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The Effects Of The Conditions Of Char Formation On The Physical Properties Of Charred Phenolic Nylon
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Book Synopsis The Effects of the Conditions of Char Formation on the Physical Properties of Charred Phenolic-nylon by :
Download or read book The Effects of the Conditions of Char Formation on the Physical Properties of Charred Phenolic-nylon written by and published by . This book was released on 1972 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 532 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.
Book Synopsis The Effects of Molecular Structure on the Thermochemical Properties of Phenolics and Related Polymers by : John Abel Parker
Download or read book The Effects of Molecular Structure on the Thermochemical Properties of Phenolics and Related Polymers written by John Abel Parker and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phenolic resins and related polymers have been synthesized by established methods to provide different types of char-forming polymers for pyrolysis studies. Certain features of the molecular structure of these polymers which determine the char yield have been characterized. Pyrolysis studies have been carried out under both thermogravimetric conditions and in environments simulating reentry ablation to relate the char yields of these polymers to their molecular structure. It has been possible to account for the char-forming reactions of these phenolic derived resins in terms of a general pyrolysis mechanism for these classes of polymers. An analysis based on this mechanism has been developed which predicts from molecular structure the observed thermogravimetric char yields accurately over a range from 11 to 65 percent yield. This analysis makes it possible to control primary rates of vapor to char production as required for particular heat-shield applications. Composites have been developed from these polymers and have been tested under one-dimensional pyrolysis simulating reentry ablation. Up to applied heating rates of about 25 cal cm−2sec−1, the observed char yields agree quite closely with those obtained in thermogravimetric tests. It is tentatively concluded that the primary char-forming processes with these classes of materials are independent of polymer heating rate over a range of temperature rise rates varying from 2° to 5000° C per minute. With certain composites and at heating rates greater than 25 cal cm−2sec−1 an additional amount of char is formed due to secondary pyrolysis of vapor products within the char matrix induced by high char temperatures. These secondary processes seem to depend on surface temperature, impact pressure, and the chemical nature of the vapor products.
Download or read book NASA Technical Note written by and published by . This book was released on 1968 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements by :
Download or read book Government Reports Announcements written by and published by . This book was released on 1973 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1967 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1973 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermophysical Properties of a Low-density Phenolic-nylon Ablation Material by : W. T. Engelke
Download or read book Thermophysical Properties of a Low-density Phenolic-nylon Ablation Material written by W. T. Engelke and published by . This book was released on 1967 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Cracking of Phenolic-nylon Pyrolysis Products on Passing Through a Heated Char by : George F. Sykes
Download or read book Thermal Cracking of Phenolic-nylon Pyrolysis Products on Passing Through a Heated Char written by George F. Sykes and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pyrolysis products were generated by flash pyrolysis of the heat-shield material in front of the heated char and were analyzed, after passing through the char, by gas chromatography. The change in composition of the pyrolysis products after passing through the char showed that the high molecular weight products cracked to lower molecular weight products, beginning at about '700' C. The low molecular weight products were found to increase with increasing char temperature and, at char temperatures approaching 1000° C, the pyrolysis gases were composed of carbon dioxide, carbon monoxide, water, methane, hydrogen, acetylene, benzene, and cyclopentanone.
Author :Purdue University. Center for Information and Numerical Data Analysis and Synthesis Publisher : ISBN 13 : Total Pages :232 pages Book Rating :4.:/5 (318 download)
Book Synopsis Electronic Properties Research Literature Retrieval Guide, 1972-1976: Mixtures, rocks and minerals, composites and systems, polymers by : Purdue University. Center for Information and Numerical Data Analysis and Synthesis
Download or read book Electronic Properties Research Literature Retrieval Guide, 1972-1976: Mixtures, rocks and minerals, composites and systems, polymers written by Purdue University. Center for Information and Numerical Data Analysis and Synthesis and published by . This book was released on 1979 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analytical Study of Diffusion-controlled Char Oxidation and Its Effect on Steady-state Ablation of Plastic Materials by : Gerald D. Walberg
Download or read book Analytical Study of Diffusion-controlled Char Oxidation and Its Effect on Steady-state Ablation of Plastic Materials written by Gerald D. Walberg and published by . This book was released on 1966 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiofrequency Transmission Characteristics of Several Ablation Materials by : Melvin C. Gilreath
Download or read book Radiofrequency Transmission Characteristics of Several Ablation Materials written by Melvin C. Gilreath and published by . This book was released on 1968 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA Bulletin written by and published by . This book was released on 1964 with total page 2244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Decomposition Characteristics of a Char-forming Phenolic Polymer Used for Ablative Composites by : George F. Sykes
Download or read book Decomposition Characteristics of a Char-forming Phenolic Polymer Used for Ablative Composites written by George F. Sykes and published by . This book was released on 1967 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Evaluation of Ablating Materials in Arc Plasma Jets by : Nevin K. Hiester
Download or read book Comparative Evaluation of Ablating Materials in Arc Plasma Jets written by Nevin K. Hiester and published by . This book was released on 1968 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Protection Materials by : S. D. Williams
Download or read book Thermal Protection Materials written by S. D. Williams and published by . This book was released on 1992 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
