Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10627685 | Composites Part A: Applied Science and Manufacturing | 2005 | 7 Pages |
Abstract
Thermoplastic poly(ethylene terephthalate) (PET) fibers have been used to toughen an intrinsically brittle epoxy resin with high glass transition temperature. The morphologies and chemical properties of the as-received and the surface-modified PET fibers are comparatively investigated by scanning electron microscopy (SEM) and time-of-flight static secondary ion mass spectrometry (ToF-SIMS). Strong fiber-matrix adhesion is successfully achieved by optimizing surface modification of PET fibers with NaOH. Compared with neat epoxy resin, the fracture toughness of PET fibers filled epoxy composites is almost doubled when loading only 1Â wt% chemically treated fiber. The fracture behavior and toughening mechanisms are studied by SEM observations on the fracture surfaces. Good correlation is found between the surface morphologies of the treated fibers, the fracture surfaces and the observed fracture toughness. SEM shows that fiber pullout, fiber breakage and formation of step structures due to fiber addition are among the operative toughening mechanisms observed.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Su Fern Teh, Tianxi Liu, Lei Wang, Chaobin He,