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Author :
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (317 download)
Download or read book Microgravity Polymers written by and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (3 download)
Download or read book Microgravity Polymers written by and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. O. Frazier
Publisher :
ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (317 download)
Download or read book Microgravity Studies of Organic and Polymeric Materials written by D. O. Frazier and published by . This book was released on 1994 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Patton Downey
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.3/5 (91 download)
Download or read book Polymer Research in Microgravity written by James Patton Downey and published by . This book was released on 2001 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixteen papers examine how gravity can affect polymerizations and polymer processing and how weightlessness or "microgravity" is achieved. The volume reviews the current research from sounding rocket and orbital investigations, parabolic flight investigations, and ground-based research. Also covered are inorganic to biologically produced polymers, including free-radical polymerization, polymer-dispersed luquid crystals and foams.
Author : David B. Hirsch
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (455 download)
Download or read book Microgravity Effects on Combustion of Polymers written by David B. Hirsch and published by . This book was released on 2000 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: NASA Glenn Research Center conducted a cooperative program with the Russian Space Agency Keldysh Research Center, with technical support provided by NASA Johnson Space Center White Sands Test Facility, to investigate polymer combustion in ventilated microgravity in a small combustion tunnel operated on the orbital station Mir. Reported here are ground test results on flammability characteristics of the test materials for verification of the data and conclusions of the space measurements. It was found that very low forced convective flows can sustain polymer combustion in microgravity. Shutoff of the flow, however, is likely to suppress the combustion, particularly if the fire is in the incipient phase and the oxygen concentration is sufficiently low. Relative flammability rankings obtained in ground tests focusing on limiting oxygen index and cone calorimeter heat-release tests would not apply to microgravity environments if the ranking criterion is the minimum forced-flow velocity required for sustained combustion. Convective flows caused by buoyancy in the ground NASA STD 6001 Test 1 far exceeded the minimum forced convective flows required to sustain microgravity combustion. Results indicate that this test provided conservative results for the materials tested in microgravity by sustaining their combustion in less severe oxygen concentration and total pressure conditions than those in which extinguishment occurred in quiescent microgravity environments.
Author : Alexey Kondyurin
Publisher : Newnes
ISBN 13 : 0080999182
Total Pages : 268 pages
Book Rating : 4.0/5 (89 download)
Download or read book Ion Beam Treatment of Polymers written by Alexey Kondyurin and published by Newnes. This book was released on 2014-09-25 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion Beam Treatment of Polymers, Second Edition presents the results of polymer investigations and technique development in the field of polymer modification by high-energy ion beams. It shows how to use ion beam equipment in the polymer industry, as well as how to use it to produce new polymer materials. The authors, scientists and researchers active in the field, provide analysis and data from their work, and give an overview of related work by others. The authors focus on wetting, adhesion, hardness, chemical activity, environmental stability, biocompatibility, new synthesis methods, and space flight construction. The technologies of material modification by a beam of high energy ions have wide applications in different fields, from microelectronics to medicine. Historically, ion beam treatment of polymers had fewer applications due to high costs of ion beam equipment and low costs of polymer materials. The modern development of new pulse sources with a high current density and wide ion beams increase the effectiveness of ion beam technology for polymers. Collates data from many scientists working in polymer chemistry, physics of ion beam implantation, and in development and production of ion beam equipment Covers industrial and scientific applications of ion beam implanted polymers Integrates physical and chemical aspects of the processes in polymers treated by ion beams
Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (897 download)
Download or read book MICROGRAVITY POLYMERS : PROCEEDINGS OF A WORKSHOP HELD IN CLEVELAND OHIO MAY 9 1985 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1986 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lewis Research Center
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (976 download)
Download or read book Microgravity Polymers written by Lewis Research Center and published by . This book was released on 1986 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jiann C. Yang
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (317 download)
Download or read book Combustion of a Polymer (PMMA) Sphere in Microgravity written by Jiann C. Yang and published by . This book was released on 1999 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The video sequences revealed a number of dynamic events including bubbling and sputtering as well as soot shell formation and break-up during combustion of the spheres at reduced gravity. The ejection of combusting material from the burning spheres represents a fire hazard that must be considered at reduced gravity. The ejection was found to be sensitive to polymer type, but independent of oxygen concentration and pressure. The average value of the ejection frequency was found to be 3 Hz, 5 Hz, and 5 Hz for PMMA, PS, and PP, respectively. The velocities of the ejected material were estimated by tracking the material in two consecutive video frames. For the PP spheres, Va=2.3 (+/-1.2) cm/s (with 60 events observed). The ejected material appeared to decelerate at an average rate of ~40 cm/s2, and traverse an average distance of only 8 mm before burning to completion.
Author : Lei Ye
Publisher : CRC Press
ISBN 13 : 9814310999
Total Pages : 288 pages
Book Rating : 4.8/5 (143 download)
Download or read book Molecular Imprinting written by Lei Ye and published by CRC Press. This book was released on 2013-09-26 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular imprinting is one of the most efficient methods to fabricate functional polymer structures with pre-defined molecular recognition selectivity. Molecularly imprinted polymers (MIPs) have been used as antibody and enzyme mimics in a large number of applications. The outstanding stability and straightforward preparation make MIPs ideal substitutes for biologically derived molecular recognition materials, especially for development of affinity separation systems, chemical sensors and high selectivity catalysts. New MIP materials are being increasingly applied to solve challenging problems in environmental sciences, food safety control, biotechnology and medical diagnostics. Development in molecular imprinting research over the past decade has enabled tailor-designed molecular recognition sites to be created in synthetic materials with physical dimensions in the micro- and nano-regime. The new breakthroughs in MIP synthesis/fabrication have brought in many unprecedented functions of the micro- and nano-structured polymers. The aim of this review volume is to introduce to the readers the new developments in molecularly imprinted micro- and nano-structures, and the new applications that have been made possible with the new generation of imprinted materials.
