Science

Determination of Additives in Polymers and Rubbers

Author: Thomas Roy Crompton

Publisher: iSmithers Rapra Publishing

ISBN:

Category: Science

Page: 438

View: 371

This book is designed as a practical text for use in the laboratories of the plastic producer and user industries and by others such as universities and institutions who are concerned with problems associated with additives and adventitious impurities in polymers. For example, powerful new analytical tools have been made available to the chemist by a combination of various chromatographic techniques with methods of identifying separated additives and their degradation products by techniques based on infrared and mass spectrometry. In particular supercritical fluid chromatography combined with m.
Technology & Engineering

Plastics Additives

Author: G. Pritchard

Publisher: Springer Science & Business Media

ISBN:

Category: Technology & Engineering

Page: 633

View: 309

Although plastics are extremely successful commercially, they would never reach acceptable performance standards either in properties or processing without the incorporation of additives. With the inclusion of additives, plastics can be used in a variety of areas competing directly with other materials, but there are still many challenges to overcome. Some additives are severely restricted by legislation, others interfere with each other-in short their effectiveness varies with circumstances. Plastics Additives explains these issues in an alphabetical format making them easily accessible to readers, enabling them to find specific information on a specific topic. Each additive is the subject of one or more articles, providing a suffinct account of each given topic. An international group of experts in additive and polymer science, from many world class companies and institutes, explain the recent rapid changes in additive technology. They cover novel additives (scorch inhibitors, compatibilizers, surface-modified particulates etc.), the established varieties (antioxidants, biocides, antistatic agents, nucleating agents, fillers, fibres, impact modifiers, plasticizers) and many others, the articles also consider environmental concerns, interactions between additives and legislative change. With a quick reference guide and introductory articles that provide the non-specialist and newcomer with relevant information, this reference book is essential reading for anyone concerned with plastics and additives.
Technology & Engineering

Indirect Food Additives and Polymers

Author: Victor O. Sheftel

Publisher: CRC Press

ISBN:

Category: Technology & Engineering

Page: 1320

View: 881

Now, more than ever, foods come packaged in containers designed for direct cooking or heating, which often causes the movement of substances - indirect additives - into foods. Because of their unique characteristics, plastics or polymeric materials (PM) have become the most important packaging material for food products. The safety assessment of plastics intended for use in contact with foodstuffs or drinking water continues to present a serious challenge. Indirect Food Additives and Polymers: Migration and Toxicology studies the potential hazards of indirect additives for human health and develops recommendations for their safe manufacture and use. It contains an impressive review of basic regulatory, toxicological, and other scientific information necessary to identify, characterize, measure, and predict the hazards of nearly 2,000 plastic-like materials employed in packaging. The author presents the data underlying federal regulations - previously unavailable a single volume. The entry for each chemical provides: Prime Name Molecular or Structural Formula Molecular Mass Synonyms CAS Number RTECS number Properties Application and Exposure Migration Data Acute Toxicity Repeated Exposure Short-Term Toxicity Long-Term Toxicity Immunotoxicity of Allergenic Effect Reproductive Toxicity Mutagenicity Carcinogenicity Chemobiokinetics Standards Guidelines Regulations Recommendations References International in scope, the Handbook of Indirect Polymeric Additives in Food and Water: Migration and Toxicology offers comprehensive data on the toxic effects of polymeric materials and their ingredients. You will find the most information on plastics and polymeric materials- their migration and toxicology - in this resource.
Science

Polymer Additives

Author: Jiri E. Kresta

Publisher: Springer

ISBN:

Category: Science

Page: 408

View: 668

Ever since the beginning of the plastics and rubber industry, it was realized that useful products could be produced only if cer tain additives were incorporated into polymers. With the help of these additives, when physically dispersed in a polymer matrix, it has been possible to improve stability against thermal, oxidative, UV, hydrolytic and biological degradation, mechanical properties, flammability, cost, and processibility of plastics. The enormous growth of the volume of plastics consumed by modern society, and new application areas for plastics, have created a demand for new, better additives and better understanding of their functions in polymer systems. As a result of these trends there is a need for sharing of information on progress achieved in the area of polymer additives among engineers and scientists of the plastics industry and academia. This book is based on expanded and updated papers originally presented at the International Symposium on Polymer Additives, which was held in Las Vegas, Nevada, and was sponsored by the American Chemical Society, Division of Polymeric Materials Science and Engi neering. The book is divided into five parts which cover advances in various areas of polymer additives. The first part is devoted to the progress in understanding of UV degradation and stabilization of various polymers. Oxidation degradation and stabilization of plastic materials is covered in the second part. New developments in the stabilization of PVC are presented in the third part.
Technology & Engineering

