Radiation Curing In Polymer Science And Technology Volume Ii

Volume three deals specifically with the role of monomers and resins in radiation curing. The nature of the backbone of ologomers leads to the ultimate physical or chemical properties of the UV-cured material. This chapter also covers aspects of the chemistry of these compounds in relation to their end uses.

Volume one deals primarily with the basic principles of radiation curing: UV-curing; EB-curing; microwave curing; oligomer/resin technology; chemistry of imaging science; testing methods; equipment; coatings applications and emerging trends in photopolymers for holographic recording and laser induced reactions.

The demand for photoinitiators has been steadily increasing since benzoin ethers, latent radical sources activated by UV light, were first industrially employed in particle-board finishing in the 1960s. Among the factors con tributing to the continuing success of photoinitiators are the widespread adoption of dry coatings which eliminate the environmental problems as sociated with solution polymerisation and the development of new printing and resist applications. All of the early commercial photoinitiators were organic compounds, primarily derivatives of benzil or acetophenone. But as research in organo metallic chemistry gained momentum, the potential advantages of organo metallic complexes as photoinitiators became evident. Not only would the use of metal-based compounds allow polymerisation to be initiated by lower energy, and, therefore, more economical visible light but the absorption characteristics and reactivity of these complexes could be fine tuned to fit the specific application requirements by manipulation of the metal ligands. In fact, the recent commercialisation of the first two organo-metallic photoinitiators, a titanocene (see p. 347) and a (cyclopentadienyl)(arene)iron(II) salt (see p. 359), bears testimony to the mounting importance and versatility of metal complexes as latent sources of radicals and/or Lewis acids. The purpose of this chapter is to provide an overview of photopolymerisation with metal species, whether they be metal ions, inorganic or organo-metallic complexes.

The aim of this four-volume, multi-author reference work is to provide a comprehensive guide to the radiation curing field. Volume Two is devoted to the chemistry of photoinitiators, presenting and discussing basic concepts and the reactivity of typical systems.

This report contains a review of the state of the art in photoinitiated polymerisation. The review is divided into two main parts. The first part is devoted to a basic description of the different photoinitiation processes encountered. In the second part photopolymerisation reactions are presented and discussed. This review is published together with an indexed section containing bibliographic references and abstracts to the cited articles.

Volume Four discusses the applications of radiation curing and provides a synopsis of the latest research in coatings; graphic arts; microelectronics; optical fibres; adhesives; 3D machining; membranes and holographic optical elements as well as considering the worldwide trends in the market.

Photoinitiating systems for polymerization reactions are largely encountered in a variety of traditional and high-tech sectors, such as radiation curing, (laser) imaging, (micro)electronics, optics, and medicine. This book extensively covers radical and nonradical photoinitiating systems and is divided into four parts: * Basic principles in photopolymerization reactions * Radical photoinitiating systems * Nonradical photoinitiating systems * Reactivity of the photoinitiating system The four parts present the basic concepts of photopolymerization reactions, review all of the available photoinitiating systems and deliver a thorough description of the encountered mechanisms. A large amount of experimental and theoretical data has been collected herein. This book allows the reader to gain a clear understanding by providing a general discussion of the photochemistry and chemistry involved. The most recent and exciting developments, as well as the promising prospects for new applications, are outlined.

Photoinitiators A comprehensive text that covers everything from the processes and mechanisms to the reactions and industrial applications of photoinitiators Photoinitiators offers a wide-ranging overview of existing photoinitiators and photoinitiating systems and their uses in ever-growing green technologies. The authors—noted experts on the topic—provide a concise review of the backgrounds in photopolymerization and photochemistry, explain the available structures, and examine the excited state properties, involved mechanisms, and structure, reactivity, and efficiency relationships. The text also contains information on the latest developments and trends in the design of novel tailor-made systems. The book explores the role of current systems in existing and emerging processes and applications. Comprehensive in scope, it covers polymerization of thick samples and in-shadow areas, polymerization under LEDs, NIR light induced thermal polymerization, photoinitiators for novel specific and improved properties, and much more. Written by an experienced and internationally renowned team of authors, this important book: Provides detailed information about excited state processes, mechanisms and design of efficient photoinitiator systems Discusses the performance of photoinitiators of polymerization by numerous examples of reactions and application Includes information on industrial applications Presents a review of current developments and challenges Offers an introduction to the background information necessary to understand thefield The role played by photoinitiators in a variety of different polymerization reactions Written for polymer chemists, photochemists, and materials scientists, Photoinitiators will also earn a place in the libraries of photochemists seeking an authoritative, one-stop guide to the processes, mechanisms, and industrial applications of photoinitiators.