Relevance of high temperature oxidative stability testing to long term polymer durability

Citation
L. Woo et al., Relevance of high temperature oxidative stability testing to long term polymer durability, J THERM ANA, 64(2), 2001, pp. 539-548
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
1388-6150 → ACNP
Volume
64
Issue
2
Year of publication
2001
Pages
539 - 548
Database
ISI
SICI code
1388-6150(2001)64:2<539:ROHTOS>2.0.ZU;2-W
Abstract
In polymer degradation and durability studies, as well as predicting shelf- life for medical devices, one is confronted with the need for accurate pred iction and difficulties of long term real-time evaluation. Various ways to accelerate the degradation process have met with mixed success. However, re cently, in our own studies, a 'master curve' like behavior was found to be valid for polypropylene samples studied. Evidently, for samples obeying the master curve, very few data points at high temperatures can be scaled to o btain reasonably accurate estimates on long term durability. Nevertheless, in a reference medium density polyethylene (MDPE) film materi al, the high temperature oxidative induction time data appear to diverge wh en run under air atmosphere compared with oxygen environments. In this arti cle, we will present data on many of the polymer systems studied with an em phasis on extrapolation schemes for high temperature accelerated data to lo wer temperature very long-term durability. In this context, polymer and ant ioxidant reactivity toward oxygen, morphology, and mechanical property depe ndence on extent of degradation all need to be considered. And the potentia l and limitations of this approach will be discussed.