Polymer Engineering Faculty Research

Title

Uniaxial stretching of PLA using fully automated on-line birefringence coupled with true stress - true strain measurement - part I: stretching rate effects

Document Type

Article

Publication Date

2003

Abstract

The effect of deformation rate on fundamental deformation-structure relationships in melt cast amorphous Poly(lactic acid) (PLA) films was investigated using a stretch birefringence apparatus that allows for direct measurement of true stress, true strain, and birefringence. Crystalline phase behavior was elucidated with WAXD and DSC. Relationships between stress, strain, and birefringence are strongly affected by stretching rate. The effect of stretching rates on the molecular mechanisms of uniaxial deformation in rubbery state PLA films and its affect on the various levels of structure are elucidated in this study.

Publication Title

ANTEC