2 edition of Permeability of organic materials to gases found in the catalog.
Permeability of organic materials to gases
Clarence J. West
Has supplement 1 (1956) by Sally Wilkinson, Curtis L. Brown and Jack Weiner and supplement 2 (1964) by Jack Weiner and Lillian Roth.
|Statement||Clarence J. West, Walter B. Kunz and George R.Sears.|
|Series||Institute of Paper Chemistry bibliographic series -- no. 169|
|Contributions||Kunz, Walter B., Sears, George R., Institute of Paper Chemistry.|
|The Physical Object|
The fundamental reason for the permeability of polymers is their relatively high level of molecular motion, a factor which also leads to their high levels of creep in comparison with ceramics, glasses and metals. The aim of this volume is to examine some timely applied aspects of polymer permeability. Request PDF | On Jan 1, , S.A. Stern and others published Permeability of polymers to gases and vapors | Find, read and cite all the research you need on ResearchGate.
Permeation of molecules from a gas or liquid through plastic materials is interesting in many contexts, both in terms of maintaining gas inside a lightweight container and in terms of keeping products/enviroments free of atmospheric gases such as nitrogen, oxygen or CO theoretic basis for the gas transmission rate or gas permeability is described briefly below. gases, which were not usually neglected (including some inert gases), should be taken into consideration in package testing. Oxygen and water vapor permeability test have been applied widely. This article is to discuss the test method of permeability of nitrogen, carbon dioxide, air and other conventional gases to various packaging materials. 1.
The MOF-modified mixed matrix membrane (MMM) was subjected to gas permeability tests, using gas permeability apparatus (GPA). GPA results showed that adding 10wt% MOF to the membrane increased permeabilities of N 2 and CO 2 gases by up to 34%, and by 19% . F Test Method for Measurement of Diffusivity, Solubility, and Permeability of Organic Vapor Barriers Using a Flame Ionization Detector. F Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector.
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IPC Bibliographic Series No Permeability of Organic Materials to Gases (4 vols). [Weiner, Jack, & Jerry Byrne, ] on *FREE* shipping on qualifying offers. IPC Bibliographic Series No Permeability of Organic Materials to Gases (4 vols).Author: Weiner, Jack, & Jerry Byrne.
Therefore, by conducting a gas permeability test at different pressures and plotting k g versus 1/P m, an equivalent permeability of liquids can be obtained. Based on this theory, Klinkenberg determined the intrinsic permeability with nitrogen, hydrogen, and carbon dioxide, and found that there exists a common permeability value for these gases.
As polymer materials have different polarity, the change of solubility coefficient has become the main factor that influences the permeability of gases in various materials.
If the polymer does not have functional group which could interact with gases, the critical temperature is. desorption gases can be distinguished from the test gas, and pinholes in, or leaks around, the membrane are readily recognized.
However, the technique is time consuming for film of low permeability or for higher molecular weight gases such as krypton or xenon.
The Dow film permeability cell3 has the advantage of greater speed because. The analog of the Kozeny-Carman formula in liquids for the Darcy coefficient or the permeability coefficient is represented for gases. The transition between these limiting cases results from the relation between the mean free path of an individual molecule in a liquid or gas λ and the mean free path of this molecule with respect to its.
Permeability properties are essential data for the selection of materials and design of products across a broad range of market sectors from food packaging to Automotive applications to Medical Devices. This unique handbook brings together a wealth of permeability data in a form that enables quick like-for-like comparisons between materials.
Permeability in fluid mechanics and the Earth sciences (commonly symbolized as k) is a measure of the ability of a porous material (often, a rock or an unconsolidated material) to allow fluids to pass through it.
The permeability of a medium is related to the porosity, but also to the shapes of the pores in the medium and their level of connectedness. Permeability of plastic films and coatings to gases, vapors, and liquids Vivian Stannett, American Chemical Society. Division of Organic Coatings and Plastics Chemistry Snippet view - Methods for measuring gas permeability can be divided into two main catagories: the constant-volume variable-pressure method, and the gas concentration method.
