By Jiri George Drobny
The first version of Radiation know-how for Polymers set the normal as a important, time-saving source providing systematic basic information regarding business radiation applied sciences. elevating the bar even additional, Radiation expertise for Polymers, moment Edition explores rising purposes of ultraviolet (UV) and electron beam (EB) radiation to polymer processing, detailing major alterations within the box because the first publication.
Presents very important new processing and engineering facts from chosen advertisement products
Since the e-book of the former variation, many technological advancements have taken position, new purposes and items were built and commercialized, and a few already demonstrated ones were discontinued. This publication updates adjustments, traits, and common matters in radiation expertise. It offers very important, state-of-the-art details to help extra aid of risky natural compounds and poisonous elements within the setting, advance substitute assets of strength, and harness power in either clinical and business applications.
The writer considers novel makes use of of UV/EB expertise in:
- Equipment and instrumentation advancements in car, electronics, and wood-processing industries
- Applications utilized in waterborne coatings and adhesives, movie differences, high-performance coatings, and inkjet technology
- Processing of coatings, paints, inks, and adhesives, in addition to thermoplastics and elastomers in movie, sheet, and other kinds
This reference discusses new makes use of for UV and EB irradiation, the reaction of polymers to irradiation, assessments with regards to dosimetry and radiometry, and comparable defense and hygiene. it's also fortified with new difficulties and labored recommendations, in addition appendices with supplementary details on gear brands, uncooked fabrics providers, and ideas of eco-friendly chemistry and sustainability.
Read or Download Radiation Technology for Polymers, Second Edition PDF
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Additional resources for Radiation Technology for Polymers, Second Edition
Sample text
They transfer a high-frequency alternating voltage through a barrier discharge into the gas, where the excimers are formed. This technology allows the lamps to work in both continuous and pulsating modes. 12 This makes them suitable for heat-sensitive substrates. In addition to the low surface temperature, excimer lamps have the advantage that they start immediately, so they can be switched on and off as needed. There is no need for standby function and for a shutter system, so no movable parts are necessary on the radiation head.
Pulsed curing systems are widely used in the manufacture of medical devices, electronics, semiconductors, and optical fibers. Pulsed xenon lamps can be made in a variety of shapes to fit specific requirements, such as 360° illumination. 6. 2 Lamp Housing The lamp housing has the function to direct and deliver the energy to the substrate or piece being cured. The reflector system contained in the housing reflects the energy generated by the lamp and the way it depends on its design. The older, parabolic reflectors just reflected the energy in flood pattern.
1 A (referred to as abnormal glow) produces emission of strong 185 and 254 nm radiation. 1 to 10 bar and currents up to 10 A. 6 Conventional mercury lamps are essentially sealed quartz tubes with tungsten electrodes at either end and filled with mercury metal and vapor and a starter gas (usually argon). indb 6 5/5/10 5:24:37 PM Review of Radiation Science and Technology 7 Ar → Ar+ + e– Ionization + – Ar + e → Ar* Excitation Ar* Excited state of argon Recombination of the ionized electron with the argon cation produces an electronically excited argon atom, which can energize and subsequently ionize a mercury atom: Ar* + Hg → Hg+ + e– Hg+ + e– → Hg* Hg* Excited state of mercury The electronically excited mercury atom generated by the recombination of the mercury cation with an electron loses its energy radiatively.