Observation of Poly{Vinyl Butyral}‐Dibutyl Phthalate Binder Capillary Migration

Michael J. Cima, Mark Dudziak, Jennifer A. Lewis

Research output: Contribution to journalArticlepeer-review


The movement of poly (vinyl butyral) (PVB) and dibutyl phthalate (DBP) plastic solution under the influence of capillary forces was observed directly by hot-stage optical microscopy (T=160°C). Migration of a PVB-DBP droplet within a tapered capillary was examined, allowing the surface tension of the binder system at elevated temperatures to be measured, while maintaining constant composition. Calculated surface tension values for PVB-DBP plastic at T=160°C ranged from 8×10 -3 to 20×10 -3 N/m (8 to 20 dyn/cm); the large error was attributable primarily to the difficulty in measuring the radii of curvature of the leading and trailing edges of the droplet.

Original languageEnglish (US)
Pages (from-to)1087-1090
Number of pages4
JournalJournal of the American Ceramic Society
Issue number6
StatePublished - Jun 1989
Externally publishedYes


  • Binders
  • Green body
  • Modeling
  • Plastic solution
  • Processing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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