Characterization in the Toughening Process
of CTBN Modiﬁed Epoxy Resins Induced by
Electron Beam Radiation
Jong Seok Park,
Phil Hyun Kang,
Young Chang Nho,
and Dong Hack Suh
Department of Chemical Engineering, Hanyang University,
Haengdang-1-Dong, Seongdong-Ku, Seoul, South Korea
Radiation Application Research Division, Korea Atomic Energy
Research Institute, Daejon, South Korea
Epoxy resins are widely utilized as high performance thermosetting resins for many
industrial applications but characterized by a relatively low toughness. Electron beam
(EB) curing of polymer resins has a number of advantages over conventional thermal
curing, such as shorter curing time, low energy consumption, low cure temperature,
dimensional stability, reduced manufacturing cost. In the present work liquid carboxyl-
terminated butadiene acrylonitrile (CTBN) copolymers containing 8% acrylonitrile is
added at different contents to improve the toughness of diglycidyl ether of bisphenol A
(DGEBA) epoxy resins using triarylsulfonium hexaﬂuoroanimonate as a photointiator.
The EB irradiation was conducted 5 kGy to 250 kGy in nitrogen. The physics properties
of CTBN modiﬁed epoxy resins were examined by determine gel content, DMA
(dynamic mechanical analysis), UTM (Instron model 4443), SEM (scanning electron
Epoxy resin; CTBN; Electron beam curing; Flexural properties.
1060-1325 (Print); 1520-5738 (Online)
2003 by Marcel Dekker, Inc.
Correspondence: Professor Young Chang Nho, Radiation Application Research Division, Korea
Atomic Energy Research Institute, Daejon 305-600, South Korea.
JOURNAL OF MACROMOLECULAR SCIENCE
Part A—Pure and Applied Chemistry
Vol. A40, No. 6, pp. 641–653, 2003
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