Process efficiency and long‐term performance of α‐tocopherol in film‐blown linear low‐density polyethylene

Abstract

␣-Tocopherol was compared with a commercial phenolic antioxidant (Irganox 1076) as a long-term and process antioxidant in film-blown and compression-molded linear low-density polyethylene. The antioxidant function of ␣-tocopherol was high in the film-blown material, especially in the processing, according to oxygen induction time measurements with differential scanning calorimetry. The residual content of ␣-tocopherol after processing, determined with chromatographic techniques, was less than that of the commercial phenolic antioxidant in both the film-blown and compression-molded materials. The process stabilizing efficiency was nevertheless higher for the material containing ␣-tocopherol. During the long-term stabilization, the efficiency of ␣-tocopherol was less than that of the commercial phenolic stabilizer Irganox 1076 in the thin films, according to chemiluminescence and infrared measurements. The long-term efficiency in the compression-molded samples stabilized with ␣-tocopherol or Irganox 1076 was equally good because of the low loss of both ␣-tocopherol and Irganox 1076 from the thicker films.

Study of the effect of natural antioxidants in polyethylene: Performance of β-carotene

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α-Tocopherol release from active polymer films loaded with functionalized SBA-15 mesoporous silica

“…In the field of food packaging applications, its use is particularly interesting because a-tocopherol can be used as an alternative antioxidant for polymer protection during processing [8] and also as an additive for active packaging systems.…”

Chitosan conjugated with deoxycholic acid and gallic acid: A novel biopolymer‐based additive antioxidant for polyethylene

“…12,13 Its long-term performance in the polymer product, as compared to those of synthetic antioxidants (e.g., Irganox 1076), are points to be overcome. 14,15 Polymer-based stabilizers bring higher thermal stability, more resistance to extraction, and lower toxicity as compared to the small molecules. For example, Ranogajec and Mišak 16 prepared UV-protector (2-hydroxy-4-(3-methacryloxy-2-hydroxy-propoxy) benzophenone)-grafted polyethylene to increase the persistence of the stabilizer in the polymer matrix.…”