Last edited by Kagacage
Friday, November 27, 2020 | History

2 edition of effects of polymer degradation on flow properties of fluids and lubricants containing polymers found in the catalog.

effects of polymer degradation on flow properties of fluids and lubricants containing polymers

Symposium on the Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants (1964 Atlantic City)

effects of polymer degradation on flow properties of fluids and lubricants containing polymers

a symposium.

by Symposium on the Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants (1964 Atlantic City)

  • 172 Want to read
  • 29 Currently reading

Published by American Society for Testing and Materials in Philadelphia .
Written in English

    Subjects:
  • Polymers and polymerization -- Congresses.,
  • Fluids -- Congresses.,
  • Lubrication and lubricants -- Congresses.

  • Edition Notes

    GenreCongresses.
    SeriesASTM special technical publication, no. 382
    ContributionsASTM Committee D-2 on Petroleum Products and Lubricants.
    Classifications
    LC ClassificationsTP156.P6 S9 1964
    The Physical Object
    Paginationvi, 82 p.
    Number of Pages82
    ID Numbers
    Open LibraryOL5945351M
    LC Control Number65016812
    OCLC/WorldCa1700214

      HT POLYMER MUDS Most polymer systems are maintained with: Low solids content Clay inhibition This will extend temperature stability The Polymers of the polymer mud system are Susceptible to degradation by: Cleavage of the polymer chain Possible chemical modification of the attached groups Hydrolysis & Oxidation controlled by: Maintaining the pH. analysis of the flow behavior in the particulate suspension systems of polymers is investigated in wide ranges of shear rates using rheometry technique. Our findings indicate both polymer molecular weight and particle concentration play important roles in controlling the properties of the flow. The details of the. The first half of the text sets forth the general theory and concepts underlying polymer processing, such as the viscoelastic response of polymeric fluids and diffusion and mass transfer. Next, the text explores specific practical aspects of polymer processing, including mixing, extrusion dies, . In this work, thermoplastic polyurethane (TPU) composites incorporated with wt% Cu particles were synthesized by the melt blending method. The effect of the incorporated copper particle size on the antibacterial, thermal, rheological, and mechanical properties of TPU was investigated. The obtained results showed that (i) the addition of copper particles increased the thermal and mechanical.

    Ask me for any book. On Telegram. Join our community of lecturers and students. Home Search Results for "proteins structures and properties" definable elements definable constants minimal structure order-minimal structures definable sets complex numbers first-order properties .


Share this book
You might also like
Seeds of desire

Seeds of desire

Memoirs of the most eminent American mechanics

Memoirs of the most eminent American mechanics

Moon Silver

Moon Silver

The nature of man in contemporary American physical education philosophy

The nature of man in contemporary American physical education philosophy

Report Louisville employment survey, March 16 to May 16, 1933.

Report Louisville employment survey, March 16 to May 16, 1933.

Shopping for towels

Shopping for towels

Plan of a provisional government for the Southern Confederacy

Plan of a provisional government for the Southern Confederacy

Hypnotism

Hypnotism

A guide to the Grosvenor Museum, Chester.

A guide to the Grosvenor Museum, Chester.

How to use circle grid analysis for die tryout

How to use circle grid analysis for die tryout

Dark est knight

Dark est knight

Attack is the best defence.

Attack is the best defence.

Aspects of ancient Near Eastern chronology (c. 1600-700 BC)

Aspects of ancient Near Eastern chronology (c. 1600-700 BC)

Tension control

Tension control

effects of polymer degradation on flow properties of fluids and lubricants containing polymers by Symposium on the Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants (1964 Atlantic City) Download PDF EPUB FB2

The Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants Containing Polymers. Effect of Polymer Structure on Shear Stability of Polymer-Thickened Power Transfer Fluids. Viscosity Loss in Polymer-Thickened Oils During Use. Effect of Some High-Energy Sources on Polymer-Thickened Lubricants.

Symposium on the Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants ( Atlantic City). Effects of polymer degradation on flow properties of fluids and lubricants containing polymers.

Philadelphia, American Society for Testing and Materials [] (DLC) (OCoLC) Material Type. Symposium on the Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants ( Atlantic City). Effects of polymer degradation on flow properties of fluids and lubricants containing polymers.

Philadelphia, American Society for Testing and Materials [] (OCoLC) Material Type: Conference publication: Document Type. Books about The Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants Containing Polymers. Language: en Pages: effects of polymer degradation on flow properties of fluids and lubricants containing polymers book field of polymer degradation and stabilization has become a subject of central importance in polymer science and technology.

This book provides a fundamental source of information designed for those. An important practical problem in the application and study of drag reduction by polymer additives is the degradation of the polymer, for instance due to intense shearing, especially in recirculatory flow systems.

