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Monday, April 27, 2020 | History

1 edition of Radiation processing for plastics and rubber found in the catalog.

Radiation processing for plastics and rubber

Radiation processing for plastics and rubber

international conference : 15 to 17 June 1981 : Bedford Hotel, Brighton, Sussex.

by

  • 221 Want to read
  • 37 Currently reading

Published by The Plastic and Rubber Institute in London (11 Hobart Place, SW1W 0HL) .
Written in English

    Subjects:
  • Plastics -- Congresses.,
  • Ionizing radiation -- Congresses.,
  • Rubber -- Congresses.,
  • Ionizing radiation -- Congresses.

  • Edition Notes

    Cover title.

    ContributionsPlastics and Rubber Institute.
    Classifications
    LC ClassificationsTP1105, TS1871
    The Physical Object
    Pagination278p. in various pagings :
    Number of Pages278
    ID Numbers
    Open LibraryOL18948407M

    The advantage of plastic-like materials is that they produce far less "secondary radiation" than heavier materials like aluminum or lead. Secondary radiation comes from the shielding material itself. When particles of space radiation smash into atoms within the shield, they trigger tiny nuclear reactions. The advantages of food irradiation (process the safety and quality of food through radiation processing in many plastics and rubber is essentially a curing process that modifies the. Abstract: Radiation processing involves the use of natural or manmade sources of high energy radiation on an industrial scale. The principle of radiation processing is the ability of high energy radiation to produce reactive cations, anions and free radicals in materials. The industrial applications of the radiation processing of plastics.


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Radiation processing for plastics and rubber Download PDF EPUB FB2

The resulting book is a valuable guide for a wide range of plastics engineers employing ionizing radiation for polymer treatment in a range of sectors including packaging, aerospace, defense, medical devices and energy applications. Radiation resistant polymers Format: Hardcover.

Radiation processing is widely employed in plastics engineering to enhance the physical properties of polymers, such as chemical resistance, surface properties, mechanical and thermal properties, particle size reduction, melt properties, material compatibility, fire retardation, cturer: William Andrew.

Radiation Processing of Natural Rubber with Vinyl Plastics Chantara Thevy Ratnam, Zurina Mohamad and Mohammad Khalid Siddiqui Radiation processing is a very convenient tool for imparting desirable effects in polymeric materials for a variety of by: 2.

Radiation processing is widely employed in plastics engineering to enhance the physical properties of polymers, such as chemical resistance, surface properties, mechanical and thermal properties, particle size reduction, melt properties, material compatibility, fire retardation, etc.

Drobny introduces readers to the science of ionizing radiation and its. This is a vital resource for plastics engineers, product designers, and R&D professionals, working on products or parts for radioactive environments, as well as engineers and scientists in the medical, nuclear, and radiation processing industries.

The book also supports researchers and scientists in plastics engineering, polymer processing and properties, polymer and coatings chemistry, materials science, and Edition: 1.

The Effects of Radiation Steriliza tion on Plastics DAVID W. PLESTER,PH.D., A.R.I.C. Plastics Division Imperial Chemical Industries London, England I NTRO D U CTI 0 N THERE ARE many different kinds of atomic radiations, but they may be classified into two basic groups: neutral particle radiation and charged particle Size: 1MB.

Radiation resistance depends on polymer formulation as well as on the conditions of radiation exposure, such as the environmental atmosphere, temperature, dose rate, mechan-ical stress, etc.

The most effective factor is the oxidation induced by radiation. Radiation resistance is indicated in two categories, with and without oxidation, together withFile Size: KB.

• Radiation crosslinking forthe production of heat shrinkproducts would continue to grow • Since radiation crosslinked PE has better insulator properties, this would also remain a growth area • Radiation processing has enabled the plastics industryto expand the scope oftheir markets • Continuing R&D should further expand the use ofFile Size: 89KB.

Course -Module 4 -Radiation Damage to Materials Module 4 RADiATiON DAMAGE TO plastics or rubber (natural and synthetic) contain almost exclusively covalent bonding and, therefore, suffersignificantdamage by ionizingradiation. experience a production ofgases during the process ofneutron capture and radioactive decay.

Fission, which. Radiation processing is widely employed in plastics engineering to enhance the physical properties of polymers, such as chemical resistance, surface properties, mechanical and thermal properties, particle size reduction, melt properties, material compatibility, fire retardation, etc.

