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polymer pyrolysis

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Published: 01 November 1995
Fig. 9 The polymer pyrolysis process of making SiC fibers. Source: Ref 6 More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003063
EISBN: 978-1-62708-200-6
... The SiC fiber obtained via CVD is thick and not very flexible. In the mid-1970s, Japanese researchers produced SiC fibers by controlled pyrolysis of silicon-based polymeric precursors ( Ref 24 , 25 ). Their steps were to: Characterize the polymer (yield, molecular weight, purity, etc.) Melt spin...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003372
EISBN: 978-1-62708-195-5
... Abstract This article focuses on the process methods and matrix chemistries of ceramic-matrix composites. These methods include pressure-assisted densification, chemical vapor infiltration, melt infiltration, polymer infiltration and pyrolysis, and sol-gel processing. The article discusses...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003421
EISBN: 978-1-62708-195-5
... and glass particles. The binder burnout step is thus eliminated because the binder, being of the same composition as the matrix, becomes part of the glass matrix. Polymer Infiltration and Pyrolysis Polymeric precursors can also be used to form a ceramic-matrix in a composite. Because of the generally...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003471
EISBN: 978-1-62708-195-5
... economic value, while others must be disposed of as waste. Pyrolysis Pyrolysis of polymers and their composites involves thermal decomposition of organic materials at high temperature in the absence of oxygen. Typical pyrolysis processes involve melting vessels, blast furnaces, autoclaves, tube...
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Published: 15 June 2020
. Source: Ref 87 . (d) Final ceramic part after pyrolysis. Source: Ref 87 . (e) Polymer-derived ceramics with various shapes printed by the VPP-based process. Source: Ref 87 . (f) Three-dimensional-printed ceramic object with nanolattice. Source: Ref 92 More
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001776
EISBN: 978-1-62708-178-8
... is cumbersome and time-consuming. Another method, pyrolysis GC/MS, is not only more direct and less time-consuming for analyzing the additives but also is useful for identifying the polymer. It is particularly useful for quality control of polymeric materials and for detecting impurities that could lead...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006931
EISBN: 978-1-62708-395-9
... crystal phases and structures in solid materials. failure analysis infrared spectroscopy nuclear magnetic resonance spectroscopy polymer structure thermal analysis X-ray diffraction FAILURE OF POLYMERIC materials is the result of a very complex process. This article introduces procedures...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002451
EISBN: 978-1-62708-194-8
... the recyclate back to the feedstock stage as petroleum products. Selective precipitation brings the recyclate back to the intermediate product stage as polymer resins ( Ref 26 , 27 ). Pyrolysis is the thermal decomposition of organic materials into oil, gas, and solid residue. Energy is required to start...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006939
EISBN: 978-1-62708-395-9
... Abstract Polymer materials are key building blocks of the modern world, commonly used in packaging, automobiles, building materials, electronics, telecommunications, and many other industries. These commercial applications of polymeric materials would not be possible without the use...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003357
EISBN: 978-1-62708-195-5
... to produce SiC-based fibers with small (<20 μm) and large (>50 μm) diameters are polymer pyrolysis and chemical vapor deposition (CVD), respectively. For the polymer route, precursor fibers typically based on polycarbosilane are spun into multifilament tows, which are then cured and pyrolzed to form...
Book Chapter

By Paul J. Walsh
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0009241
EISBN: 978-1-62708-195-5
... to improve the performance/price ratio of carbon fibers. Much of this effort focused on evaluation of various precursors, since carbon fiber can be made from almost anything that yields a quality char upon pyrolysis. Donnet and Bansal ( Ref 5 ) present a good overview of various researchers' efforts...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003013
EISBN: 978-1-62708-200-6
... products. The scrap plastics are ground, usually blended with virgin material, and processed by standard methods into products. The products have performance characteristics equivalent to those of original parts made of virgin plastics. The scrap plastics in primary recycling are usually single-polymer...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001317
EISBN: 978-1-62708-170-2
... in several morphological forms, such as charcoals, carbon blacks, graphite, and molecular sieve structures. Many carbons occur naturally from wood, peat, nuts, shells, and other organic matter. Charcoal, known for its adsorptive properties, is prepared by the pyrolysis of organic polymers. Charcoals...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003487
EISBN: 978-1-62708-195-5
.... The intimate admixture of a poly- thicken or polymerize on heating, and, when experienced personnel. mer with other ingredients, such as llers, used for bonding laminates, require little or no coke. Carbonaceous residue resulting from the softeners, plasticizers, reinforcement, cata- pressure. pyrolysis...
Book

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.9781627081955
EISBN: 978-1-62708-195-5
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003469
EISBN: 978-1-62708-195-5
.... , Temperature Dependence of In Situ Constituent Properties of Polymer Infiltration Pyrolysis Processed Nicalon SiC Fiber-Reinforced SiC Matrix Composite , J. Mater. Res. , Vol 15 ( No. 4 ), 2000 , p 951 – 960 10.1557/JMR.2000.0136 7. Fehlmann K.R. , “Effects of Material Removal Processes...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003441
EISBN: 978-1-62708-195-5
... resin, and the resultant tape is cured with heat and pressure to form a laminate, which is subsequently machined into test specimens. Chemical Tests Surface Characteristics and Polymer Analysis Surface characteristics and polymer analysis can be accomplished with x-ray photoelectron...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006923
EISBN: 978-1-62708-395-9
... Abstract This article discusses the thermal properties of engineering plastics and elastomers with respect to chemical composition, chain configuration, and base polymer conformation as determined by thermal analysis. It describes the processing of base polymers with or without additives...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003848
EISBN: 978-1-62708-183-2
... copolymer. Almost all EPDM polymers use either ethylidene norbornene (ENB) or dicyclopentadiene (DCPD) as the third unconjugated diene monomer. Chloroprene Rubber or Neoprene (CR) Chloroprene rubber or neoprene (CR) results from the polymerization of chloroprene (2-chloro-1,3-butadiene). When...