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The diffusion of water into pet followed in‐situ using FT‐IR ATR
Author(s) -
Sammon Christopher,
Everall Neil,
Yarwood Jack
Publication year - 1997
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19971190119
Subject(s) - crystallinity , comonomer , annealing (glass) , diffusion , fourier transform infrared spectroscopy , materials science , in situ , sorption , glass transition , analytical chemistry (journal) , polymer , polymer chemistry , chemistry , chemical engineering , thermodynamics , chromatography , organic chemistry , composite material , monomer , adsorption , engineering , physics
The diffusion of water into PET containing a comonomer has been followed in‐situ using FT‐IR ATR. Varying degrees of crystallinity were induced into the polymer by annealing at 85°C (above the glass transition temperature). The diffusion coefficients were calculated by a least squares fit of the experimental diffusion data to theoretical sorption curves and are found to decrease with increased crystallinity. Some evidence for a crystalline ‘skin’ is discussed.
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