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Tuesday, July 21, 2020 | History

3 edition of Diffusion of Hydrocarbons in polyisoleutylene found in the catalog.

Diffusion of Hydrocarbons in polyisoleutylene

Stephen Praeger

Diffusion of Hydrocarbons in polyisoleutylene

by Stephen Praeger

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  • 11 Currently reading

Published .
Written in English


Edition Notes

Thesis (Ph. D.)-Cornell University. Microfilm of typescript. Ann Arbor:University Microfilms, 1951. 1 reel. 35mm.

The Physical Object
FormatMicrofilm
Pagination85p.
Number of Pages85
ID Numbers
Open LibraryOL13693684M

Information on the molecular dynamics of n-butane and 2-butyne, sorbed in silicalite-1, has been obtained from both sorption kinetics and C NMR spectral lineshape analysis. The adsorption/desorption rates were measured by the recently developed single-step frequency-response technique. In contrast to -butane the so. Hydrocarbons and their transformations play major roles in chemistry as raw materials and sources of energy. Diminishing petroleum supplies, regulatory problems, and environmental concerns constantly challenge chemists to rethink and redesign the industrial applications of hydrocarbons. Written by Nobel Prize-winner George Olah and hydrocarbon expert Árpád .

Diffusion of Saturated Hydrocarbons Diffusion of Unsaturated and Aromatic Hydrocarbons In NaX Other Systems PFG NMR Diffusion Measurements with Different Probe Nuclei ) where he was Chair of the Chemical Engineering Department. In addition to the fi rst edition of the present book (Wiley, New York, ) he is the author of Principles.   The following hypotheses have been proposed as a explanation for weathering: (1) weathering results in a slow diffusion of the hydrocarbon fraction in the solid fraction of the organic matter in the soil; (2) the contaminant slowly diffuses through the soil and becomes sorbed and trapped in the soil nano-and micropores (Semple et al.,

  Carl Yaws, a leading authority on chemical compounds in the chemical engineering field, has done it again. In Transport Properties of Chemicals and Hydrocarbons -- an essential volume for any chemist or chemical engineer’s library -- he has amassed over 7, organic and inorganic chemicals, and hydrocarbons. The hydrocarbons that we are going to look at are called aliphatic aliphatic compounds are divided into acyclic compounds (chain structures) and cyclic compounds (ring structures). The chain structures are further divided into structures that contain only single bonds (alkanes), those that contain at least one double bond (alkenes) and those that contain at least .


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Diffusion of Hydrocarbons in polyisoleutylene by Stephen Praeger Download PDF EPUB FB2

Infinite dilution diffusion coefficients of n-hexane, n-heptane and n-octane in polyisobutylene by inverse gas chromatographic measurements. European Polymer Journal37 (8), DOI: /S(01) Seong U.

Hong, Timothy A. by:   Diffusion of Benzene and Methylene Chloride Vapors into Polystyrene1,2. Journal of the American Chemical Society75 (9), DOI: /jaa Willard T. Grubb, Robert C. Osthoff. Physical Properties of Organosilicon Compounds.

Trimethylsilanol and by: Diffusion in the polyisobutylene-solvent systems was studied at 20, 35 and 50 The coefficients of diffusion quoted in this communication are the average of three to five measurements. In all the systems studied the variation in the coefficient of mutal diffusion with composition follows a curve containing a by: A study of the factors affecting the diffusion of chlorinated hydrocarbons into polyisobutylene and polyethylene-co-propylene for evanescent wave sensing Article in.

A Fickian diffusion model was used to quantify the diffusion process. The diffusion model calculated a diffusion coefficient based on such parameters as refractive index of the polymer cladding and light guiding core, the polymer cladding thickness and the principal analyte wavelength of detection.

The diffusion of analyte isomers was by: A study of the factors affecting the diffusion of chlorinated hydrocarbons into polyisobutylene and polyethylene-co-propylene for evanescent wave sensing. R Howley, B.D MacCraith, K O’Dwyer, P Kirwan, P McLoughlin, A study of the factors affecting the diffusion of chlorinated hydrocarbons into polyisobutylene and polyethylene-co-propylene for evanescent wave sensing, Vibrational Spectroscopy, /S(03), 31, 2, (), ().

A common method of investigating the diffusion of a chemical species in a solid material is to expose a slab of the material to the diffusing species at time t.

