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標題: Ethyl-acetate transport in poly(ethylene terephthalate)
作者: Hao, O.Y.
Shore, S.H.
關鍵字: glassy polymers;crystalline poly(ethylene-terephthalate);mechanical;deformation;methanol transport;diffusion;morphology;pmma;orientation
Project: Journal of Applied Physics
期刊/報告no:: Journal of Applied Physics, Volume 85, Issue 2, Page(s) 1148-1152.
The effect of annealing atmosphere on the transport of ethyl-acetate in poly(ethylene terephthalate! (PET) and related phenomena were investigated. Based on Harmon's model for case I (Fickian), case II (swelling) and anomalous transport, the data of mass uptake were analyzed. Pure case I or case II behavior did not appear in the PET-ethyl-acetate system and is affected by the atmosphere of annealing. The variations of conformations was studied by the Fourier-transform infrared. The mass transport in PET is accompanied by a large-scale structural rearrangement, which leads to the induced crystallization of the original amorphous state. The preferred growth plane varies under the influence of different solvents. Solvent-induced crystallization was confirmed by x-ray diffraction, differential scanning calorimeter, and density measurement. The different behaviors of sorption between the solvent-treated PET crystallites and thermally treated PET can be explained in terms of the results from density measurement. (C) 1999 American Institute of Physics. [S0021-8979(99)07801-9].
ISSN: 0021-8979
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