Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 115, Issue 43, Pages 12392-12400Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp207084j
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Funding
- Composite and Polymer Ageing (COPOLA)
- EDF
- LABORELEC
- NEXANS France
- ANDRA
- CNRS
- INRA
- CEA
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The possible influence of micrometric-size filler particles on the thermo-oxidative degradation behavior of the polymer chains at polymer/filler interfaces is still an open question. In this study, a cross-linked ethylene-propylene-diene (EPDM) terpolymer filled by aluminum trihydrate (ATH) particles is investigated using H-1 solid-state NMR. The time evolution of the EPDM network microstructure under thermal aging at 80 degrees C is monitored as a function of the exposure time and compared to that of an unfilled EPDM network displaying a similar initial structure. While nearly no variations of the topology are observed on the neat EPDM network over 5 days at 80 degrees C, a significant amount of chain scission phenomena are evidenced in EPDM/ATH. A specific surface effect induced by ATH on the thermodegradative properties of the polymer chains located in their vicinity is thus pointed out. Close to the filler particles, a higher amount of chain scissions are detected, and the characteristic length scale related to these interfacial regions displaying a significant thermo-oxidation process is determined as a function of the aging time.
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