Hydrocarbons 1 By Alphonse F. J:o'orziati,2 William R. Norris, and Frederick D. Rossini Measurements of vapor pressures and boiling points, over the range 48 to milli­ meters of mercury, and above about C, were made on 60 purified hydrocarbons.

The. The diffusion of hydrocarbon molecules into and through the polymer network was also found to be a crucial factor when evaluating the detection limit of the MIR-ATR sensor.

A number of studies determined the diffusion coefficients of several hydrocarbons in various polymers and showed that this is another important parameter to consider when. Discover the best Diffusion books and audiobooks.

Learn from Diffusion experts like Carl L. Yaws and Elsevier Books Reference. Read Diffusion books like Transport Properties of Chemicals and Hydrocarbons and Diffusion in Solids with a free trial. Usually, the molecular diffusion through the polymer membrane is the slowest and, thus, the rate-determining step in the permeation process.

Diffusion can be described with Fick’s Law (). It states that at a steady state, the flux going through a unit area of polymer membrane (A) is proportional to the concentration (dc/dx) or pressure.

Diffusion coefficients in air at °K and 1 atm pressure are reported for ethane, ethene, ethyne, cyclopropane, propene, propadiene, propyne, butane, 1-butene, 2-methylpropene, cisbutene, transbutene, 1,3-butadiene, 1-butyne, 2-methylbutane, 2,2-dimethylpropane, cyclopentane, and 1-pentene.A linear relationship, valid for alkanes and alkenes, has been found between the diffusion.

The diffusion and thermal diffusion of hydrogen-deuterium, with a note on the thermal diffusion of H2-Ne. Proc.R. Soc. London. Ser.A () - CrossRef Google Scholar 11 hours ago  In this study, we investigated the removal mechanism of total petroleum hydrocarbons (TPH) from soil by microwave heating.

TPH contaminated soil was investigated to determine the desorption behavior of five carbon number-based fractions of TPH. The applied operating microwave power density influenced the final temperature that was reached during.

Diffusion of Hydrocarbons Through Rubber Membranes Showing of 37 pages in this thesis. PDF Version Also Available for Download.

Description. This thesis explores the seperation of isomeric paraffins in organic chemistry and how the resulting mixture of hydrocarbons might be. [26] J. Vrentas and C. Vrentas, A new equation relating self-diffusion and mutual diffusion coefficients in polymer-solvent systems, Macromolecules 26 (), no.

22, –, DOI. Crossref Google Scholar [27] J. Vrentas and C. Vrentas, Prediction of mutual diffusion coefficients for polymer–solvent systems, J. Appl. Polym.

Chlorinated aliphatic hydrocarbons and chlorinated aromatic hydrocarbons (CHCs) are a class of highly toxic and persistent contaminants commonly found in the environment 1, which pose a substantial threat to the ecological system and human healtheffective monitoring and control of these contaminants are essential.

Abstract. Butyl rubber and polyisobutylene are elastomeric polymers 1 used quite widely in adhesives and sealants both as primary elastomeric binders and as tackifiers and modifiers.

The principal difference between these polymers is that butyl is a copolymer of isobutylene with a minor amount of isoprene, which introduces unsaturation, while polyisobutylene is a. However, the lack of significant transport of benzene and toluene through barriers or seals indicates diffusion and active aqueous solution transport are minor mechanisms of the accumulation process.

Figure 2 shows the diffusion of gas in water as a function of concentration at origin and distance from origin (free hydrocarbons).

Capillary. By far the most common reaction of hydrocarbons is combustion, which is the combination of a hydrocarbon with O 2 to make CO 2 and H 2 O. The combustion of hydrocarbons is accompanied by a release of energy and is a primary source of energy production in our society (Figure “Combustion”).Atoms and molecules in all states of matter are subject to continuous irregular movement.

This process, referred to as diffusion, is among the most general and basic phenomena in nature and determines the performance of many technological processes. This book provides an introduction to the fascinating world of diffusion in microporous solids.

Jointly written by three well-known .Butyl rubber, sometimes just called "butyl", is a synthetic rubber, a copolymer of isobutylene with abbreviation IIR stands for isobutylene isoprene rubber.

Polyisobutylene, also known as "PIB" or polyisobutene, (C 4 H 8) n, is the homopolymer of isobutylene, or 2-methylpropene, on which butyl rubber is based. Butyl rubber is produced by polymerization of about .