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Fourier transform Raman study of the conformers in poly(ethylene terephthalate)

✍ Scribed by J. C. Rodríguez-Cabello; L. Quintanilla; J. M. Pastor

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
708 KB
Volume
25
Category
Article
ISSN
0377-0486

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✦ Synopsis

Abstract

Fourier transform (FT) Raman spectroscopy has been proved to be an adequate technique for the study of the quantitative structural changes which take place in poly(ethylene terephthalate) on annealing. The two‐phase conformational model proposed previously in the infrared domain using photoacoustic FTIR has been extended to the Raman domain. Moreover, typical Raman spectral changes with the thermal process have been directly related to conformational rather than crystallinity changes. The correlation between the percentage of the trans isomer obtained by FT‐Raman and skin layer crystallinity values obtained by differential scanning calorimetry allows the crystalline and amorphous trans isomer contents to be obtained and their evolution with the annealing process to be followed.

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