Abstract

Polyethylene terephthalate (PET) microfiber of 1.5 denier per filament (dpf) has been irradiated with 3-MeV proton at two different fluences: 1 × 1013 and 1 × 1015p/cm2. Molecular deformation because of in-air proton irradiation straining of PET filaments has been investigated. Study of the effects of irradiation by using X-ray diffraction (XRD), Raman spectroscopy and Instron technique shows microstress and crosslinks on the surface of fiber (as revealed from XRD line shift and Raman shift). However, the Young's modulus is found to be larger at an irradiation dose of 1 × 1013p/cm2.

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