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https://hdl.handle.net/11147/1943
Title: | Understanding the Effect of Skin Formation on the Removal of Solvents From Semicrystalline Polymers | Authors: | Wong, Sim-Siong Alsoy Altınkaya, Sacide Mallapragada, Surya K. |
Keywords: | Crystalline materials Multicomponent systems Polymer crystallization Polymers |
Publisher: | John Wiley and Sons Inc. | Source: | Wong, S.S., Alsoy Altınkaya, S., and Mallapragada, S.K. (2005). Understanding the effect of skin formation on the removal of solvents from semicrystalline polymers. Journal of Polymer Science, Part B: Polymer Physics, 43(22), 3191-3204. doi:10.1002/polb.20615 | Abstract: | The effect of glassy skin formation on the drying of semicrystalline polymers was investigated with a comprehensive mathematical model developed for multicomponent systems. Polymers with high glass-transition temperatures can become rubbery at room temperature under the influence of solvents. As the solvents are removed from the polymer, a glassy skin can form and continue to develop. The model takes into account the effects of diffusion-induced polymer crystallization as well as glassy-rubbery transitions on the overall solvent content and polymer crystallinity. A Vrentas-Duda free-volume-based diffusion scheme and crystallization kinetics were used in our model. The polymer-solvent system chosen was a poly(vinyl alcohol) (PVA)-water-methanol system. The drying kinetics of PVA films were obtained by gravimetric methods with swollen films with known water/methanol concentrations. The overall drying behaviors of the polymer system determined by our model and experimental methods were compared and found to match well. | URI: | http://doi.org/10.1002/polb.20615 http://hdl.handle.net/11147/1943 |
ISSN: | 0887-6266 0887-6266 1099-0488 |
Appears in Collections: | Chemical Engineering / Kimya Mühendisliği Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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