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thermal analysis

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780115
EISBN: 978-1-62708-281-5
... Abstract This article covers the thermal analysis and thermal properties of engineering plastics with respect to chemical composition, chain configuration, and/or conformation of the base polymers. The thermal analysis techniques covered are differential scanning calorimetry, thermogravimetric...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780089
EISBN: 978-1-62708-281-5
... properties of reactive thermoset systems, while the second utilizes these thermal characteristics as the basis for monitoring and control during processing. thermoset resins chromatography infrared spectroscopy physical test thermal analysis THERMOSETTING RESINS are unique among engineering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780105
EISBN: 978-1-62708-281-5
... and Quality Control of Engineering Thermoplastics by Thermal Analysis ,” Perkin Elmer Corp . 30. “ Standard Test Method for Heats of Fusion and Crystallization of Polymers by Thermal Analysis ,” D 3417, Annual Book of ASTM Standards , American Society for Testing and Materials 31...
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780295
EISBN: 978-1-62708-281-5
... Abstract In an attempt to explain the stresses encountered in the plastics industry, this article first defines the different types of internal stresses in amorphous polymers. Each type of thermal stress is then discussed in detail, with reference to the mechanism of generation and the effect...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.9781627082815
EISBN: 978-1-62708-281-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
... , 153 , 393 , 415 5. Sepe M.P. , Thermal Analysis of Polymers , RAPRA Technology , Shawbury, U.K. , 1997 , p 3 , 4 , 8 , 17 , 19 , 22 , 24 , 33 6. Roy Oberholtzer L.C. , General Design Considerations , Engineering Plastics , Vol 2 , Engineered Materials Handbook...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780383
EISBN: 978-1-62708-281-5
.... Scanning electron microscopes that use a high electric field to remove electrons from a tungsten filament are termed cold-field-emission SEMs or high-resolution SEMs and have the highest resolution capabilities of all SEMs. A compromise is reached in the thermal-field-emission (or Schottky gun) SEM, where...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... Abstract This article discusses the chemical susceptibility of a polymeric material. The discussion covers significant absorption and transportation of an environmental reagent by the polymer; the chemical susceptibility of additives; and thermal degradation, thermal oxidative degradation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780249
EISBN: 978-1-62708-281-5
... in high mechanical hysteresis. Because of their low thermal conductivity, a large portion of the mechanical work done is converted into heat, which complicates the analysis of fatigue data, particularly at high loading frequencies. The traditional approach to fatigue lifetime prediction due to...
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 of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780199
EISBN: 978-1-62708-281-5
... temperature than they are to metals. Two additional influences on the mechanical behavior of polymers are hydrostatic pressure (or the hydrostatic component of the stress) and the aging effect that polymers often undergo at room temperature, depending on their thermal and mechanical history. This article...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780177
EISBN: 978-1-62708-281-5
... 270 212 Coefficient of linear thermal expansion, 10 −5 /K 3.6 3.5 3.8 3.6 D 696 Recommended maximum continuous service temperature for normal parts, °C (°F) 80 (175) 80 (175) 115 (240) 80 (175) … Water absorption, immersed 24 h at 23 °C (73 °F), % 0.3 0.2 0.15 0.15 D 570...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780404
EISBN: 978-1-62708-281-5
... Abstract This article introduces the subject of fractography and how it is used in failure analysis. The discussion covers the structure of and fracture and crack-propagation behavior of polymeric materials, the distinction between the ductile and brittle fracture modes on the basis of...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780055
EISBN: 978-1-62708-281-5
... during the cooling phase, temperature-dependent material data such as specific heat and thermal conductivity are used for the computations. To perform the analysis the injection temperature, mold temperature, ejection temperature, material, and thickness must be chosen. The program uses a one-dimensional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
.... The first section contains articles on the evaluation and characterization of engineering plastics during the stage of design and materials selection. The other sections contain articles on the physical, chemical, thermal, and mechanical characteristics and analysis of plastics. The last section...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
.... Therefore, it is important to understand how polymers and other materials wear. Similar to the wear of metal, polymer wear is affected by several factors that may be broadly divided into three groups: mechanical, environmental, and thermal. These three groups of factors largely decide the mechanism of wear...
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
... hydroperoxides. Oxidation is relatively slow during this photooxidation stage, termed the induction period. Hydroperoxides decompose either thermally or by reaction with light to form alkoxy and hydroxyl radicals. This chain branching ( Fig. 6 ) leads to an autocatalytic increase in the photoinitiation rate and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... deformation or softening of the polymer. Hysteretic heating from deformation can further result in an inaccurate prediction of the cyclic stress amplitude ( Ref 9 ). However, because stresses generally decay in this type of test, thermal failures are rarely encountered ( Ref 5 ). Strain-based tests are...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780276
EISBN: 978-1-62708-281-5
... lubrication. However, polymers also have some inherent tribological limitations, such as significantly low thermal conductivity, dissipativity, and diffusivity, as compared with metals. Frictional heat generated at the sliding contacts cannot be dissipated properly, and hence, flash temperatures at sliding...