TENSILE AND FRACTURE BEHAVIORS OF PET/PTT SIDE-SIDE BICOMPONENT FILAMENT

In this work, the tensile and fracture behaviors of PET/PTT side-side bicomponent filament are investigated by comparisons to single-component PTT and PET counterparts. Some unique tensile behaviors of PET/PTT are attributed to its spring-like curliness and low initial modulus of the PTT side. Tensile stress of PET/PTT is between that of PTT and PET in real extension region. The shape of hysteresis loops of PET/PTT looks like the combination of that of PTT and PET. The decay rates of loop width are measured, and loop numbers for PET, PTT, and PET/PTT needed to reach stable shape are predicted. We also use SEM to explore the fracture behaviors of PET/PTT by relating to those of PTT and PET. Some unique fracture behaviors of PET/PTT are found.