Download or read book A Study of Physical Properties of Odpa P PDA Polyimide Films written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-10 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical properties were investigated of ODPA-p-PDA polyimide films, including their lower molecular weight versions with phthalimide endcaps. Free volume, determined by low energy positron annihilation in the test films, was the major parameter of interest since all other physical properties are ostensibly related to it. It affects the dielectric constant as well as the saturation moisture pickup of the test films. An empirical relation was developed between the free volume and molecular weight of the test films, comparable to the Mark-Houwink relation between the polymer solution viscosity and the molecular weight. Development of such a relation constitutes a unique achievement since it enables researchers to estimate the molecular weight of an intractable polymer in solid state for the first time. Singh, Jag J. and Eftekhari, Abe and St.clair, Terry L. Langley Research Center NASA-TM-102625, NAS 1.15:102625 RTOP 506-43-21-05...

Download or read book A Study of Physical Properties of ODPA p PDA Polyimide Films written by and published by . This book was released on 1990 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book The Mechanical Properties of Polyimide Films After Exposure to High PH written by and published by . This book was released on 1992 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1991 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron And Positronium Chemistry Proceedings Of The Third International Workshop written by Jerry Y C Jean and published by World Scientific. This book was released on 1990-11-27 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This workshop on the subject of positron and positronium chemistry is the third international conference after those in Blacksburg, Virginia (1979), and in Arlington, Texas (1986). The fields of interests are interdisciplinary, such as radiation chemistry, superconductivity polymer chemistry, biochemistry, quantum chemistry and nuclear chemistry.

Download or read book NASA Technical Paper written by United States. National Aeronautics and Space Administration and published by . This book was released on 1990 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Technical Paper written by and published by . This book was released on 1990 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Free Volume Variation with Molecular Weight of Polymers written by Jag J. Singh and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Performance Polymers Polyimides Based written by Marc Abadie and published by BoD – Books on Demand. This book was released on 2012-12-19 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: The feature of polyimides and other heterocyclic polymers are now well-established and used for long term temperature durability in the range of 250 - 350'C. This book will review synthesis, mechanisms, ultimate properties, physico-chemical properties, processing and applications of such high performance materials needed in advanced technologies. It presents interdisciplinary papers on the state of knowledge of each topic under consideration through a combination of overviews and original unpublished research. The volume contains eleven chapters divided into three sections: Chemistry; Chemical and Physical Properties; and Applications.

Download or read book The Mechanical Stability of Polyimide Films at High PH written by and published by . This book was released on 1990 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polyimides written by A.J. Kirby and published by iSmithers Rapra Publishing. This book was released on 1992 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyimides have been available commercially for over 25 years, but are still frequently thought of as new materials, due largely to their performance and high technology end uses, which ensure that levels of research and development remain high. This detailed review describes the synthesis, properties, processing and applications of condensation, addition and hybrid polyimides. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.

Download or read book An Investigation of Microstructural Characteristics of Contact lens Polymers written by Jag J. Singh and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA Tech Briefs written by and published by . This book was released on 1992 with total page 1486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polyimide for Electronic and Electrical Engineering Applications written by Sombel Diaham and published by BoD – Books on Demand. This book was released on 2021-05-05 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyimide is one of the most efficient polymers in many industries for its excellent thermal, electrical, mechanical, and chemical properties as well as its easy processability. In the electronic and electrical engineering industries, polyimide has widely been used for decades thanks to its very good dielectric and insulating properties at the high electric field and at high temperatures of around 200°C in long term-service. Moreover, polyimide appears essential for the development of new electronic devices where further considerations such as high power density, integration, higher temperature, thermal conduction management, energy storage, reliability, or flexibility are required in order to sustain the growing global electrical energy consumption. This book gathers interdisciplinary chapters on polyimide in various topics through state-of-the-art and original ongoing research.