Poly (Ricinoleic Acid) Based Novel Thermosetting Elastomer

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  • Ebata Hiroki
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Yasuda Mayumi
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Toshima Kazunobu
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University
  • Matsumura Shuichi
    Department of Applied Chemistry, Faculty of Science and Technology, Keio University

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A novel bio-based thermosetting elastomer was prepared by the lipase-catalyzed polymerization of methyl ricinoleate with subsequent vulcanization. Some mechanical properties of the cured carbon black-filled polyricinoleate compounds were evaluated as a thermosetting elastomer. It was found that the carbon black-filled polyricinoleate compounds were readily cured by sulfur curatives to produce a thermosetting elastomer that formed a rubber-like sheet with a smooth and non-sticky surface. The curing behaviors and mechanical properties were dependent on both the molecular weight of the polyricinoleate and the amount of the sulfur curatives. Cured compounds consisting of polyricinoleate with a molecular weight of 100,800 showed good mechanical properties, such as a hardness of 48 A based on the durometer A measurements, a tensile strength at break of 6.91 MPa and an elongation at break of 350%.<br>

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