Such degradation leads to a marked loss of the drag-reducing capability of the polymer. Three different polymer types were tested on degradation effects in a closed pipe flow Cited by: STP The Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants Containing Polymers STP Hydrocarbon Analysis STPA Physical Constants of Hydrocarbons C 1 to C STP Symposium on Lubricants for Automotive Equipment STP Symposium on Non-Newtonian Viscometry.

Introduction The degradation of polymers and plastics is a vastly interesting and technologically important field. Thin films of polymers and plastics are worth special consideration, separate from studies of bulk materials because there are many phenomena that occur in thin films that are relatively unimportant in bulk polymers, but result in radically different structural properties.

1,2. Degradation leads finally to polymer erosion, the loss of material from the polymer bulk. The resulting changes in morphology, pH, oligomer and monomer properties as well as crystallinity are illustrated with selected examples.

Finally, a brief survey on. Degradation of Plastics and Polymers D. Hourston Department of Materials, Loughborough University, UK properties of the given polymer very significantly.4,5 It is difficult to provide a satisfactory definition of flow, but may also be brought into a non-fluid form in.

Polymer degradation includes all changes in both the chemical structure and physical properties of polymers or polymer-based products that lead to the loss of properties such as tensile strength, color, shape, etc., under the influence of processing conditions, or one or more environmental factors (e.g., heat, light, or exposure to chemicals) (Hawkins, b; Matusinovic and Wilkie, ).

The environmental concerns regarding the final fate of polymer objects is a very important challenge for the plastic industry. Among the different strategies to decrease or to eliminate the presence of plastic waste in the environment and to decrease the amount of plastic coming from oil, recycling is one of the more important tools.

Mehrdad Seifali Abbas-Abadi, The effect of process and structural parameters on the stability, thermo-mechanical and thermal degradation of polymers with hydrocarbon skeleton containing PE, PP, PS, PVC, NR, PBR and SBR, Journal of Thermal Analysis and Calorimetry, /s, ().

The effect of sequence on copolymer properties is rarely studied, especially the degradation behavior of the biomaterials.

A series of linear-comb block, gradient, random copolymers were successfully achieved using hydroxylated polybutadiene as the macroinitiator by simple ring-opening polymerization of l -lactide (l -LA) and 1,3-trimethylene. Flow Properties of Polymers Time-independent Fluids.

Polymer solutions, dispersions, and melts are usually non-Newtonian liquids. This means their apparent viscosity (η) 1 depends on the applied shear rate and increases rapidly with increasing molecular weight (number of repeat units).

Thus, the viscosity of a polymer melt is always larger than that of the corresponding monomer. Polymers present to modern society remarkable performance characteristics desired by a wide range of consumers but the fate of polymers in the environment has become a massive management problem.

Polymer applications offer molecular structures attractive to product engineers desirous of prolonged lifetime properties. These characteristics also figure prominently in the. Compounds of plant origin are used with polymers as functional additives. However, these substances often have biological (antimicrobial) activity.

The bactericidal and fungicidal properties of natural additives can affect the composting process of biodegradable polymers. The scientific novelty of the manuscript is the investigation of the effect of the addition of herbal antimicrobial.

A theory for the shear degradation of high polymers is presented. It assumes the molecules to exist in the rubbery or liquid state and does not include the effects of chemical reactions which might occur subsequent to chain rupture.

The computation shows that the entanglements along the chains play a major part in the rupture process.

Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology.

Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the. Shear Stability and the Relationship to Heavy Duty Engine Lubricants; Mobil Hydraulic Fluid Shear Stability; The Effects of Polymer Degradation on Flow Properties of Fluids and Lubricants Containing Polymers; Using Engine Oil to Improve Fuel Economy; Understanding Viscosity Index Improvers; How to Determine Engine Oil Quality.

Flow Properties of Polymers Time-dependent Fluids. Many substances, particularly food, pharmaceutical and personal care products display flow behavior that depends on the shear history. Time-dependent changes in viscosity have also been reported for a number of polymer.

The focus of this chapter is on polymers and their use to enhance oil recovery through the process known as polymer flooding. Emphasis is given to practical information relevant to field application(s) of polymer flooding.

Therefore, the purpose of this chapter is to provide a brief but thorough overview of key concepts necessary to understand this technology for its successful. Hydrocarbon lubricants, bulk polymers and polymer containing hydrocarbon solutions were examined.

Small samples (10−8 m3) of test lubricant were extracted from the entrance and exit regions of. Thermal degradation of deoxybenzoin polymers studied by pyrolysis-gas chromatography/mass spectrometry T. Ranganathana, Michael Beaulieua, Joseph Zilbermana, Kenneth D. Smithb, Phillip R.

Westmorelandb, Richard J. Farrisa, E. Bryan Coughlina, Todd Emricka,* aDepartment of Polymer Science and Engineering, University of Massachusetts, Governors Drive, Amherst, MA. The extent of lubricant degradation in a sliding elastohydrodynamic contact has been investigated.

