Download or read book Effect of 2 nonanone Vapor on the Oxygen and Carbon Dioxide Permeability of Two Polymer Films written by DeLynne Vail and published by . This book was released on 1998 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Ethanol Vapor on the Oxygen Permeability of Packaging Polymer Films written by Sriprinya Ampolsak and published by . This book was released on 1992 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeability of Plastic Films and Coated Paper to Gases and Vapors written by Technical Association of the Pulp and Paper Industry and published by . This book was released on 1962 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeability of Plastic Films and Coatings written by Harold Hopfenberg and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of the Chemical Nature of High Polymers on Gas and Vapor Transport written by V. T. Stannett and published by . This book was released on 1973 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two additional high vacuum permeability stations suitable for time lag measurements of the diffusion constants have been built and are very briefly described. The permeabilities, diffusivities and solubilities of helium, neon, argon, oxygen, nitrogen and carbon dioxide have been measured at various temperatures in polyacrylonitrile. The activation energies, heat of solution and the preexponential factors have been calculated. Abnormally low permeability and diffusion constants were found with high activation energies. Some reasons for this behavior are presented. The corresponding transport behavior of helium, neon, argon, krypton and nitrogen in polystyrene has also been measured and the results presented together with the known values for oxygen, and carbon dioxide. (Modified author abstract).
Download or read book Carbon Dioxide Plasticization and Conditioning of Thin Glassy Polymer Films Monitored by Gas Permeability and Optical Methods written by Norman Randall Horn and published by . This book was released on 2012 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research project investigated physical aging and carbon dioxide plasticization behavior of glassy polymer films. Recent studies have shown that thin glassy polymer films undergo physical aging more rapidly than thick films. This suggests that thickness may also play a role in the plasticization and conditioning responses of thin glassy films in the presence of highly-sorbing penetrants such as CO2. The effect of film thickness on CO2 permeation and sorption was studied extensively through carefully defined and controlled methods that provide a basis for future study of plasticization behavior. Thin films are found to be more sensitive than thick films to CO2 exposure, undergoing more extensive and rapid plasticization at any pressure. The response of glassy polymers films to CO2 is not only dependent on thickness, but also on aging time, CO2 pressure, exposure time, and prior history. Thin films experiencing constant CO2 exposure for longer periods of time exhibit an initial large increase in CO2 permeability, which eventually reaches a maximum, followed by a significant decrease in permeability for the duration of the experiment. Thick films, in contrast, do not seem to exhibit this trend for the range of conditions explored. For a series of different polymers, the extent of plasticization response tracks with CO2 solubility. There is little data available for gas sorption in thin glassy polymer films. In this work, a novel method involving spectroscopic ellipsometry is used to obtain simultaneously the film thickness and CO2 sorption capacity for thin glassy polymer films. This allows a more comprehensive look at CO2 permeability, sorption, and diffusivity as a function of both CO2 pressure and exposure time. Like the gas permeation data, these experiments suggest that thin film sorption behavior is substantially different than that of thick film counterparts. Dynamic ellipsometry experiments show that refractive index minima, fractional free volume maxima, and CO2 diffusivity maxima correlate well with observed CO2 permeability maxima observed for thin Matrimid® films. These experiments demonstrate that plasticization and physical aging are competing processes. Aging, however, dominates over long time scales. Over time, CO2 diffusivity is most affected by these competing effects, and the evolution of CO2 diffusivity is shown to be the main contributing factor to changes in CO2 permeability at constant pressure.
Download or read book Transport Phenomena Through Polymer Films written by Charles A. Kumins and published by . This book was released on 1973 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Sorbed Vapors on the Permeability of High Polymer Films to Gases written by Frank Louis Pilar and published by . This book was released on 1957 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Food Packaging written by Sara J. Risch and published by . This book was released on 2000 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: No longer just passive containers, food packaging now serves to extend shelf life, improve the quality of the products, and even substitute for cookware. This book covers a range of new developments in packaging materials, including "active" packaging, techniques for establishing the safety of materials, and the use of edible films.
Download or read book The Permeability of Binary Organic Vapor Mixtures Through a Biaxially Oriented Polypropylene Film written by Taryn Marie Hensley and published by . This book was released on 1991 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeation of Oxygen and Water Vapor Through Various Types of Polymer and Composite Films written by Kirti C. Mehta and published by . This book was released on 1968 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxygen Permeability of Free Paint Films written by Janice I. Kellerman and published by . This book was released on 1960 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Permeability of Binary Organic Vapor Mixtures Through Polymer Membranes by a Dynamic Purge and Trap thermal Desorption Procedure written by Teerapong Laoharavee and published by . This book was released on 1998 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Change in Water Vapor Permeability of Polymer Films Treated with Osmium Tetroxide written by Helen Ghiradella and published by . This book was released on 1978 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crystallinity and Density in Permeation of Carbon Dioxide and Water Vapor Through Polymers written by Koo-Wha Kim Koh and published by . This book was released on 1970 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transport Phenomena in Polymeric Films written by American Chemical Society and published by . This book was released on 1965 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeability of Organic Materials to Gases and Vapors written by Sally Wilkinson and published by . This book was released on 1956 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
