ArticleACS omega2026
Concentration-Dependent Thermo-Oxidative Degradation Behavior and Filler Loading Effects in Talc- and Whisker-Reinforced PP/EOR Composites.
Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors.
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Abstract
This study examines the concentration-dependent thermo-oxidative behavior of polypropylene/ethylene-octene rubber (PP/EOR, 80/20) composites reinforced with talc, whisker, and hybrid talc/whisker fillers (5-15 phr) for automotive interior applications. Accelerated thermal aging was conducted at 140 °C for 300 h to evaluate mechanical retention, oxidation behavior, crystallinity evolution, and residual thermal stability. Low talc loadings (≤10 phr) provided the most favorable aging response: T5 and T10 exhibited impact retention values of 165.46% and 139.37%, respectively, together with crystallinity retention values of 142.86% and 124.49%. These improvements were associated with crystallinity enhancement, limited carbonyl formation, and the barrier-related effect of platelet-like talc fillers. In contrast, high-whisker-loading and hybrid systems showed severe deterioration after aging, with W15 and TW7.5 retaining only 33.56% and 25.50% of their initial impact strength, respectively. These samples also showed pronounced early stage thermal instability, as indicated by reductions in the 5% weight-loss temperature (
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