Analysis of cryogenically treated sheet nylon 6/6

Derek Shaffer, Cody Reinstadtler, John Timothy Roth, Ihab Ragai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

When manufacturing polymer and rubber products, the parts are frequently exposed to cryogenic temperatures after molding or forming in order to improve the ability to remove excess material and flash. However, there has been very little investigation into the effect that cryogenic temperatures may have on polymers. As such, the goal of the research described herein is to examine the effect of this type of treatment on the properties of one such polymer, Nylon 6/6. More specifically, the temperature of the environment surrounding Nylon 6/6 is decreased at two different rates into the cryogenic temperature range, allowed to soak, and then returned to ambient. Whereupon the material properties of the treated Nylon are compared to baseline. This testing demonstrates that the exposure to the cold environment resulted in a decrease in the yield and ultimate tensile strength of the Nylon while leaving the area reduction and strain after necking roughly unchanged. Examination of the surface condition of the treated specimens did not bring to light corresponding cracking from the treatments, thereby indicated that the resultant change in mechanical behavior is likely caused by structural changes within the Nylon. Additional testing of the Nylon, with respect to frequency response, further demonstrated that exposure to cryogenic temperatures resulted in decreases in the Nylon's natural response at the structure's dominate mode. These initial findings indicate that the conventional technique of lowering a part's temperature to enhance the ability to remove flash does, in fact, result in measurable changes in the mechanical behavior of the Nylon product.

Original languageEnglish (US)
Title of host publicationAdditive Manufacturing; Materials
PublisherAmerican Society of Mechanical Engineers
Volume2
ISBN (Electronic)9780791850732
DOIs
Publication statusPublished - Jan 1 2017
EventASME 2017 12th International Manufacturing Science and Engineering Conference, MSEC 2017 collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing - Los Angeles, United States
Duration: Jun 4 2017Jun 8 2017

Other

OtherASME 2017 12th International Manufacturing Science and Engineering Conference, MSEC 2017 collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing
CountryUnited States
CityLos Angeles
Period6/4/176/8/17

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering

Cite this

Shaffer, D., Reinstadtler, C., Roth, J. T., & Ragai, I. (2017). Analysis of cryogenically treated sheet nylon 6/6. In Additive Manufacturing; Materials (Vol. 2). American Society of Mechanical Engineers. https://doi.org/10.1115/MSEC2017-3039