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|標題:||The mass transport in poly(ethylene terephthalate) and related induced-crystallization||作者:||Hao, O.Y.
|關鍵字:||mass transport;PET;induced-crystallization;melting behavior;crystal perfection;acetone transport;poly(ethylene-terephthalate);diffusion;morphology;methanol;polymers;pmma||Project:||Polymer||期刊/報告no：:||Polymer, Volume 40, Issue 19, Page(s) 5401-5406.||摘要:||
The solvent transport in poly(ethylene terephthalate) (PET) and related phenomena were investigated. Based on Hannon'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 our study and is affected by the annealing atmospheres and the preheating environments. The mass transport in PET is accompanied by a large-scale structural rearrangement, which leads to the induced crystallization of the original amorphous state. During this process, the matrix is under compressive stress. Solvent-induced crystallization was confirmed by X-ray diffraction (XRD), Differential Scanning Calorimeter (DSC), which is quite different from the thermal crystallization. The different behaviors of sorption between the solvent-treated PET crystallites and thermally treated PET can be explained in terms of the results of XRD, DSC and density measurement. (C) 1999 Elsevier Science Ltd. All rights reserved.
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