Improvement of cryogenic fracture toughness of epoxy by hybridization

Book · Mon Dec 30 23:00:00 EST 1996

OSTI ID:427702

Nishijima, S; Okada, T; Niihara, K ^[1]; Hussain, M ^[2]; Nakahira, A ^[3]

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1. Osaka Univ., Ibaraki, Osaka (Japan)
2. Bangladesh Insulator and Sanitaryware Factory Ltd., Dhaka (Bangladesh)
3. Kyoto Inst. of Tech. (Japan). Dept. of Inorganic Materials

Improvement of the fracture toughness of epoxy at cryogenic temperatures has been carried out aiming at cryogenic application. The macroscopic molecular state of hybrid material was studied and the possible mechanism to improve the fracture toughness even at cryogenic temperature was discussed. Based on the mechanism the hybrid materials were prepared by dispersion of silica through hydrolysis of alkoxide. To connect the silica to epoxy molecule a coupling agent was used. The connection was successfully performed and was confirmed by positron annihilation method. The fracture toughness of the developed hybrid material was found to be approximately 2.6 times higher than that of epoxy itself at liquid helium temperature.

• OSTI ID: 427702
• Report Number(s): CONF-960401--; ISBN 1-55899-338-X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMINES
CURING
DEHYDROCYCLIZATION
EPOXIDES
EXPERIMENTAL DATA
FRACTURE PROPERTIES
HYDROLYSIS
NOTCHES
PRESSURE DEPENDENCE
SILANES
SILICATES
SYNTHESIS
TEMPERATURE DEPENDENCE
VOIDS