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phenolic composites

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Published: 01 December 2003
Fig. 8 Specific wear rates for phenolic resin and its composites. The data are reported for various experimental conditions and pv (pressure × velocity) factors, as reported in the literature. Specimen Sliding speed ( v ), m/s Normal pressure ( p ) Counterface roughness ( R More
Image
Published: 01 June 1983
Figure 4.34 Thermal conductivity of selected polymer specimens from 4 to 300 K ( Childs et al., 1973 ). la — polyethylene-1; lb — polyethylene-2; 2 — polytetrafluoroethylene-1; 3 — G. E. 7031 varnish; 4a — perspex plastic-1; 4b — nylon; 5a — glass-phenolic composite; 5b — glass-epoxy composite More
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Published: 01 December 2003
Fig. 9 Micrograph of the worn surface for a phenolic resin/aramid fiber composite ( Ref 29 ) showing partial coverage of the polymer pin by transfer film More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870063
EISBN: 978-1-62708-314-0
... Thermoset composite matrices include polyesters, vinyl esters, epoxies, bismaleimides, cyanate esters, polyimides, and phenolics ( Table 3.1 ). Epoxies currently are the dominant resins used for low and moderate temperatures (up to 275 °F or 135 °C). Bismaleimides are used primarily in the temperature range...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... the source of fire is removed. Indeed, as a result of their charring characteristics, phenolic composites are used for ablative exhaust nozzles for rockets and as a starting material in the production of carbon-carbon composites. They basically encapsulate themselves in char and therefore do not produce much...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870255
EISBN: 978-1-62708-314-0
... of honeycomb panels and foam cores along with their respective applications and unique attributes. The chapter also discusses the cocuring process and its use in fabricating unitized structures. adhesive bonding composite processing honeycomb structures integral cocured structures SANDWICH...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... compares the specific wear rate of a few formulations of thermoset composites. The relevant micrograph is given in Fig. 9 . It is seen from these results that the wear resistance of phenolic resin increases by almost 2 orders of magnitude when fillers such as carbon and aramid fibers are added...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300301
EISBN: 978-1-62708-323-2
..., and this composition is modified until the desired braking properties are obtained. Clutch facings are often polymer composites somewhat similar to brake materials. Their formulation is often empirical and proprietary. Paper, cloth, and glass-reinforced phenolics are widely used for tribological applications...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290243
EISBN: 978-1-62708-306-5
... of surface preparation techniques for plastics and polymer matrix composites, see Chapter 10 . Characterization of surface treatments for metal and polymer substrates Table 9.1 Characterization of surface treatments for metal and polymer substrates Pretreatment type Possible effects...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780329
EISBN: 978-1-62708-281-5
... stresses all combine to produce changes in the chemical composition of the material. These changes may take the form of polymer molecular weight reduction due to main-chain cleavage, the formation of cross links, or the formation of oxidized and other functional groups. As the chemical composition...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250077
EISBN: 978-1-62708-345-4
... Composite, or laminated thermosets, consist of a fibrous sheet material (paper, cotton fabric, nylon fabric, or glass fabric) that is impregnated or coated with a liquid phenolic resin binder and consolidated under high pressure and temperatures. By stacking and consolidating the unidirectional laminations...
Book Chapter

By M. B. Kasen
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860413
EISBN: 978-1-62708-348-5
... Abstract Composite systems for cryogenic applications are discussed in this chapter. This chapter emphasizes filamentary-reinforced composites because they are the most widely used composite materials. It begins with a discussion on the approach to designing and fabricating with low-pressure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230441
EISBN: 978-1-62708-298-3
..., and the transition temperature of the adhesive must be considered. For example, the CTE of aluminum and its alloys is almost double that of beryllium, while most steels have a value close to that of beryllium. (Values for the three materials will depend on their specific compositions and processing.) Thus, heating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
.... It also includes continuous fiber-reinforced resins (composite materials) as well as the short fiber- and/or particulate-reinforced plastics commonly used for parts and components. Because composites are a subset of engineering plastics, they are addressed in much greater detail in Chapter 8, “Polymer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030067
EISBN: 978-1-62708-349-2
... are recommended. Cut the mount containing the bonded boron fiber composites through the midsection with a thin diamond wafering blade. Polish the specimens using 1 μm polycrystalline diamond suspension. Also, apply ethanol to the phenolic pad or stainless steel mesh surface while polishing. Use a high...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... has a long pot or out-time life; and is nontoxic. Matrices for polymeric composites can be either thermosets or thermoplastics. The most prevalent thermoset resins used for composite matrices are polyesters, vinyl esters, epoxies, bismaleimides, cynate esters, polyimides, and phenolics. A comparison...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... machine. Source: Ref 6 A typical composition consists of 25 percent polyester resin, 25 percent glass fiber, and up to 50 percent filler; however, molding compounds with glass contents as high as 65 percent are also available. Although polyesters dominate the market, vinyl esters, phenolics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400169
EISBN: 978-1-62708-258-7
... is required. The form details the history and chemical composition of the material. Also, the form lists the special instructions that are to be performed once the metallographic specimen is prepared, such as the need to measure grain size or volume fraction of one or more of the constituents. The history...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780259
EISBN: 978-1-62708-281-5
... with the nature of the contacting materials ( Ref 4 ). The characteristics of the contact surfaces begin to play a significant role in friction and wear once boundary lubrication conditions are reached. Friction and Wear Applications for Polymeric Materials Table 1 shows polymers and composites...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
... Abstract This introductory article describes the various aspects of chemical structure and composition that are important to an understanding of polymer properties and their eventual effect on the end-use performance of engineering plastics, namely thermoplastics and thermosets. The most...