AN ESR STUDY OF PVC FIBERS 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-transitio n temperature induces modifications of this organization, In order to follow the behavior of unstretched PVC fibres under heat treatment, we used the spin-probe technique. Data obtained show clearly that the ch osen probe diffuses at room temperature into two morphological amorpho us areas. Under heat treatment, we observe a modification of the morph ological structure. TEM and AFM results are in good agreement with ESR data.