Download or read book Surface Modification of Ultra High Molecular Weight Polyethylene and Vectran Fibers by Pulsed Ultraviolet Excimer Laser written by Jingfeng Zeng and published by . This book was released on 2005 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Modification of Ultra High Strength Polyethylene Fibers by Ultraviolet Excimer Laser Radiation written by Qi Song and published by . This book was released on 1997 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Polymer Fibres written by P. R. Lewis and published by iSmithers Rapra Publishing. This book was released on 1999 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Lewis reviews the theory development and uses of high performance polymer fibres. He describes their manufacture, and compares the properties of different polymers. Applications of different materials are described, together with their advantages and limitations. His review is complemented by the addition of a fully indexed set of references and abstracts selected from the Polymer Library database. These provide further reading on the technology and uses of high performance polymers.
Download or read book Plasma Modification of Polyolefins written by N. S. Baneesh and published by Springer Nature. This book was released on 2021-11-22 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses plasma modification of polyolefin surfaces. It comprises 21 chapters divided into three major sections. The first section covers the different techniques used for plasma modification of polyolefin surfaces and the effects of various gases as a surrounding medium, while the second provides a detailed analysis of the physics and chemistry of plasma modification and discusses various innovative characterization techniques, as well as ageing of the modified surface. It focuses on the analysis of changes in polymers’ surface chemistry using various spectroscopic techniques, and of changes in their surface morphology after plasma treatment using optical microscopy, electron microscopy and atomic force microscopy. In addition, it provides detailed information on the characterization of modified polymer surfaces. The book’s third and last section covers a range of applications of plasma-modified polyolefin surfaces varying from the packaging industry to the biomedical field, and shares valuable insights on the lifecycle analysis of plasma modification and modified surfaces.
Download or read book Oxidation of Polyethylene A Comparison of Plasma and Ultraviolet Ozone Processing Techniques written by and published by . This book was released on 2009 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma and ultraviolet (UV) ozone treatments were compared as methods to functionalize ultrahigh molecular weight polyethylene films in order to make them more compatible with materials or reactive for subsequent surface chemistry. Oxidation states and atomic compositions were determined using x-ray photoelectron spectroscopy, while surface energy and bond stability were probed with contact angle goniometry. Both modification techniques increased the surface energy of the polymer, and the bonds formed were found to be stable over a period of 30 days. Plasma treatment times were much shorter than UV ozone; thus, plasma was determined to be a more efficient surface modification technique.
Download or read book The Adhesion of Ion Beam Irradiated Ultra high Molecular Weight Polyethylene Fibers to Epoxy Matrices written by Richard L. q (Richard Lee) Schalek and published by . This book was released on 1992 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High speed Spinning of Ultra high Molecular Weight Polyethylene Fibres written by Mees Roukema and published by . This book was released on 1991 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spinning and Drawing Properties of Ultrahigh molecular weight Polyethylene Fibers Prepared at Varying Concentrations and Temperatures written by Kan-nan Chen and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Modification of Polymer Films by Excimer Lasers written by H. Niino and published by . This book was released on 1989 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Radiation Surface Treatment of Polymers written by Alekh S. Bhurke and published by . This book was released on 2003 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Modification of Ultra high Modulus Polyethylene Fibers and Their Characterization by Diffuse Transmittance Spectroscopy written by Ahmed Taboudoucht and published by . This book was released on 1989 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resolution of Crystalline Phases in Polymorphic Gel spun Ultra high Molecular Weight Polyethylene Fibers Using Restrained Differential Scanning Calorimetry and X ray Diffraction written by Amos Wampler and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterizing highly oriented ultra-high molecular weight polyethylene (UHMWPE) fibers can present a challenge at or near melt temperatures. The fibers tend to shrink, creating difficulties during testing, both from excessive noise and from the possible alteration of morphology. Perturbations arise during standard differential scanning calorimetry (DSC) and limit the use of an easily accessible laboratory technique. Restraining the fibers during testing, however, suppresses these perturbations and permits the clear determination of melting events as the fiber is subjected to increasing temperatures. This technique is compared to x-ray diffraction (XRD) as a second measure of crystallinity at ambient temperature, removing the concern of shrinking and reorientation during the test.
