Method for degrading polyethylene sheet samples in an oxidative environment

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

9 Scopus citations

Abstract

Stress cracking is a failure mode that must be considered when evaluating the lifetime of polymer components. In modeling this failure mode, mechanical properties as a function of the extent of degradation must be evaluated. This paper describes an apparatus and method for degrading thin polymer sheets in an oxidative environment. A model system of PE in hot chlorinated water with an oxidation reduction potential of approximately 825 mV is considered. The oxidative environment is achieved by a water bath with temperature, pH and free chlorine controlled to 60-65°C, 5.2 +/- 0.5 ppm free chlorine, and 6.3 +0.5/-0.0 pH. Under these conditions, the molecular weight of 50-60 micron thick PE sheets was reduced by 60% and the strain at break for the sheets was reduced by 90% after 1000 hours exposure.

Original languageEnglish (US)
Title of host publication75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017
PublisherSociety of Plastics Engineers
Pages1228-1233
Number of pages6
ISBN (Print)978-0-692-88309-9
StatePublished - Jan 1 2017
Event75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017 - Anaheim, United States
Duration: May 8 2017May 10 2017

Publication series

NameAnnual Technical Conference - ANTEC, Conference Proceedings
Volume2017-May

Other

Other75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017
CountryUnited States
CityAnaheim
Period5/8/175/10/17

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  • Cite this

    Cosgriff, E. P., Mantell, S., & Bhattacharya, M. (2017). Method for degrading polyethylene sheet samples in an oxidative environment. In 75th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Anaheim 2017 (pp. 1228-1233). (Annual Technical Conference - ANTEC, Conference Proceedings; Vol. 2017-May). Society of Plastics Engineers.