Shear and elongational rheology of photo-oxidative degraded HDPE and LLDPE

Manfred Hermann Wagner*, Wang Zheng, Peng Wang, Sebastián Ramos Talamante, Esmaeil Narimissa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The effect of photo-oxidative degradation of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE) was investigated by linear and non-linear rheological measurements. The linear-viscoelastic rheological measurements were performed at different temperatures, while the elongational viscosity was measured at 170°C and at different strain rates. The rheological data are indicative of structural changes caused by photo-oxidative degradation including formation of long-chain branches (LCB), cross-linking, and chain scission, and they revealed a cyclic and continuing competition between chain scission and LCB/gel formation. These findings are supported by additional FTIR measurements and direct measurements of the gel content of the degraded samples.

Original languageEnglish
Title of host publicationNovel Trends in Rheology VII
EditorsMartin Zatloukal
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735415133
DOIs
StatePublished - 5 May 2017
Externally publishedYes
Event7th International Conference on Novel Trends in Rheology 2017 - Zlin, Czech Republic
Duration: 26 Jul 201727 Jul 2017

Publication series

NameAIP Conference Proceedings
Volume1843
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference7th International Conference on Novel Trends in Rheology 2017
Country/TerritoryCzech Republic
CityZlin
Period26/07/1727/07/17

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