Download or read book Surface Structuring of Polymer Fibers by UV laser Irradiation written by T. Bahners and published by . This book was released on 1987 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultraviolet Light Surface Treatment of Polymer Composites for Enhancement of Adhesion written by Praveen Tummala and published by . This book was released on 2002 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Modification of Synthetic and Natural Polymers Using Deep UV 172 Nm Irradiation written by Lopamudra Das and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to modify the surfaces of polymers and impart desirable functionalities without affecting the bulk-mediated physical properties is vital for advanced materials development. Photochemical approaches to surface modification are particularly attractive as they minimize the need for use of hazardous materials used in conventional wet chemical technologies, and are relatively faster, efficient and convenient to use. In this research, we undertook a combined experimental and computational approach to understand the effect of deep UV irradiation on a broad range of polymeric materials, and develop a scalable and deployable surface modification strategy that could be extended to all. Four polyesters, polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate(PBT) and polyethylene napthalate (PEN), Kapton polyimide, a polyolefin and cellulose were the polymers investigated. Technical grades of the material were used in order to understand the fundamental science as well as develop a scalable deployable technology. Surface analysis was done using the X-Ray Photoelectron Spectroscopy (XPS), Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS), Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy(ATR-FTIR), Atomic Force Microscopy (AFM) and contact angle measurements. The experiments were carried out using a high intensity 172 nm xenon microplasma lamp, and the effect of varying doses of UV irradiation, 0, 8, 16, and 32 J/cm2 on the polymer surfaces were characterized. The effect of using two different intensity levels was also compared. In case of the polyesters and polyimide, calculated UV/VIS absorption spectra using the ZINDO//B3LYP/321-G method or the AM1/ZINDO approach were used to give an indication of which orbitals were involved in transitions near 172 nm, a valuable tool for predicting future research and development. It was found that 172 nm excimer UV lamp was successful in creating active surface radicals in all the polymers investigated. The AFM results did not indicate any significant surface roughening at 16 J/cm2 total irradiation dose, which was also found to be the radiation level at which a reaction set point was reached in all the polymers. Vapor phase photo-assisted grafting of an alkane and alkene onto to the polyester surfaces indicated a common trend in the surface chemistry changes. To develop a potentially useful low energy surface that would impart anti soil and cleanibility properties, a fluorocarbon was successfully grafted on each material. Water and light mineral oil contact angle measurements confirmed a marked increase in hydrophobicity and oleophobicity, in some cases reaching that close to pure polytetrafluoroethylene. The grafted surface was found to be significantly wash durable. This is a valuable development as the process is minimally hazardous, relatively simple, fast, efficient, economic, and easily scalable and deployable. Particularly in the case of some polymers, such as polyolefins and cellulose, this method bypasses the challenges of complex processing routes and harmful chemicals that are currently used to achieve the same goal.
Download or read book Surface Modification of Polymer Materials Induced by Laser Irradiation written by Rozalina Zakaria and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the surface modification effects using allyl-diglycol CR39 polymer induced by laser irradiation at 157 nm F2 laser (VUV) and 248 nm KrF laser. The motivation is to investigate the ablation effects on this polymer in optical waveguides application the ablation effects on this polymer in optical waveguides. Fabrication of waveguides has been observed using continuous wave (CW) at 244 nm argon ion laser. Ablation effects on the surface of this polymer have been characterized including ablation threshold at different wavelengths from the assorted depth of craters formed from UV pulsed laser. Application of this polymer in optical waveguide application is corroborated by the refractive index value on the CR39 channels that varied as fluences changed when using the continuous wave UV irradiation. A limit for upper fluence at the point where laser ablation originates on this polymer has also been determined.
Download or read book Modification of Polymer Surfaces Using Excimer Lasers written by Stephen Derek Jenkins and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
