate and the substrate containing microchannels were fabricated by injection molding. The elastic modulus of the COC plate at different temperatures was measured using three-point bending test. The thermal bonding was conducted at different temperatures, pressures, and holding times. The deformation of the cover plate (consisting of Topas with a lower glass transition temperature, Tg) into the microchannel of the substrate plate (consisting of Topas with a higher Tg) was found to be significant even at lower bonding pressures when the bonding temperature was higher than a critical temperature. Such deformation was dependent on the viscoelastic creep behavior of the material and the thermal bonding temperature and load. This deformation behavior was predicted by the numerical model, and the predicted results agree well with the experimental data. The bonding strength of the sealed microchannels was evaluated using the burst test. © 2011 Wiley Periodicals, Inc.

Research Area(s)

  • COC, creep, modeling, thermal bonding, viscoelastic properties

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

A modified quasi-creep model for assessment of deformation of topas COC substrates in the thermal bonding of microfluidic devices: Experiments and modeling. / Wang, Zhi Y.; Yue, Chee Y.; Lam, Yee C. et al.
In: Journal of Applied Polymer Science, Vol. 122, No. 2, 15.10.2011, p. 867-873.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review