The lubricant was subjected to peak Hertz pressures of approximately 10 9 N/m 2 and average shear rates of 10 6 to 10 7 s −arbon lubricants, bulk polymers and polymer containing hydrocarbon solutions were examined. Fluid Effects in Polymers and Polymeric Composites, written by the late Dr.

Jack Weitsman, addresses the wide range of parameters that affect the interaction of fluids with polymers and polymeric book aims at broadening the scope of available data, mostly limited up to this time to weight-gain recordings of fluid ingress into polymers and composites, to the practical.

the effects of polymer degradation on flow properties of fluids and lubricants containing polymers: sae as aerospace fluid power - contamination classification for hydraulic fluids: mil prf c: hydraulic fluid, fire resistant, low temperature, synthetic hydrocarbon base, aircraft and missile: astm d redline.

Degradation of composite-matrix polymers will more likely be due to thermal instability and the accelerating effects of oxidative attack. Polymer degradation in an inert atmosphere is the result of the breaking of covalent bonds in the polymer network.

The degradation process of the polymer additive while it passes through the contact is described by a kinetic equation. The kinetic equation is solved along the lubricant flow streamlines. The solution of the kinetic equation predicts the density of the probabilistic distribution of the polymer molecular weight versus polymer molecule chain length.

The effects of polymer addition, electrolyte, clay type and antioxidant on the rheological properties of Driscal-D solution were studied in high-temperature environments.

Aqueous polymer solutions in elongational flow have numerous applications in different industries, such as extraction of oil by polymer flooding, polymer melt extrusions, fiber spinning, lubricants, and film blowing.

Chemical degradation of PAM that leads to chain scission involves activation of the polymer by free radicals, 42,62,63,64,65,66 most commonly hydroxyl radicals generated in the environment from. Polymer degradation is a change in the properties tensile strength, colour, shape, etc.

Polymer-based product under the influence of one or more environmental factors such as heat, light or chemicals such as acids, alkalis and some salts. These changes are usually undesirable, such as cracking and chemical disintegration of products.

Molecular weight and crystallinity are key properties of polymers that affect the biodegradation efficiency of microorganisms. The enzymes responsible for polymer degradation are categorized into two groups, i.e., extracellular depolymerase and intracellular depolymerase (Gu ).

Exoenzymes are generally involved in the degradation of complex. CiteScore: ℹ CiteScore: CiteScore measures the average citations received per peer-reviewed document published in this title. CiteScore values are based on citation counts in a range of four years (e.g.

) to peer-reviewed documents (articles, reviews, conference papers, data papers and book chapters) published in the same four calendar years, divided by the number of. Polymer degradation is a change in the properties—tensile strength, color, shape, etc.—of a polymer or polymer-based product under the influence of one or more environmental factors such as heat, light or chemicals such as acids, alkalis and some changes are usually undesirable, such as cracking and chemical disintegration of products or, more rarely, desirable, as in.

The major polymer types are polyethylene, polypropylene,and polyvinyl chloride, with natural rubber and biodegradable polymers becoming increasingly more important. The most important additives are those that are biologically active, because to be effective such chemicals often have properties that make them resistant to photo-degradation and.

The scientific definition of oxidative degradation is the reaction of oxygen (in air) with the fluid by a free radical mechanism to form larger molecules which end up as polymers or solids.

These thicken the fluid thereby increasing its viscosity. Polymer degradation is a change in the properties (tensile strength, color, shape, etc) of a polymer or polymer-based product under the influence of one or more environmental factors such as heat, light or chemicals such as acids, alkali and some salts.

These changes are usually undesirable, such as cracking and chemical disintegration of products or, more rarely, desirable, as in bio. Thermal degradation of polymers is ‘molecular deterioration as a result of overheating’.

At high temperatures the components of the long chain backbone of the polymer can begin to separate (molecular scission) and react with one another to change the properties of the polymer. It is part.

polymer-containing fluids resulting from polymer degradation in the high shear nozzle device. Thermal or oxidative effects are minimized. 1 This test method is under the jurisdiction of ASTM Committee D02 on This test method is used for quality control purposes by Petroleum Products and Lubricants and is the direct responsibility of.

The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications.Thermal degradation of polymers refers to deterioration of polymeric molecules as a result of overheating.

At high temperatures, the components of the long chain backbone of the polymer can break (chain scission) and react with one another to change the properties of the polymer.

Thermal degradation can present an upper limit to the service temperature of plastics as much as the .When polymers flow under a large amount of shear, mechanical degradation can occur, breaking the bonds, reducing the molecular weight, and therefore reducing the viscosity. The goal of this study is to perform computational fluid dynamics modeling in injection choke valves to measure the amount of simple and extensional shear on the polymers at.