PLASTIC FLOW RATES IN NYLON INTERPRETED IN TERMS OF DISLOCATION MOTION,
Abstract
Observations of the propagation of plastic band-fronts in non-oriented Nylon 6-10 monofilaments were made as a function of load and temperature; and analyzed in terms of dislocation dynamics. From the shapes and the velocities of the band-fronts, dislocation velocities are estimated and found to have a stress-dependence similar to that found for non-polymeric crystalline materials. The maximum strain required to initiate flow in Nylon is about 40%, independent of the load and strain-rate, and in agreement with previous experiments of Miklowitz, and of Williams and Bender. Measurements by Williams and Bender for Nylon 66 were also analyzed. From the stress-dependence of creep incubation times reasonable values for the mean dislocation velocity in Nylon 66, and the associated activation energy, were obtained. It is tentatively concluded that the rate of breaking of hydrogen bonds limits dislocation mobility in Nylons 6-10 and 66. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0650578
Entities
People
- B. N. Dey
Organizations
- University of Illinois Urbana–Champaign