Rheological and mechanical properties of DGEBA-S epoxy copolymer initiated by N-benzylquinoxalinium hexafluoroantimonate

The rheological and mechanical properties of the DGEBA‐S epoxy copolymer initiated by N‐benzylquinoxalinium hexafluoroantimonate (BQH) as a cationic latent thermal catalyst were investigated. The rheological properties of the DGEBA‐S/BQH system were investigated using a rheometer under isothermal co...

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Bibliographic Details
Published in:Polymer international 2005-06, Vol.54 (6), p.886-890
Main Authors: Park, Soo-Jin, Kang, Jun-Gil, Kwon, Soo-Han
Format: Article
Language:English
Subjects:
activation energy
Applied sciences
catalyst
Chemical properties
epoxy resins
Exact sciences and technology
mechanical behavior
Polymer industry, paints, wood
Properties and testing
rheological properties
Technology of polymers
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Summary:The rheological and mechanical properties of the DGEBA‐S epoxy copolymer initiated by N‐benzylquinoxalinium hexafluoroantimonate (BQH) as a cationic latent thermal catalyst were investigated. The rheological properties of the DGEBA‐S/BQH system were investigated using a rheometer under isothermal conditions, and the mechanical properties of the casting specimens, involving flexure and impact tests, were also performed. The crosslinking activation energy and mechanical properties of the DGEBA‐S/BQH system were higher than those of the DGEBA/BQH system. This could be attributed to the introduction of sulfone groups with a polar nature to the main chain of the epoxy resins which led to a decrease of molecular motion and an improvement in the toughness of the cured epoxy copolymers. Copyright © 2005 Society of Chemical Industry
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.1783