An ESR study of PVC fibres morphology; correlation with microscopic results (AFM TEM)

The particular microstructure of PVC chains plays a great role on the morphological organization. A heat treatment above the glass-transition temperature induces modifications of this organization. In order to follow the behavior of unstretched PVC fibres under heat treatment, we used the spinprobe technique. Data obtained show clearly that the chosen probe diffuses at room temperature into two morphological amorphous areas. Under heat treatment, we observe a modification of the morphological structure. TEM and AFM results are in good agreement with ESR data.