We use the second method as it provides us with highly reproducible measurements, and allows us to measure the diffusion of multiple components in a gas or liquid mixture, each component.
Gas Permeability the property of solids that allows the passage of a gas through the body in the presence of a pressure differential.
A distinction is made, depending on the structure of the solid and the magnitude of the pressure differential, among three main types of gas permeability: diffusion flow, molecular effusion, and laminar flow.
Diffusion. Permeability of Plastic Films and Coatings To Gases, Vapors, and Liquids. Modification of Polymer Membrane Permeability by Graft Copolymerization. Pages Book Subtitle To Gases, Vapors, and Liquids Editors. Harold Hopfenberg; Series Title Polymer Science and Technology. THE PERMEABILITY OF POROUS MEDIA TO LIQUIDS AND GASES "f L.
KLINKENBERG " ABSTRACT The standard procedure for determining the permea- bility of porous media according to APZ Code No. 27 (first edition, October ) is based on the funda- File Size: KB.
CO2 Permeability of Polystyrene Nanocomposites and Nanocomposite Foams. Industrial & Engineering Chemistry Research47 (23), DOI: /ie Charleton B. Moore and Julie A. Canepa. Geological and inorganic materials. Analytical Chemistry55 (5), DOI: /acaCited by: Permeability is the ability to support formation of magnetic fields in a material.
Permeability is measured in H/m (henries/m) or newtons/ampere 2 (N/A 2). The Permeability of Free Space. The permeability of free space µ 0 (the permeability constant or the magnetic constant) is. µ 0 = 4π 10 −7 (H/m) ≈ 10 −6 (H/m, N/A 2).
The Relative Permeability. ABSTRACT The standard procedure for determining the permeability of porous media according to APZ Code No. 27 (first edition, October ) is based on the fundamental assumption that, as long as the rate of flow is proportional to the pressure gradient, the permeability constant of a porous medium is a property of the medium, and is independent of the fluid used in its determination.
In organic materials, the semiconducting behavior is an intrinsic property, hard-wired into their molecular structures as opposed to the governance of the behavior of inorganic semiconductors by the impurities and defects in the crystal lattice.
Barrer, in Permeability of Plastic Films and Coating to Gases, Vapors, and Liquids, edited by H. Hopfenberg (Plenum Press, New York, ), p. Cited by: The use of polymer materials in food packaging field is one of the largest growing market area.
Actually the optimization behaviour of packaging permeability is of crucial importance, in order to extend the food shelf-life and to reach the best engineering solution. Studying the permeability characterization of the different polymer material (homogeneous and heterogeneous polymer system) to Cited by: The measured permeability coefficients have been used to assess the ability of all materials tested to act as a functional polymer liner in a standard COPV with final leak rates predicted based on.
Get this from a library. Permeability of plastic films and coatings to gases, vapors, and liquids: [proceeding of the Borden Award Symposium of the Division of Organic Coatings and Plastics Chemistry of the American Chemical Society, honoring Professor Vivian T.
Stannett]. [Harold B Hopfenberg; Vivian Stannett; American Chemical Society. Properties of Films against Gases, Jon A. Ylvisaker. 6. F Standard Test Method for Evaluation of Solubility, Diffusivity, and Permeability of Flexible Barrier Materials to Water Vapor, Annual Book of ASTM Standards, Vol.The American Society for Testing and Materials.
7.Fundamentals of Fluid Flow in Porous Media Chapter 2 Permeability Permeability is a property of the porous medium that measures the capacity and ability of the formation to transmit fluids.
The rock permeability, k, is a very important rock property because it controls the directional movement and the flow rate of the reservoir fluids .The transport of small gases (H2, CO2, N2, O2) through a series of novel membranes based on necklace-shaped inorganic polymers ([email protected]), in which a polyhedral oligomeric silsesquioxane (POSS) cage unit and soft chains of oligo-dimethyl siloxane (DMS) were alternately connected, was investigated.
The influence of the DMS chain length and crosslinking density of the [email protected] on Author: Roman Selyanchyn, Shigenori Fujikawa, Naohiro Katsuta, Kazuya Suwa, Masashi Kunitake.