Drobny introduces readers to the science of ionizing radiation Reviews: 1. Controlling of Degradation Effects in Radiation Processing of Polymers, covering the years This technical publication compiles the most important results and achievements of the participating centers and laboratories during the course of.

This chapter deals with the basic principles of radiation processing, types of radiation used, radiation chemistry, comparison of chemical processing and radiation processing, and the industrial applications of gamma rays and electron beams in the modification and enhancement of polymer properties.

Manufacturing Process. Print setup: Print preparation software is used for orienting and laying out models within a printer’s build volume, adding support structures (if needed), and slicing the supported model into layers.

Printing: The printing process depends on the type of 3D printing technology: fused deposition modeling (FDM) melts a plastic filament, stereolithography. PHYSICAL AND FUNCTIONAL TEST METHODS FOR PLASTICS MATERIAL EVALUATION FIGURE A RELATIVE RADIATION STABILITY OF MEDICAL POLYMER “FAMILIES” Source: International Atomic Energy Agency.

Guidelines for industrial radiation sterilization of disposable medical products. Co gamma irradiation. TEC DOC Vienna IAEA, File Size: KB. The recycling process for butyl rubber materials in turn comprises several steps: cutting of scrap into pieces, cryogenic grinding at liquid nitrogen temperature to produce particulate, e-beam irradiation of the crumb, mixing with the virgin rubber resin (butyl or EPDM Cited by:   Radiation processing is widely employed in plastics engineering to enhance the physical properties of polymers, such as chemical resistance, surface properties, mechanical and thermal properties, particle size reduction, melt properties, material compatibility, fire retardation, etc.

Drobny introduces readers to the science of ionizing radiation and its effects on polymers, Author: Jiri George Drobny. Radiation resistant plastics Depending on the application, plastics can come into contact with different types of radiation, which under certain circumstances can have radiation effects on polymers.

The spectrum of electromagnetic radiation ranges from radio waves, with a longer wavelength, through normal day light, with its short wavelength UV. Vulcanisation is the process by which rubber is changed from essentially a plastic material to either an elastic or a hard material (Stelescu et al., ).

In this process, an elastomer is transformed from a ‘plastic’, ‘formable’ material into an ‘elastic’ material by the formation of a three-dimensional network with different Cited by: advantages.

The major challenge of every radiation processing application where macromolecules are involved is the inhibition of unwanted material property changes which often occur when materials are irradiated and to predict useful lifetimes.

Stability and stabilization of polymers under irradiation environments thus has become a key issue in the. Injection molding is one of the main methods by which parts are manufactured from plastic. The first step in the injection molding process is to feed plastic pellets into the hopper, which then feeds the pellets into the barrel.

The barrel is heated and contains a reciprocating screw or a ram injector. A reciprocating. 1 Material Properties of Plastics Formation and Structure The basic structure of plastics (or polymers) is given by macromolecule chains, formulated from monomer units by chemical reactions.

Typical reactions for chain assembling are polyaddition (continuous or step wise) and condensation polymer-ization (polycondensation) [1] (Figure ). plastics specialists. The book covers each topic in a single page to provide a basic reference to each topic. This space constraint means that each topic is only covered to a basic level.

Detailed plastic product design will always require detailed knowledge of the application, the processing method and the selected g: Radiation processing. This book will review synthesis, mechanisms, ultimate properties, physico-chemical properties, processing and applications of such high performance materials needed in advanced technologies.

Topics covered includes: Polyimides Based on Diaminotriphenylmethane, BPDA-PDA Polyimide, Chemical and Physical Properties of Polyimides, Controlling. Radiation Processing of Polymers for Medical and Pharmaceutical Applications Article (PDF Available) in Macromolecular Symposia (1).

Abstract: Radiation processing involves the use of natural or manmade sources of high energy radiation on an industrial scale.

The principle of radiation processing is the ability of high energy radiation to produce reactive cations, anions and free radicals in materials.

The industrial applications of the radiation processing of plasticsFile Size: KB. 1 Basic Concepts of Radiation Processing 1 Radiation Sources 1 γ-Ray 2 Electron Beam 6 X-Ray 11 Radiation Chemistry of Polymers 15 Interactions of Ionizing Radiation with Polymers and Reactions Induced 15 Different Responses to Radiation from Different Polymers Degradation of Plastics and Polymers D.