Additives in Polymers

Author: Jan C. J. Bart

Publisher: John Wiley & Sons

ISBN:

Category: Technology & Engineering

Page: 836

View: 117

This industrially relevant resource covers all established and emerging analytical methods for the deformulation of polymeric materials, with emphasis on the non-polymeric components. Each technique is evaluated on its technical and industrial merits. Emphasis is on understanding (principles and characteristics) and industrial applicability. Extensively illustrated throughout with over 200 figures, 400 tables, and 3,000 references.
Technology & Engineering

Additives in Polymers

Author: Alexandr A. Berlin

Publisher: CRC Press

ISBN:

Category: Technology & Engineering

Page: 364

View: 162

Additives are selected depending on the type of polymers to which they will be added or the application for which they will be used. The appropriate selection of additives helps develop value-added plastics with improved durability as well as other advantages. This research book provides a range of modern techniques and new research on the use of additives in a variety of applications. The methods and instrumentation described represent modern analytical techniques useful to researchers, product development specialists, and quality control experts in polymer synthesis and manufacturing. Engineers, polymer scientists, and technicians will find this volume useful in selecting approaches and techniques applicable to characterizing molecular, compositional, rheological, and thermodynamic properties of elastomers and plastics. The informative chapters are the work of researchers at the Department of Polymers and Composite Materials at the prestigious Semenov Institute of Chemical Physics of Russian Academy of Sciences.
Technology & Engineering

Molecular Dynamics of Additives in Polymers

Author: A. L. Kovarski

Publisher: VSP

ISBN:

Category: Technology & Engineering

Page: 276

View: 167

This volume focuses on the dynamical behaviour of low-molecular additives in solid polymer matrixes. It covers: types and models of molecular motion in condensed media; dependence of motional frequency on particle structure and size, temperature, volume and stress; and polymer properties and polymeric structures. Extensive analysis of common regularities of rotational and translational dynamics of molecules introduced into polymers are given. The book also includes experimental techniques for molecular mobility evaluation, and features detailed data on rotational dynamics of additives. It should be of interest to specialists in various fields of polymer physical chemistry and materials science.
Technology & Engineering

Additives for Plastics

Author: Jiri Stepek

Publisher: Springer

ISBN:

Category: Technology & Engineering

Page: 243

View: 578

This book deals with the most important substances used as additives in the plastics industry to improve the properties of polymer-based materials. Each chapter deals with a particular type of additive based on the type's definition, structure, and classification according to main effects on polymeric materials. The mechanism of the additive efficiency and its effects on basic properties of specific polymers are discussed and a survey of its important qualities and practical applications is given. Each chapter is introduced by a theoretical analysis of the practical and technological importance of the ad ditive. The book is mainly intended for students in technical colleges, polytechnics and universities who are studying plastics technology and macromolecular chemistry as part of their general curriculum and for technologists in industry engaged in development, sales, technical service and production functions, and applications of plastics. An elementary knowledge of chemistry, physical chemistry and polymer science at the technical college level is assumed. Prague and Montreal, December 1982 J. Stepek, H. Daoust Table of Contents Introduction .
Science

Polymer Additives

Author: Jiri E. Kresta

Publisher: Springer

ISBN:

Category: Science

Page: 408

View: 1000

Ever since the beginning of the plastics and rubber industry, it was realized that useful products could be produced only if cer tain additives were incorporated into polymers. With the help of these additives, when physically dispersed in a polymer matrix, it has been possible to improve stability against thermal, oxidative, UV, hydrolytic and biological degradation, mechanical properties, flammability, cost, and processibility of plastics. The enormous growth of the volume of plastics consumed by modern society, and new application areas for plastics, have created a demand for new, better additives and better understanding of their functions in polymer systems. As a result of these trends there is a need for sharing of information on progress achieved in the area of polymer additives among engineers and scientists of the plastics industry and academia. This book is based on expanded and updated papers originally presented at the International Symposium on Polymer Additives, which was held in Las Vegas, Nevada, and was sponsored by the American Chemical Society, Division of Polymeric Materials Science and Engi neering. The book is divided into five parts which cover advances in various areas of polymer additives. The first part is devoted to the progress in understanding of UV degradation and stabilization of various polymers. Oxidation degradation and stabilization of plastic materials is covered in the second part. New developments in the stabilization of PVC are presented in the third part.