Rheological and mechanical properties of DGEBA‐S epoxy copolymer initiated by  N ‐benzylquinoxalinium hexafluoroantimonate | Zendy

Park SooJin | Zendy; Kang JunGil | Zendy; Kwon SooHan | Zendy

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

Author(s) -

Park SooJin,

Kang JunGil,

Kwon SooHan

Publication year - 2005

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.1783

Subject(s) - epoxy , materials science , copolymer , cationic polymerization , toughness , rheology , dynamic mechanical analysis , casting , isothermal process , polymer chemistry , composite material , polymer , thermodynamics , physics

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

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