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Mechanical and physical properties of isothermally aged carbon fiber‐epoxy composites
Author(s) -
Chifu A. F.,
Iroh J. O.
Publication year - 1996
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.10643
Subject(s) - materials science , composite material , epoxy , isothermal process , flexural strength , diglycidyl ether , nitrogen , glass fiber , fiber , bisphenol a , chemistry , physics , organic chemistry , thermodynamics
Isothermal aging of continuous carbon fiber‐epoxy resin composites containing epoxy resin derived from diglycidyl ether of bisphenol‐A (DGEBA) and methylene dianiline (MDA) and 64 vol% of carbon fibers with orientation angles of 0°, 45°, 90° and crossply fibers was performed in vacuum, air and nitrogen atmosphere. The impact strength of the 45° ply composites increased from 149 kJ/m 2 to 15.5 × 10 2 kJ/m 2 after isothermal aging in vacuum at 200°C for 13 h. The interlaminar shear strength (ILSS) of the 90° ply composites increased from 3 to 4 MPa after isothermal aging at 184°C for 336 h in nitrogen atmosphere. The flexural strength of the 90° ply composites, however, remained unchanged (∼80 MPa) after isothermal aging in nitrogen at 184°C for 336 h. The impact strength of the 90 degree ply composites decreased by 20% (∼15 kJ/m 2 to 12 kJ/m 2 ) and 80% (∼15 kJ/m 2 to 3 kJ/m 2 ) after isothermal aging in nitrogen atmosphere at 184°C for 336 h and in air at 200°C for 336 h, respectively.