Simultaneous measurement of transient stress and flow birefringence in one-sided compression (biaxial extension) of a polymer melt

1981 ◽  
Vol 20 (5) ◽  
pp. 419-432 ◽  
Author(s):  
J. A. van Aken ◽  
H. Janeschitz-Kriegl
Keyword(s):  
Simultaneous Measurement ◽  
Polymer Melt ◽  
Flow Birefringence ◽  
Transient Stress ◽  
Biaxial Extension

scholarly journals A study on the flow birefringence of polymer melt.

1988 ◽  
Vol 54 (508) ◽  
pp. 2123-2127
Author(s):  
Tokuyuki HONDA ◽  
Hirosi TAMAKI ◽  
Yukio HORI
Keyword(s):  
Polymer Melt ◽  
Flow Birefringence

scholarly journals Investigation of Vortex Development during Polymer Melt Flows by Flow Birefringence

2011 ◽  
Author(s):  
Jan Musil ◽  
Martin Zatloukal ◽  
Tim Gough ◽  
Mike Martyn ◽  
Martin Zatloukal
Keyword(s):  
Polymer Melt ◽  
Flow Birefringence

Polymer Morphology Revealed by Staining Techniques

1981 ◽  
Vol 39 ◽  
pp. 340-341
Author(s):  
A. C. Reimschuessel ◽  
V. Kramer
Keyword(s):  
Polymer Melt ◽  
Nylon 6 ◽  
Morphological Features ◽  
Negative Staining ◽  
Polymer Morphology ◽  
Crystallizable Polymer ◽  
Staining Techniques ◽  
Long Chain

Staining techniques can be used for either the identification of different polymers or for the differentiation of specific morphological domains within a given polymer. To reveal morphological features in nylon 6, we choose a technique based upon diffusion of the staining agent into accessible regions of the polymer.When a crystallizable polymer - such as nylon 6 - is cooled from the melt, lamellae form by chainfolding of the crystallizing long chain macromolecules. The regions between adjacent lamellae represent the less ordered amorphous domains into which stain can diffuse. In this process the lamellae will be “outlined” by the dense stain, giving rise to contrast comparable to that obtained by “negative” staining techniques.If the cooling of the polymer melt proceeds relatively slowly - as in molding operations - the lamellae are usually arranged in a radial manner. This morphology is referred to as spherulitic.

Sign in / Sign up

Export Citation Format

Share Document