Rheological analysis of polyvinyl butyral near the glass transition temperature

Yi-Je Juang, L. James Lee, Kurt W. Koelling

Research output: Contribution to journalArticle

21 Citations (Scopus)


In many polymer manufacturing operations, the material is processed near the glass transition temperature (Tg). Examples are thermoforming, blow molding, film blowing, hot embossing, forging, plastic welding, and de-airing in safety glass lamination. In these processes, solid-like behaviors such as strain hardening and yielding play important roles. These material properties cause the material to flow (or deform) in a way that substantially differs from a polymer melt. In order to understand the flow behavior near the Tg, polyvinyl butyral (PVB), a rubbery polymer used in safety glass lamination, was studied in this work. The flow properties of the polymer above the Tg were characterized by using both shear and elongational rheometers, and a tensile tester. The measured flow properties were described by a viscoelastic constitutive model.

Original languageEnglish
Pages (from-to)275-292
Number of pages18
JournalPolymer Engineering and Science
Issue number2 SPEC. ISS
Publication statusPublished - 2001 Feb 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

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