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Bio-based antioxidant; Kraft lignin; Hydrolysis lignin; De-polymerization; Polyethylene; Polypropylene.
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Effects Of Lignin As A Stabilizer Or Antioxidant In Polyolefins, Afsana S. Kabir
Effects Of Lignin As A Stabilizer Or Antioxidant In Polyolefins, Afsana S. Kabir
Electronic Thesis and Dissertation Repository
Lignin, a major component of biomass, is an attractive alternative to hindered phenol-based antioxidants for polymers due to its renewable nature and naturally occurring hindered phenolic structure. In this study, for the first time, lignin de-polymerization was explored as a promising approach to improve the reactivity of the lignin-based antioxidants for polymers (polyethylene, PE and polypropylene, PP). A proprietary hydrolytic de-polymerization process was utilized to increase the antioxidant activity of two types of technical lignin: kraft lignin, KL (a by-product from the pulp and paper industry) and hydrolysis lignin, HL (a by-product from the pre-treatment processes in cellulosic ethanol plants). …