Toughening vinyl ester resin using novel bio-based rubber

Xing Geng, Alexander Grous, John J. Lascala, James M. Sands, Giuseppe R. Palmese

Research output: Contribution to journalConference articlepeer-review


Vinyl Ester (VE) resins are widely used to make polymer matrix composites because of their high modulus, high strength, high glass transition temperature, low weight, and low cost. However, one significant disadvantage of VE resins is low fracture toughness that limits their applications. Traditional methods using butadiene-acrylonitrile copolymer based liquid rubber as a toughener did not achieve satisfactory toughening effect due to its poor miscibility with VE resins as well as its high viscosity. In our study, a novel bio-based rubber (BR) was designed and its toughening effect on VE resins was evaluated. By using VE as a base system, it was demonstrated that significant improvement in fracture toughness (G1c=2000 J/m2 compared to 250 J/m 2) is achieved with minimal reduction of Tg. Moreover, the low viscosity associated with the BR toughener provides ease of processing compared to common liquid and particulate rubber modifiers.

Original languageEnglish (US)
JournalInternational SAMPE Symposium and Exhibition (Proceedings)
StatePublished - 2008
Externally publishedYes
EventSAMPE 2008 - 52nd International SAMPE Symposium - Material and Process Innovations: Changing our World - Long Beach, CA, United States
Duration: May 18 2008May 22 2008

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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