Premium
Rheological analysis of polyvinyl butyral near the glass transition temperature
Author(s) -
Juang YiJe,
Lee L. James,
Koelling Kurt W.
Publication year - 2001
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10727
Subject(s) - materials science , composite material , glass transition , polyvinyl butyral , rheology , viscoelasticity , thermosetting polymer , polymer , lamination , strain hardening exponent , layer (electronics)
In many polymer manufacturing operations, the material is processed near the glass transition temperature (T g ). 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 T g , polyvinyl butyral (PVB), a rubbery polymer used in safety glass lamination, was studied in this work. The flow properties of the polymer above the T g were characterized by using both shear and elongational rheometers, and a tensile tester. The measured flow properties were described by a viscoelastic constitutive model.