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By Jean-Baptiste Donnet

ISBN-10: 0824701720

ISBN-13: 9780824701727

"Third version bargains the most recent details at the structural, floor, mechanical, digital, thermal, and magnetic homes of carbon fibers in addition to their manufacture and business functions from a few of the world's such a lot amazing experts within the box. "

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Current printing (last digit): 10 9 8 7 6 5 4 3 2 1 PRINTED IN THE UNITED STATES OF AMERICA Page iii Preface Carbon fiber, commercially available since the 1960s, has attracted worldwide interest as a high-performance material. With its light weight and excellent engineering properties, in the form of high modulus and high strength fiber materials it was initially developed for aircraft and aerospace use. Despite initially high expectations and the remarkable scientific and technical fertility of the domain where we have seen the introduction of cellulosic, PAN, pitch and mesophase pitch fibers, and more recently vapor grown fibers, each of them initiating an impressive development, the commercial success was not immediate and it experienced successive up and downs.

ComonomersChemical structure1Acrylic acidCH2 = CHCOOH2Methacrylic acidCH2 = C(CH3)COOH3MethacrylateCH2 = CHCOOCH34AcrylamideCH2 = CHCOONH25Itaconic acidCH2 = (COOH)CH2 COOH Page 6 final carbon fiber properties [15]. An increase in the comonomer content reduces the optimum time required for thermoxidative stabilization and improves mechanical properties of the carbon fibers. However, it reduces the yield of carbon fibers [15]. The general understanding based on the results reported by various workers [2830] is that about 25 mol% is the most appropriate content for acidic comonomers.

Figure 5 Temperature for start of exotherm (Ti) as a function of stretch ratio (from ref. 68). Figure 6 Energy of activation for cyclization reaction as a function of stretch ratio (from ref. 68). Page 12 Figure 7 Effect of heat treatment temperature on fiber strength (from ref. 71). 6 × 105) [7273]. * An appropriate molecular weight distribution (MWD). * Minimum molecular defects. * Average angle of orientation of molecular chains should be minimum possible. * Low comonomer content (25%). 2 denier) [7577].

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Carbon fibers by Jean-Baptiste Donnet


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