Hourston Department of Materials, Loughborough University, UK This article is a revision of the Third Edition article by J. Brysdon, volume 2, pp –, Elsevier B.V. Introduction Definition of ‘Plastics’ The Chemical Nature of Plastics File Size: KB.

Radiation Processing Radiation takes the form of either electromagnetic waves or particles, that travel at or near the speed of light respectively. Radiation processing utilizes radiation energy to treat a material that can be in the form of gas, liquid or solid.

Radiation treatment is a. Rubber Processing and Products •Many of the production methods used for plastics are also applicable to rubbers •However, rubber processing technology is different in certain respects, and the rubber industry is largely separate from the plastics industry •The rubber industry and goods made of rubber are dominated by one product: tiresFile Size: KB.

Industries in the Plastics and Rubber Products Manufacturing subsector make goods by processing plastics materials and raw rubber. The core technology employed by establishments in this subsector is that of plastics or rubber product production. Plastics and rubber are combined in the same subsector because plastics are increasingly being used Missing: Radiation processing.

Electron beam curing of EPDM The radiation chemistry of polymers dates back to the end of the s (refs. In those days polyethylene and other macromolecular materials were exposed to the background radiation (radiation produced indirectly as a result of reactions between the original radiation and its environment) of nuclear reactors.

Ionizing radiation sterilization generally involves irradiation with either gamma rays or high energy electrons.

Ionizing radiation affects every polymer's physical and chemical properties but some plastic materials are more resistant than others to degradation from radiation. between rubber macromolecules (such as sulphur, peroxides, metal oxides, resins, quinones and others), which can react with appropriate functional rubber groups in the process of vulcanization to create transverse bonds between them.

The cross-linking can be induced also by radiation, however its energy must be sufficient toFile Size: 1MB. Extrusion Dies for Plastics and Rubber Design and Engineering Computations Book ISBN: eBook ISBN: No part of this book may be reproduced or transmitted in any form or by any means, electronic Head of the Institute of Plastics Processing (IKV) at RWTH Aachen University, Aachen, GermanyFile Size: KB.

Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing.

Radiation Physics and Chemistry aims to publish articles with. Free Online Library: Electron beam processing of elastomers. by "Rubber World"; Business Chemicals, plastics and rubber. Printer Friendly. 34, articles and books.

Electron beam processing of elastomers. Link/Page Citation * the electron beam radiation process is practically free of waste products and therefore is not a serious. M olecular degradation is a leading cause of plastic component failure, with a study indicating that 17% of plastic failures are associated with a degradation mechanism.

1 In generic terms, molecular degradation of a plastic is the deleterious alteration of the molecular structure within the polymer as the result of a chemical reaction. PROCESSING (A version of this was published as a book chapter in Plastics Technician’s Toolbox, Volume 2, PagesSPE ) John Vlachopoulos and David Strutt Heat transfer is a branch of engineering science which seeks to determine the rate of energy transfer between bodies as a result of temperature Size: KB.

Gamma radiation resistance characterizes the ability of polymers. to withstand sterilization methods. Radiation resistance is characterized by the half value dose of significant changes in mechanical properties such as elongation at break, flexural strength at break etc.

of thermoplastics, elastomers, all aromatic polymers, as well as composite. Abstract. Review on application of radiation for processing of polymers is presented.

The radiation sources like gamma irradiators, electron accelerators and accelerator-based e − /X systems are shortly discussed. Then, the basic information regarding physical and chemical processes undergoing in the irradiated polymers is : Andrzej G.

Chmielewski. In book: Radiation Processing Technology Applications, Chapter: Chapter 30 "Application of radiation processing in the area of rubber industries Author: Radhashyam Giri.UV attack by sunlight can be ameliorated or prevented by adding anti-UV polymer stabilizers, usually prior to shaping the product by injection moulding.

UV stabilizers in plastics usually act by absorbing the UV radiation preferentially, and dissipating the energy as low-level heat. The chemicals used are similar to those in sunscreen products, which protect skin from UV attack.Global production of plastics has grown 20 fold from 15 million metric tons (Mt) in to Mt in (Plastics Europe, ), with plastics becoming ubiquitous across almost all facets of the economy.

With its ever-expanding applications, plastics have delivered many benefits for society. Plastic packaged food lasts longer, reducing g: Radiation processing.