1-18 of 18 Search Results for

rheological analysis

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006849
EISBN: 978-1-62708-395-9
... scales (design and diameter of the indenting probe) of imposed weight, and delayed hardness reading (Rockwell specifies a fixed time), as well as critical minimum thickness. Rheological Properties Melt flow analysis may be automated (capillary rheometer, ASTM D3835-16, Ref 7 ) or manual...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006930
EISBN: 978-1-62708-395-9
... Abstract Rheology is defined as the study of the flow and deformation of matter. This article begins with an examination of flow behavior. It describes the geometries and methods employed for rheological testing of polymers in their molten state. It also discusses materials...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006924
EISBN: 978-1-62708-395-9
..., and rheological (viscoelastic) measurements. The four common thermal analysis methods include differential scanning calorimetry, thermomechanical analysis, thermogravimetric analysis, and dynamic mechanical analysis ( Ref 7 ). Thermal analysis comprises a group of analytical techniques that measure...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
... to the conventional injection molding approach, the scientific injection molding approach is a data-driven, systematic approach to developing a robust process by focusing on process physics, polymer chemistry, and rheological properties of the material. Product failures are minimized due to improved efficiencies...
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
... Abstract This article presents tools, techniques, and procedures that engineers and material scientists can use to investigate plastic part failures. It also provides a brief survey of polymer systems and the key properties that need to be measured during failure analysis. It describes...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
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
... be determined by thermal analyses. The four thermal analysis techniques used most frequently are DSC, TGA, TMA, and rheological analysis. In general thermal characterization practice, the DSC analysis technique may reveal an initial endotherm, assigned to the T g recrystallization temperature, and either...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006927
EISBN: 978-1-62708-395-9
... every idea, even outlandish ones, and the concept development team should be encouraged to come up with as many different concepts as possible. Once all the ideas have been captured, the analysis can begin. During the analysis, each idea can be examined for suitability. Those that will not work can...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... the mechanisms of polymer wear and to quantify wear in terms of wear rate (rate of removal of the material). This analysis is restricted mostly to base polymers (with no fillers). Normally, polymers used in tribological applications are subjected to sliding against hard surfaces such as metals. A polymer-polymer...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006941
EISBN: 978-1-62708-395-9
... mechanical behavior of plastic materials. However, viscoelasticity is primarily the term used for solid polymers, while rheologic terminology would be used to describe the flow of liquid polymers. One of the most important reasons for understanding the viscoelastic nature of plastic materials relates...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006934
EISBN: 978-1-62708-395-9
... for homogeneous polymers. The word homogeneous is used to exclude copolymers and blends that undergo microphase separation or phase changes. However, the differences between crystalline and amorphous polymers are identified. The application of this review to the practical problems of failure analysis...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006850
EISBN: 978-1-62708-395-9
... are expanded, using wear data and micrographs from published works. The primary goals are to present the mechanisms of polymer wear and to quantify wear in terms of wear rate (rate of removal of the material). This analysis is restricted mostly to base polymers (with no fillers). Normally, polymers used...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006788
EISBN: 978-1-62708-295-2
... failures. aluminum copper corrosion prevention corrosion-resistant alloys failure analysis heat exchangers microbiologically influenced corrosion microorganisms piping steel tanks MECHANISMS OF MICROBIOLOGICALLY influenced corrosion (MIC) is the focus of this article as a basis...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... properties by looking at a structure on paper is an active area of research ( Ref 11 ). Molecular Structure Polymer molecules are chains of repeat units called mers. The length of the chain (number of mers) affects the thermal, mechanical, and rheological properties of plastics, as shown in Table 3...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... in electronic control and data analysis imply the use of numerous sensors and therefore connectors right next to the engines (automotive, plane, train, etc.). Enduring high-frequency vibrations as well as cyclical thermal loadings, the pin-clip interface experiences fretting wear damage ( Fig. 5 ). Noble...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006928
EISBN: 978-1-62708-395-9
... below their glass transition temperatures, glassy or semicrystalline polymers are weakly viscoelastic. For these polymers, test data based on a time-independent analysis will probably be adequate. As the temperature is increased, either by the environment or by heat given off during deformation...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006944
EISBN: 978-1-62708-395-9
... of crazing are PMMA and PS for brittle glassy polymers. Failure mechanisms resulting from the initiation of crazing in the presence of a chemical agent such as ESC are among the most important areas in the failure analysis of polymers. Semi-crystalline polymers such as polycarbonate (PC) can similarly...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... to go through 10,000+ kg (22,000+ lb) of resin, so careful material and rheological characterization with each shipment is recommended to monitor for lot-to-lot variations. Equipment Overview All extruders use common equipment, including the drive motor, hopper, barrel, screw(s), and the die...