Good Adhesion Is Required In a Number of Technologies Involving Fluoropolymers Including Adhesive Bonding, Painting, Printing and Metallisation.DUBLIN, Ireland -- Research and Markets (http://www.researchandmarkets.com/reports/c39958) has announced the addition of Adhesion to Fluoropolymers to their offering. Fluorinated fluorinated material to which a fluoride has been added, e.g. water for human consumption treated as a prophylaxis against tooth decay. polymers have a number of very useful properties such as excellent chemical resistance. However, they are usually difficult to bond without a pretreatment pretreatment, n the protocols required before beginning therapy, usually of a diagnostic nature; before treatment. pretreatment estimate, n See predetermination. . There are exceptions and untreated poly(vinylidene fluoride), for example, may be successfully bonded with an amine-cured epoxide epoxide /epox·ide/ (e-pok´sid) an organic compound containing a reactive group resulting from the union of an oxygen atom with two other atoms, usually carbon, that are themselves joined together. . The most effective methods to pretreat pre·treat tr.v. pre·treat·ed, pre·treat·ing, pre·treats To treat (wood or fabric, for example) beforehand. pre·treat fully fluorinated polymers were developed in the 1950s. Much work, especially on electrochemical electrochemical /elec·tro·chem·i·cal/ (-kem´i-k'l) pertaining to interaction or interconversion of chemical and electrical energies. e·lec·tro·chem·i·cal adj. and plasma treatments, has since been carried out but to date these have not proved as effective as the early methods. Partially fluorinated polymers may be treated like polyolefins, for example, flame, and plasma treatments are very effective. Aqueous and alcoholic solutions of Group I hydroxides are also very effective. Fluoropolymers can provide a combination of properties including high temperature resistance, excellent resistance to many chemicals and ultraviolet (UV) radiation, fire resistance and low friction. Fluoropolymers are relatively expensive and they are generally used in specialised applications such as linings for chemical plant, spacecraft coatings that are resistant to atomic oxygen, fire-resistant coatings for cables, and of course, non-stick functions. There are more than twenty different fluoropolymers that are commercially available. Good adhesion is required in a number of technologies involving fluoropolymers including adhesive bonding, painting, printing, metallisation (via vacuum or solution) and composite production. However, fully fluorinated polymers such as PTFE PTFE polytetrafluoroethylene. and FEP See front end processor. are notoriously difficult to adhere to, while partially fluorinated polymers such as PVDF PVDF polyvinylidene difluoride and PVF may cause problems depending on the circumstances. To achieve a satisfactory level of adhesion, it is often necessary to carry out a pretreatment with both fully and partially fluorinated polymers. In this review the principles of adhesion are considered first (Section 2). Techniques that have greatly increased our understanding of adhesion to fluoropolymers are described in Section 3. Cases where good adhesion is achieved without a pretreatment are examined in Section 4. However, as pretreatments are usually needed to get the required level of adhesion, this review is mainly concerned with the wide variety of methods available to pretreat fluoropolymers (Section 5). A general discussion and conclusions follow. This Review Report comprises a concise, expert review, supported by an extensive bibliography compiled from the Abstracts database on the topic of adhesion to fluoropolymers. This bibliography provides additional information on this topical field. This review will be of interest both to those who already use fluoropolymers and those who are considering using them. About the Authors... Dr Derek Brewis brew·is n. New England Bread soaked in liquid, usually milk, and eaten as a pudding or as a side dish with meat. [Middle English brewes, from Old French broez, pl. first became interested in adhesion when he joined the Petrochemical and Polymer Laboratory of ICI (language) ICI - An extensible, interpretated language by Tim Long with syntax similar to C. ICI adds high-level garbage-collected associative data structures, exception handling, sets, regular expressions, and dynamic arrays. in 1964. From 1967 he pursued an academic career but retained an interest in adhesion collaborating with various organisations including ICI, BP and the British Ministry of Defence. He is currently interested in the pre-treatments of plastics, elastomers and metals and has over 100 publications in these areas. Dr Ralf Dahm developed a life-long interest in electrochemistry electrochemistry, science dealing with the relationship between electricity and chemical changes. Of principal interest are the reactions that take place between electrodes and the electrolytes in electric and electrolytic cells (see electrolysis), as well as the after working on the early development of fuel cells for the Apollo project during the early 1960s. He entered academia in 1971 but maintained close links with industry. He is interested in the electrochemical generation of powerful oxidising and reducing agents and in the application of electrochemical techniques to the surface pre-treatment of polymers and metals and has collaborated with Dr Brewis for more than three decades. Topics Include: 1 Introduction 2 Principles 3 Methods Used to Study Surfaces 4 Adhesion Without Pretreatment 5 Pretreatments General Discussion Conclusions References Abbreviations and Acronyms Subject Index Company Index For more information visit http://www.researchandmarkets.com/reports/c39958 |
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