Mechanical behavior of a semicrystalline polymer before necking. Part 1: Characterization of uniaxial behavior
Authors:
- 1 January 2001
- journal article
- research article
- Published by Wiley in Polymer Engineering & Science
- Vol. 41 (1) , 66-76
Abstract
The behavior of the semicrystalline polymer polypropylene (PP) was studied in the pre‐necking domain. Mechanical tests were performed to characterize its viselastic and its viscoplastic behavior. The usual approach for studying metals was adopted to investigate the effect of heterogeneities caused by spherulitic morphology. The macroscopic stress was split into an effectie stress and a back stress so that the interactions between crystalline lamellae and amorphous phases could be taken into account. An understanding of the relationship between microstructure and the macroscopic strain mechanisms was developed.Keywords
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