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Structure changes in PVC at high temperatures as determined from X-ray diffractometer curves |
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| Authors: | S J Guerrero D Meader A Keller |
| Institution: | 1. H. H. Wills Physics Laboratory University of Bristol , Bristol, BS8 1TL, United Kingdom;2. Departamento de Ciencia de los Materiales, Aptdo. , Universidad Simon Bolivar , 80659, Caracas 108, Venezuela;3. H. H. Wills Physics Laboratory University of Bristol , Bristol, BS8 1TL, United Kingdom |
| Abstract: | X-ray diffractometer traces obtained from PVC samples maintained at temperatures in the range 180 to 200°C indicate that crystal melting is followed by a state of intermediate order rather than by a truly amorphous state. In addition, this study raises serious doubts regarding the validity of the assumption that the x-ray scattering profile from quenched PVC samples is representative of the amorphous phase. Any crystallinity values derived on the basis of that assumption are therefore open to question. |
| Keywords: | Poly(vinyl alcohol) Molecular dynamics simulation Physical properties Water Diffusion |