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Author :
Release : 1996
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Surface Modification of Polymers Using OH Radicals and Energetic Neutrals by :
Download or read book Surface Modification of Polymers Using OH Radicals and Energetic Neutrals written by . This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt:
Author : June Q. Sun
Release : 1996
Genre : Ion bombardment
Kind : eBook
Book Rating : 209/5 ( reviews)
Book Synopsis Surface Modification of Polymers Using OH Radicals and Energetic Neutrals [microform] by : June Q. Sun
Download or read book Surface Modification of Polymers Using OH Radicals and Energetic Neutrals [microform] written by June Q. Sun. This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt: A special vacuum process has been developed for adding functional groups onto polymer surfaces with different reactivities. In this novel technique, polymer surfaces were exposed, in a vacuum chamber, to OH radicals generated by the dissociation of water vapour on hot rhenium wires. Laser-induced fluorescence spectroscopy was used to confirm the existence of the OH radicals in the reactor. It was found by X-ray photoelectron spectroscopy and high resolution electron energy loss spectroscopy that about half a monolayer equivalent of the C-OH group could be generated on a relatively reactive polymer like polystyrene with a 20 seconds exposure at a water pressure of $1\times 10\sp{-3}$ Torr. Further exposure of the polymer leads to the formation of other functional groups like the C-O-C, C=O and COOH on the surface. For surface engineering of more stable polymers, energetic neutrals were used to activate the polymer surfaces. In this process, the hot rhenium wires were used as thermionic emitter for gas phase electron impact ionization. The ions were subsequently accelerated with an electric field, and were then used to generate energetic neutrals by ion-molecule collisions. The energetic neutrals for activating an electrically insulating surface were controlled by the ion formation, ion acceleration, gas pressure (the mean-free path), and the separation between the ionization zone and the sample surface. With a filament temperature of 1600$\sp\circ$C, an accelerating voltage of 50 eV, a water pressure of $1\times 10\sp{-3}$ Torr (collision mean free path being about 5 cm), and an ion drifting distance of 12 cm, about 0.15 monolayer equivalent of the COH were added to teflon and 0.35 to polyethylene in 30 seconds.
Author : K. L. Mittal
Release : 2024-03-01
Genre : Technology & Engineering
Kind : eBook
Book Rating : 016/5 ( reviews)
Book Synopsis Polymer Surface Modification to Enhance Adhesion by : K. L. Mittal
Download or read book Polymer Surface Modification to Enhance Adhesion written by K. L. Mittal. This book was released on 2024-03-01. Available in PDF, EPUB and Kindle. Book excerpt: POLYMER SURFACE MODIFICATION TO ENHANCE ADHESION This unique, comprehensive and groundbreaking book is the first on this important subject. Polymer Surface Modification to Enhance Adhesion comprises 13 chapters and is divided into two parts: Part 1: Energetic Treatments; and Part 2: Chemical Treatments. Topics covered include atmospheric pressure plasma treatment of polymers to enhance adhesion; corona treatment of polymer surfaces to enhance adhesion; flame surface treatment of polymers to enhance adhesion; vacuum UV photo-oxidation of polymer surfaces to enhance adhesion; optimization of adhesion of polymers using photochemical surface modification UV/Ozone surface treatment of polymers to enhance adhesion; adhesion enhancement of polymer surfaces by ion beam treatment; polymer surface modification by charged particles; laser surface modification of polymeric materials; competition in adhesion between polysort and monosort functionalized polyolefinic surfaces; amine-terminated dendritic materials for polymer surface modification; arginine-glycine-aspartic acid (RGD) modification of polymer surfaces; and adhesion promoters for polymer surfaces. Audience The book will be of great interest to polymer scientists, surface scientists, adhesionists, materials scientists, plastics engineers, and to those involved in adhesive bonding, packaging, printing, painting, metallization, biological adhesion, biomedical devices, and polymer composites.
Author : K. L. Mittal
Release : 2009-02-28
Genre : Technology & Engineering
Kind : eBook
Book Rating : 908/5 ( reviews)
Book Synopsis Polymer Surface Modification by : K. L. Mittal
Download or read book Polymer Surface Modification written by K. L. Mittal. This book was released on 2009-02-28. Available in PDF, EPUB and Kindle. Book excerpt: The topic of polymer surface modification is of tremendous contemporary interest because of its critical importance in many and varied technological applications where polymers are used. Currently there is brisk research activity in unraveling the mechanisms of surface modification and finding ways to prolong the life of surface treatment. Also there is acute interest and need to devise new, improved and economical means to modify polymer surfaces. This book is divided into three parts as follows: Part 1: Surface Modification Techniques; Part 2: Interfacial Aspects and Adhesion; Part 3: General Papers. The topics covered include: various techniques for surface modification including plasma (both vacuum and atmospheric pressure), ozone, photografting, UV photo-oxidation, laser, use of charged particles and others for a variety of polymers; longevity of surface treatment; hydrophobic recovery; fabrication of high-density polymer nano-dots; immobilization of organometallic catalysts on textile carrier materials; polymer membrane antifouling properties; electroless metallization of polymers; effects of surface modification on interfacial shear strength of composites, cord/rubber adhesion, adhesion of UV-curable coatings and attachment of hyperbranched polymers; plasma polymerization; block copolymers; application of plasma technology in decontamination of heat-sensitive polymer surfaces. In essence this book reflects the current state-of-the-knowledge in the arena and represents the work of many renowned scientists and technologists. It should be of interest to anyone with a desire or need to learn the latest R&D activity in this domain and the information contained here should be very valuable in deciding the optimum surface modification technique for his/her particular requirements.
Author : Kash L. Mittal
Release : 2004-08-26
Genre : Science
Kind : eBook
Book Rating : 03X/5 ( reviews)
Book Synopsis Polymer Surface Modification: Relevance to Adhesion by : Kash L. Mittal
Download or read book Polymer Surface Modification: Relevance to Adhesion written by Kash L. Mittal. This book was released on 2004-08-26. Available in PDF, EPUB and Kindle. Book excerpt: This book documents the proceedings of the Fourth International Symposium on Polymer Surface Modification: Relevance to Adhesion held under the auspices of MST Conferences, LLC in Orlando, FL, June 9-11, 2003. Polymers are used for a variety of purposes in a host of technological applications and even a cursory look at the literature will evince that currently there is tremendous interest and R&D activity in the area of polymer surface modification to attain their desired surface characteristics, particularly to enhance their adhesion. This volume contains a total of 25 papers which were properly peer reviewed, revised and edited. So this book is not merely a collection of papers, rather represents the highest standard of publication. The book is divided into three parts: 1. Plasma Surface Modification Techniques; 2. Other / Miscellaneous Surface Modification Techniques; and 3. General Papers. The topics covered include: low pressure plasma surface modification of a variety of polymers using various gases; atmospheric pressure plasma treatment; improvement of stain release properties of fabrics; modification of electrostatic properties of polymers; photon-based processes for surface modification of fibers; excimer UV light treatment; excimer laser surface treatment; low-energy ion treatment; photo-grafting and photo-curing; metallization of treated polymers; chemical (wet) functionalization of polymers; adhesion of paints to thermoplastic substrates; polymer release surfaces; nanolithography in polymer films; gas barrier properties of ceramic layers on polymers; and modification of interphase layer and relevance to adhesion. This volume and its predecessors containing plentiful information should serve as a comprehensive source of latest R&D activity in the highly technologically important arena of polymer surface modification. Anyone interested –centrally or peripherally– in knowing or learning about the various ways to modify polymer surfaces should find this book of immense value.
