Skip to main content
Article
Structure development during uniaxial deformation of pen using real time spectral birefringence technique.
Polymer Engineering Faculty Research
  • Mukerrem Cakmak
Document Type
Article
Publication Date
10-1-2003
Abstract

During uniaxial deformation of amorphous PEN poly (ethylene 2,6 naphthalate) films, necking is developed even at rubbery temperatures above the glass transition temperature. To elucidate the structural changes occurring during neck formation and further strain hardening, a real time spectral birefringence technique together with a true stress / true strain measurement technique is applied. These techniques are able to track the changes in birefringence and stress levels as the film is being deformed. The results obtained by these two techniques permit determination of the stress optical constant and the limits at which it starts deviating from the linear behavior as well as large deformation behavior. Further investigation by X-ray and DSC measurements helps to understand and clarify the structure developed during the deformation process of the material.

Citation Information
Mukerrem Cakmak. "Structure development during uniaxial deformation of pen using real time spectral birefringence technique." (2003) p. 1692 - 1696
Available at: http://works.bepress.com/mukerrem_cakmak/9/