Journal article
Depletion mechanism of antioxidants in MDPE-clay nanocomposites under thermal aging
Polymer degradation and stability, v 97(2)
2012
Abstract
The depletion behavior of two types of hindered phenolic antioxidants (AO), Irganox
® 1010 (I-1010) and Irganox
®1076 (I-1076), in medium density polyethylene (MDPE)/nanoclay composite was evaluated by incubating samples in a forced air oven at 85 °C. The presence of 4 wt% nanoclay accelerated the depletion of both types of AO, particularly at the surface region of the sample. However, the depletion mechanism in the interior of sample was governed by the AO molecular structure. For samples containing the bulky Irganox®1010, OIT decreased exponentially with aging time consistent with a first order reaction. In contrast, an increase of OIT was detected in first 60 days of heat aging for sample containing I-1076 and afterward the OIT decreased slowly with aging time. The hypothesis for the initial increase of OIT is that the relatively small and linear structure of I-1076 may enable it to be trapped inside the nanoclay galleries and then subsequently released into the polymer matrix during heat aging.
Metrics
Details
- Title
- Depletion mechanism of antioxidants in MDPE-clay nanocomposites under thermal aging
- Creators
- Wai-Kuen Wong - Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA 19104, USAShan Cheng - Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAChristopher Y Li - Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAIftekhar Ahmad - Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USARichard Cairncross - Department of Chemical and Biological Engineering, Drexel University, Philadelphia, PA 19104, USAY. Grace Hsuan - Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Polymer degradation and stability, v 97(2)
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering; Materials Science and Engineering; Chemical and Biological Engineering
- Web of Science ID
- WOS:000301212500011
- Scopus ID
- 2-s2.0-84855526555
- Other Identifier
- 991014877872604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Polymer Science