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|標題:||Ethyl-acetate transport in poly(ethylene terephthalate)||作者:||Hao, O.Y.
|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.||摘要:||
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].
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