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781723820632
Total Pages : 50 pages
Book Rating : 4.8/5 (26 download)
Download or read book Combustion of a Polymer (Pmma) Sphere in Microgravity written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-19 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of low gravity, aircraft-based, experiments was conducted to investigate the combustion of supported thermoplastic polymer spheres under varying ambient conditions. The three types of thermoplastic investigated were polymethylmethacrylate (PMMA), polypropylene (PP). and polystyrene (PS). Spheres with diameters ranging from 2 mm to 6.35 mm were tested. The total initial pressure varied from 0.05 MPa to 0. 15 MPa whereas the ambient oxygen concentration varied from 19 % to 30 % (by volume). The ignition system consisted of a pair of retractable energized coils. Two CCD cameras recorded the burning histories of the spheres. The video sequences revealed a number of dynamic events including bubbling and sputtering, as well as soot shell formation and break-up during combustion of the spheres at reduced gravity. The ejection of combusting material from the burning spheres represents a fire hazard that must be considered at reduced gravity. The ejection process was found to be sensitive to polymer type. All average burning rates were measured to increase with initial sphere diameter and oxygen concentration, whereas the initial pressure had little effect. The three thermoplastic types exhibited different burning characteristics. For the same initial conditions, the burning rate of PP was slower than PMMA, whereas the burning rate of PS was comparable to PMMA. The transient diameter of the burning thermoplastic exhibited two distinct periods: an initial period (enduring approximately half of the total burn duration) when the diameter remained approximately constant, and a final period when the square of the diameter linearly decreased with time. A simple homogeneous two-phase model was developed to understand the changing diameter of the burning sphere. Its value is based on a competition between diameter reduction due to mass loss from burning and sputtering, and diameter expansion due to the processes of swelling (density decrease with heating) and bubble growth.
Author : Jean-Paul Pelteret
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110418622
Total Pages : 412 pages
Book Rating : 4.1/5 (14 download)
Download or read book Magneto-Active Polymers written by Jean-Paul Pelteret and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-12-16 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: From fabrication to testing and modeling this monograph covers all aspects on the materials class of magneto active polymers. The focus is on computational modeling of manufacturing processes and material parameters. As other smart materials, these elastomers have the ability to change electrical and mechanical properties upon application of magnetic fields. This allows for novel applications ranging from biomedical engineering to mechatronics.
Author : Amos Nussinovitch
Publisher : Springer Science & Business Media
ISBN 13 : 1441966188
Total Pages : 322 pages
Book Rating : 4.4/5 (419 download)
Download or read book Polymer Macro- and Micro-Gel Beads: Fundamentals and Applications written by Amos Nussinovitch and published by Springer Science & Business Media. This book was released on 2010-09-11 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beads made from Egyptian faience have been excavated from grave deposits (c. 4000–3100 BC), together with beads of glazed steatite (a soft rock) and of se- precious stones such as turquoise, carnelian, quartz, and lapis lazuli. Information on these and many more ancient beads used for ornaments and jewelry, ritual ceremonies, as art artifacts and gifts for amorous women throughout history, and descriptions of the raw materials (e. g. , glass, bone, precious and other stones) and manufacturing technologies used for their production can be located in many references. Many books are devoted to the description of beads that are not of water-soluble polymer origin, techniques for their production, their art, value, and distribution, re?ecting the wealth of information existing in this ?eld of science and art. On the other hand, there are no books fully devoted to the fascinating topic of hydrocolloid (polymeric) beads and their unique applications. A few books c- tain scattered chapters and details on such topics, while emphasizing the possibility of locating fragments of information elsewhere; however, again, there is no book that is solely devoted to hydrocolloid beads and their versatile applications. In the meantime, the use of water-soluble hydrocolloid beads is on the rise in many ?elds, making a book that covers both past and novel applications of such beads, as well as their properties and ways in which to manipulate them, crucial.
Author :
Publisher :
ISBN 13 :
Total Pages : 440 pages
Book Rating : 4.:/5 (3 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.3/5 (91 download)
Download or read book Microgravity Quarterly written by and published by . This book was released on 1995 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Donald L. Wise
Publisher : CRC Press
ISBN 13 : 148226997X
Total Pages : 968 pages
Book Rating : 4.4/5 (822 download)
Download or read book Photonic Polymer Systems written by Donald L. Wise and published by CRC Press. This book was released on 1998-07-10 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Furnishes the necessary background information, methods of characterization, and applications of optic and photonic systems based on polymers. Provides detailed tutorial chapters that offer in-depth explanations of optic and photonic fundamentals and synthesis techniques."
Author :
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (317 download)
Download or read book NASA Laser Light Scattering Advanced Technology Development Workshop--1988 written by and published by . This book was released on 1989 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
