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Engineered Interface Chemistry to Improve the Strength of Carbon Fiber Composites Cured by Electron Beam

Journal Article · · Industrial and Engineering Chemistry Research
DOI:https://doi.org/10.1021/ie501678j· OSTI ID:1154833
 [1];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)

A reactive sizing was designed to achieve high levels of interfacial adhesion and mechanical properties with a carbon fiber-acrylate system cured by electron beam (EB). The sizing was made of a partially cured epoxy sizing with a high density of pendant functional groups (acrylate functionality) able to generate a covalent bonding with the matrix. The interlaminar shear strength was clearly improved from 61 MPa to 81 MPa (+ 33 %) without any post-processing, reaching a similar value to the one obtained with the same system cured by a thermal treatment. Observation of the fracture profiles clearly highlighted a change in the fracture mechanism from a purely adhesive failure to a cohesive failure. Such improvements of the mechanical properties of carbon fiber composites cured by EB, without any post-cure, have not been reported previously to the best of our knowledge. This constitutes a breakthrough for the industrial development of composites EB curing.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1154833
Journal Information:
Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 32 Vol. 53; ISSN 0888-5885
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (19)

Evolution of properties of an isocyanate/epoxy thermosetting system during cure: Continuous heating (CHT) and isothermal time?temperature?transformation (TTT) cure diagrams journal April 1997
Synthesis and viscoelastic properties of new thermosetting resins having isocyanurate and oxazolidone rings in their molecular structures journal May 1983
Isocyanate–epoxy reactions in bulk and solution journal July 1989
Interlaminar fracture toughness behavior of electron-beam cured carbon-fiber reinforced epoxy-resin composites journal December 2013
Synthesis of poly-2-oxazolidones from diisocyanates and diepoxides journal March 1970
Influence of an oxidation of the carbon fiber surface by boiling nitric acid on the adhesion strength in carbon fiber-acrylate composites cured by electron beam: Characterization of interfaces in composites cured by electron beam journal August 2012
Reaction of a diepoxide with a diisocyanate in bulk: I. Use of a tertiary amine catalyst journal July 1990
Measurement and analytical validation of interfacial bond strength of PAN-fiber-reinforced carbon matrix composites journal March 2008
Studies of interactions in oligomeric epoxy resin-isocyanate systems journal January 1986
Stability of carbon fiber surface functionality at elevated temperatures and its influence on interfacial adhesion journal March 2013
Using the thiol-ene reaction to improve adhesion strength in carbon fiber-acrylate composites cured by ultra violet light journal December 2013
Influence of the carbon fiber surface properties on interfacial adhesion in carbon fiber–acrylate composites cured by electron beam journal July 2011
Properties of thermo-chemically surface treated carbon fibers and of their epoxy and vinyl ester composites journal July 2012
Influence of thermal history on the mechanical properties of carbon fiber–acrylate composites cured by electron beam and thermal processes journal February 2013
Influence of an oxidation of the carbon fiber surface on the adhesion strength in carbon fiber-acrylate composites cured by electron beam journal April 2012
Radiation curing of carbon fibre composites journal January 2014
Use of Plasma Polymerization to Improve Adhesion Strength in Carbon Fiber Composites Cured by Electron Beam journal January 2014
Modification of the Carbon Fiber Surface by Oxygen Plasma and its Influence on Adhesion Strength in Acrylate-Based Composites Cured by Electron Beam and Ultra Violet Light journal June 2013
Grafting acrylate functionalities at the surface of carbon fibers to improve adhesion strength in carbon fiber–acrylate composites cured by electron beam journal November 2013

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