Mechanical dispersion of crosslinked polymers reinforced with randomly distributed short fiber

摘要

AbstractThe dynamic viscoelastic properties of composites reinforced with randomly distributed short glass and carbon fibers were studied in relation to the dependence on the fiber length, the mixing ratio of glass fibers of different length, and the kind of polymer matrix. Although the composite reinforced with glass fiber of 0.05 mm in length shows only one dispersion (α) corresponding to the primary transition of polymer matrix, those reinforced with 3‐ and 10‐mm glass fibers, and those reinforced with the mixture of 10‐ and 0.05‐mm glass fibers are characterized by two additional dispersions (α′ and α″) which appear on the lower frequency side or higher temperature side of the α‐dispersion. The composite reinforced with 3‐mm carbon fiber does not show the additional dispersions. The α′‐ and α″‐dispersions appear irrespective