Biogene Kunststoff-Additive

Pfaendner, Rudolf; Melz, Tobias

doi:10.1007/978-3-662-58243-5_9

Cited by 1 publication

(1 citation statement)

References 51 publications

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“…However, the use of naturally extracted phenols is associated with some drawbacks. They tend to produce discoloration [21,22,25,27,28] and have often only limited temperature stability, which causes their degradation during polymer processing [28,29]. Furthermore, many natural phenols exhibit only low solubility in apolar polymers, such as PP and polyethylene (PE) [27,28,30,31].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Activity of Biogenic Cinnamic Acid Derivatives in Polypropylene

Mayer,

Steinbrecher,

Metzsch-Zilligen

et al. 2023

Polymers

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Antioxidants (AOs) from natural resources are an attractive research area, as petroleum-based products can be replaced in polymer stabilization. Therefore, novel esters based on the p-hydroxycinnamic acids p-coumaric acid, ferulic acid and sinapic acid were synthesized and their structure properties relationships were investigated. The structures of the novel bio-based antioxidants were verified using NMR and Fourier-transform infrared (FTIR) spectrometry. The high thermal stability above 280 °C and, therefore, their suitability as potential plastic stabilizers were shown using thermal gravimetric analysis (TGA). The radical scavenging activity of the synthesized esters was evaluated by using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. Stabilization performance was evaluated in polypropylene (PP) using extended extrusion experiments, oxidation induction time (OIT) measurements and accelerated heat aging. In particular, the sinapic acid derivative provides a processing stability of PP being superior to the commercial state-of-the-art stabilizer octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

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