Biorenewable ROMP-based thermosetting copolymers from functionalized castor oil derivative with various cross-linking agents

Rui Ding, Ying Xia, Timothy C. Mauldin, Michael R. Kessler

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


A new norbornenyl-functionalized castor oil alcohol (NCA) was synthesized and ring-opening metathesis copolymerized separately with two norbornene-based cross-linking agents: dicyclopentadiene (DCPD) and a bifunctional norbornene crosslinker (CL). Isothermal differential scanning calorimetry (DSC) was used to examine the cure behavior of NCA/DCPD and NCA/CL resins, through which a reasonable cure schedule was determined. The glass transition temperature (Tg) and storage modulus (E′), characterized by dynamic mechanical analysis (DMA), increased significantly in both copolymer systems with the addition of cross-linking agents. Cross-link density of the two systems was evaluated using a modified empirical equation from the kinetic theory of rubber elasticity. Differences in tensile stress-strain behavior and thermal stability between polymerized NCA/DCPD and NCA/CL were correlated to the structural rigidity and cross-linking density resulting from the cross-linking agents.

Original languageEnglish (US)
Pages (from-to)5718-5726
Number of pages9
Issue number22
StatePublished - Oct 23 2014

Bibliographical note

Funding Information:
This material is based upon work supported by the National Science Foundation under Grant No. CMMI1348747 . We are also thankful to Professor Richard Larock from the Department of Chemistry at Iowa State University (ISU) for the use of lab equipment for monomer preparation. Additionally, we thank Dr. David Grewell and Mr. Russell Huffman from the Department of Agricultural and Biosystems Engineering at ISU for their careful assistance in the preparation of tensile testing samples.

Publisher Copyright:
© 2014 Elsevier Ltd.


  • Castor oil
  • Cross-linking
  • Norbornenyl functionality


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