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

Abstract

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
JournalPolymer
Volume55
Issue number22
DOIs
StatePublished - Oct 23 2014

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Ltd.

Keywords

  • Castor oil
  • Cross-linking
  • Norbornenyl functionality

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