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molecular weight

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870031
EISBN: 978-1-62708-314-0
... Abstract This chapter discusses the properties and processing characteristics of glass, aramid, carbon, and ultra-high molecular weight polyethylene fibers and related product forms, including woven fabrics, prepreg, and reinforced mats. It also includes a review of fiber terminology as well as...
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
... (UV) resistance of most, though not all, engineering plastics, and the resulting requirement of a UV absorber. Polymeric plastics are classified as either thermosets or thermoplastics ( Fig. 7.1 ). Thermosets are low-molecular-weight, low-viscosity monomers (≈2000 cps) that are converted during...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.9781627082815
EISBN: 978-1-62708-281-5
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
... matrices for advanced composites are classified as either thermosets or thermoplastics. Thermosets are low molecular weight, low viscosity monomers (≈2000 centipoise) that are converted during curing into three-dimensional crosslinked structures that are infusible and insoluble. Crosslinking ( Fig. 3.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
.... Ultraviolet radiation is the band of light from 300 to about 4000 Å. It can cause degradation through molecular weight change and crosslinking in the resin system. However, this damage is generally limited to darkening of the resin at the surface layer. Aramid fiber, in particular, is subject to UV...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140005
EISBN: 978-1-62708-264-8
... freezing temperature of 0 °C (32 °F). This effect can be represented graphically, as shown in Fig. 2.1 . Here, temperature is plotted on the vertical axis and the amount of salt dissolved into the water on the horizontal axis. The amount of salt dissolved in the water is given as a weight percent of the...
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
... solid form that possess high tackiness, resulting in bonding when pressure is applied. Formed from various polymers of high molecular weight. Can be single or double sided. Shear strength to 49 MPa (7100 psi), tensile strength to 40 MPa (5800 psi). Applications: solar panels, electronic assemblies...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550621
EISBN: 978-1-62708-307-2
... resistance (hardness) and ductility determine these relationships. The next aspect to consider is the minimum and maximum overall size of the part, often expressed by volume, projected area, or weight. Maximum size often is controlled by equipment considerations. Shape is the next factor to consider. The...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420001
EISBN: 978-1-62708-310-2
... composition is plotted on the horizontal scale, along the base of the diagram, where the weight percentage of copper is read directly, the remainder being nickel. Temperature is read vertically, either from the centigrade scale on the left or from the Fahrenheit scale on the right. Two curves cross the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... variety of plastic joining techniques are available as outlined in Fig. 10.4 . Fig. 10.4 Classification of different plastic joining processes. Source: Ref 10.2 Plastic parts can be broadly classified as either thermosets or thermoplastics. Thermosets are low-molecular-weight, low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... molecular weight polyethylene (UHMWPE), such as Spectra. It has a low density with excellent radar transparency and a low dielectric constant. Because of its low density, it exhibits very high specific strength and modulus at room temperature. However, being polyethylene, it cannot withstand temperatures...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420429
EISBN: 978-1-62708-310-2
... fuels for heating and melting. Moisture and liquid metal can react to form molecular hydrogen according to: (Eq B.4) x M + y H 2 O → M x O y + y H 2 where M is the metal, and x and y are stoichiometric coefficients balancing the equation. At the high...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
.... Silicon-carbide-matrix continuous fiber CMCs are designed for applications where high thermal conductivity, low thermal expansion, light weight, and good corrosion and wear resistance are required. Alumina-matrix continuous fiber CMCs are better in applications where a high tolerance to salt corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
..., including lighter weight, the ability to tailor lay-ups for optimum strength and stiffness, improved fatigue strength, corrosion resistance, and, with good design practice, reduced assembly costs due to fewer detail parts and fasteners. The specific strength (strength/density) and specific modulus (modulus...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
... from less than 3 to 50 μm (0.1 to 2 mils). Coating weight (grams per square meter of coated area), rather than coating thickness, has been adopted as the basis for expressing the amount of coating deposited. Three principal types of phosphate coatings are in general use: zinc, iron, and manganese. A...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170003
EISBN: 978-1-62708-297-6
... resulting value of density for an alloy can be obtained from the rule of mixtures. The addition of lithium to aluminum and magnesium is an example of producing light-weight aerospace alloys. All metals have magnetic properties of one type or another. Ferromagnetic materials are those that are strongly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130133
EISBN: 978-1-62708-284-6
... usually larger than atomic or molecular dimensions Segregation —In the casting process, the solidifying front moves away from the surface of the casting as a plane front, and lower-melting-point constituents in the solidifying alloy are driven toward the center. This is called normal segregation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.9781627082617
EISBN: 978-1-62708-261-7