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Title: Water and water vapor sorption studies in poly(propylene)-zeolite composites
Authors: Pehlivan, Hilal
Özmıhçı, Filiz
Tıhmınlıoğlu, Funda
Balköse, Devrim
Ülkü, Semra
Keywords: Composites
Publisher: John Wiley and Sons Inc.
Source: Pehlivan, H., Özmıhçı, F., Tıhmınlıoğlu, F., Balköse, D., and Ülkü, S. (2003). Water and water vapor sorption studies in poly(propylene)-zeolite composites. Journal of Applied Polymer Science, 90(2), 352-359. doi:10.1002/app.12572
Abstract: Water and water vapor sorption to porous poly(propylene)zeolite composites prepared by hot pressing have been studied as a function of zeolite loading. This work presents the first report on the effect of the zeolite as a filler on the water sorption properties of PP composites. Water swelling experiments were conducted at 25°C using pure PP and PP-zeolite film samples having different zeolite loadings (6-40 wt%). Since PP is a hydrophobic polymer, it does not sorp any water, but the composites having 10, 20, 30, and 40% zeolite sorbed 0.63, 1.00, 1.72 and 3.74 wt% water, respectively. The zeolite itself at the same conditions sorbed 24.5 wt% water. As the filler loading in the composites increased, equilibrium uptake values increased too. On the other hand, water vapor sorption and kinetics has been studied using a Cahn 2000 gravimetric sorption system. Within in the range 0.35-0.95%, water vapor was adsorbed by the composites containing 10-40 wt% zeolite. Experimental effective water vapor diffusivities of the composite films were about one order of magnitude higher than the experimental water diffusion coefficient in composites. The transport of water in composites was slower than that in the liquid water due to the longer diffusion pathway and adsorption on the surface of the composites. Although the liquid water may fill all the voids in the composite, water vapor is adsorbed on the surface of the zeolite only.
ISSN: 0021-8995
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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