A joint research team from Hiroshima University and Okayama University has successfully determined the chemical structure of poly(β-pinene), a plant-based resin, for the first time in 75 years. This breakthrough not only enhances the performance potential of plant-derived materials but also opens new doors for replacing fossil fuel-based materials. The findings were published on September 25, 2024, in the journal Macromolecules.
Plant-Based Resins Could Revolutionize High-Performance Materials and Fossil Fuel Substitutes
Plant-based polymers have gained attention for their sustainability and environmental benefits. However, improving their performance and finding ways to replace fossil fuel-derived materials have remained significant challenges. A collaborative research group from Hiroshima University and Okayama University has made a significant breakthrough by determining the chemical structure of poly(β-pinene), a plant-based hydrocarbon resin.
Poly(β-pinene) is derived from plant-based β-pinene and is expected to be used in various applications such as adhesives and transparent resins. Despite this, its exact chemical structure remained elusive due to its complex repeating units. The research team utilized a unique catalyst technology developed by Hiroshima University, along with cryo-probe NMR analysis, to reveal the two major repeating structures in poly(β-pinene): the 1,4-cyclohexenyl and 1,3-cyclohexenyl structures.
This discovery has allowed the team to further clarify the relationship between the polymer’s structure and its thermal properties. They found that increasing the proportion of the 1,4-structure leads to higher heat resistance. If these advancements continue, it could pave the way for replacing fossil fuel-based hydrocarbon resins with plant-based alternatives, significantly reducing environmental impact.
Looking ahead, the team expects further advancements in the functionality and applications of poly(β-pinene), potentially leading to its use in coatings, transparent films, and other industrial products. This breakthrough marks an important step toward building a sustainable, circular society.
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