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Hydrothermal effects on the physico‐chemical properties of pure and glass fiber reinforced polyester and vinylester resins
Author(s) -
Ghorbel I.,
Valentin D.
Publication year - 1993
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.750140408
Subject(s) - materials science , composite material , glass transition , polyester , dynamic mechanical analysis , glass fiber , gravimetric analysis , modulus , polyester resin , young's modulus , polymer , organic chemistry , chemistry
The effect of aging by immersion in water at 60°C on polyester and vinylester resins, unreinforced and reinforced with glass fibers, was investigated. Changes in weight, glass transition temperature, secondary relaxations, and storage modulus, as well as loss modulus were measured, and the environmental effects on these parameters were assessed. Moreover, the chemical structure changes of the materials during aging were studied by the use of IR spectra. The evolution of the physico‐chemical and the mechanical properties as a function of the aging time was established. The results indicate the importance of the matrix morphology, the structure regularity, the presence of the fibers on the water diffusion mechanisms, and the thermomechanical properties through gravimetric changes, DSC, DMA and IR experiments.