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molecular structure

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Published: 01 August 2013
Fig. 8.9 Schematic of the molecular structure of clay. Source: Ref 8.2 More
Image
Published: 30 April 2020
Fig. 3.3 Repeat unit for polyethylene. The central molecular structure unit between the brackets is repeated to form the polymer. More
Image
Published: 01 November 2010
Fig. 15.3 Water attachment to molecular structure. Source: Ref 1 More
Image
Published: 01 July 2009
Fig. 8.1 Molecular structure for the Be 3 (OH) 3 3+ complex. Source: Everest 1964 More
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
... Abstract This chapter describes the molecular structures and chemical reactions associated with the production of thermoset and thermoplastic components. It compares and contrasts the mechanical properties of engineering plastics with those of metals, and explains how fillers and reinforcements...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140005
EISBN: 978-1-62708-264-8
... in water (called the molecular structure) is the same, on average, from point to point in the water. The water is called a liquid phase . Similarly, the molecular structure in ice is the same from point to point in the ice, and the ice is called a solid phase. However, the molecular structures of ice...
Image
Published: 01 December 2008
Fig. 1.2 The structure of a macromolecule corresponds to the internal structure of a metal or ceramic, if a primary structure is considered to be analogous to a molecular structure and a higher-order structure to a microstructure. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060155
EISBN: 978-1-62708-355-3
... Abstract Elastomers comprise a subclass of polymers that display the ability to stretch and recover that is typical of a rubber band. This chapter describes the properties determined by tensile testing of elastomers and the factors influencing them, namely, structuring of the molecular matrix...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
... of the material. Unlike metals, polymers have a molecular structure that includes characteristics such as molecular weight, crystallinity, and orientation, and this has a significant impact on the properties of the molded article. Additionally, plastic resins usually contain additives, such as reinforcing fillers...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730099
EISBN: 978-1-62708-283-9
... Abstract This chapter discusses the structural classifications, molecular configuration, degradation, properties, and uses of polymers. It describes thermoplastic and thermosetting polymers, degree of polymerization, branching, cross-linking, and copolymers. It also discusses glass transition...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780343
EISBN: 978-1-62708-281-5
... pertinent to structure analysis. This is followed by a review of the characterization of plastics by infrared and nuclear magnetic resonance spectroscopy. The article then provides information on the distribution of molecular weight of an engineering plastic. It further discusses the methods used in thermal...
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 December 2008
DOI: 10.31399/asm.tb.tm.t52320001
EISBN: 978-1-62708-357-7
... solution. Fig. 1.2 The structure of a macromolecule corresponds to the internal structure of a metal or ceramic, if a primary structure is considered to be analogous to a molecular structure and a higher-order structure to a microstructure. These polymer structures are called primary...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780028
EISBN: 978-1-62708-281-5
... Abstract This article describes in more detail the fundamental building-block level, atomic, then expands to a discussion of molecular considerations, intermolecular structures, and finally supermolecular issues. An explanation of important thermal, mechanical, and physical properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.tm.9781627083577
EISBN: 978-1-62708-357-7
Series: ASM Technical Books
Publisher: ASM International
Published: 31 August 2023
DOI: 10.31399/asm.tb.mdsbktmse.t56070001
EISBN: 978-1-62708-451-2
... laboratory showed that the addition of 0.5 wt% cyclopropane carboxylic acid (CPCa) to a polyalphaolefin (PAO) base oil reduced friction and wear ( Ref 7 ). Reactive MD simulations revealed that CPCa forms a lubricious amorphous carbon structure, or a tribofilm, that reduces friction and wear. Molecular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... of the test; and the molecular properties of the polymer. These factors are of considerable interest and practicality for the safe design of structural polymeric components subjected to repetitive loading. When designing for the fatigue life of an engineering plastic, one of two distinct philosophies...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
... to form a polymer. These variations in structure within the molecule may involve stereoisomerism, branching, molecular weight and distribution, end groups and impurities, and copolymerization. Polymer size is quantified primarily by molecular weight (MW), molecular-weight distribution (MWD), and branching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
.... These chemical alterations of the molecular structure are not necessarily irreversible, as the effects can be reversed if the chemical is removed from the material (for example, by evaporation). Environmental stress cracking also can occur without significant absorption of an environmental reagent by the polymer...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290035
EISBN: 978-1-62708-319-5
... three structure variants. (a) Isotactic, with the side group on only one side. (b) Syndiotactic, with the side group jumping side to side. (c) Atactic, with random side group arrangement Properties vary with these different arrangements, as discussed later in this chapter. The molecular...