Graduate Thesis Or Dissertation

Molded Fiber Bottle Coatings for Environmental Resistance and Sustainability

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  • In recent years, non-renewable and non-biodegradable plastic packaging forms the majority of landfilled waste. These products, mainly made from Polyethylene Tetraphlatate (PET) and other polyolefins, have excellent durability and barrier properties, but take hundreds of years to degrade. Much focus has been put on developing environmentally friendly alternatives to polyolefins to meet the growing need for durable packaging. Paper or fiber-based packaging materials have been touted as a solution to the world’s plastic waste problem, however, they tend to have poor water and oxygen resistance and do not meet the high barrier requirements to be used as packaging. To improve barrier properties, bio-based plastic and rubber liners were developed, so that the fiber-lined paper composites can replace polyolefin-based packaging. This study focuses on the barrier properties of the bioplastic and rubber liners, using the Water Vapour Transmission Rate (WVTR) based on ASTM E96 and Oxygen Transmission Rate (OTR) based on ASTM D2985 as well as crosslink density using the Flory-Rehner equation, to determine the suitability of the liners as replacements for polyolefins. In addition, the biodegradability of these liners was evaluated through a compost test based on ASTM D6400. The results show that the crosslink density, Oxygen Transmission Rate, and Water Vapour Transmission Rate of the material can be a good indicator of the barrier properties. Monitoring the change in crosslink density was also found to be a good way to observe the level of degradation during composting. In addition, the study found that a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) co-polymer film made by KANEKA, Japan, and a high silica content rubber liner known as XR322-6, provided by HP Inc. (Corvallis, OR) and manufactured by Da/Pro Rubber (Tulsa, OK) had comparable barrier properties to polyolefins while maintaining satisfactory levels of biodegradability.
  • Keywords: Polymers, Sustainability, Materials, Chemical Engineering
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  • I would like to thank the HP-OSU Seed Grant for funding this project.
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  • Intellectual Property (patent, etc.)
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  • 2024-03-22 to 2024-04-01



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