1-20 of 141 Search Results for

thermal stability

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
Image
Published: 15 May 2022
Fig. 33 Relative thermal stability of polymers by thermogravimetric analysis (TGA); 10 mg (0.15 gr) at 5 °C/min (9 °F/min), in nitrogen. HDPE, high-density polyethylene; PMMA, polymethyl methacrylate; PTFE, polytetrafluoroethylene; PVC, polyvinyl chloride More
Image
Published: 15 May 2022
Fig. 13 Relative thermal stability of polymers by thermogravimetric analysis; 10 mg (0.15 gr) at 5 °C/min (9 °F/min) in nitrogen. PVC, polyvinyl chloride; PMMA, polymethylmethacrylate; HDPE, high-density polyethylene; PTFE, polytetrafluoroethylene; PI, polyimide More
Image
Published: 01 January 2002
Fig. 37 Thermogravimetric analysis weight-loss profile comparison showing a reduction in the thermal stability of the discolored surface material relative to the base material More
Image
Published: 01 June 2019
Fig. 4 Thermogravimetric analysis weight-loss profile comparison showing a reduction in the thermal stability of the discolored surface material relative to the base material More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0090439
EISBN: 978-1-62708-220-4
... their relative thermal stability, the two tubing materials were analyzed via thermogravimetric analysis (TGA). Both sets of results were consistent with those expected for plasticized PVC resins. The thermograms representing the reference and failed sample materials showed comparable plasticizer contents of 28...
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
... and Taylor ( Ref 11 ) and Wood ( Ref 12 ). Copolymerization is also frequently used to change the properties of plastics. For example, copolymerization with vinyl acetate increases the processibility and thermal stability of polyvinyl chloride (PVC). Copolymerization of acrylonitrile with styrene...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001901
EISBN: 978-1-62708-218-1
... conditions, thermal stability can be determined. This article discusses the application of TGA and DSC in the failure analysis of an automotive polyoxymethylene (POM) sensor housing that was depolymerizing during service. Sensor Housing Failure A high-end automobile was purchased from an American...
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
... of polymerization, fusion, T g , T m Phase changes, reaction kinetics degree of cross linking, degradation inhibitor content and effectiveness Thermogravimetric analysis (TGA) Composition, weight loss with time or temperature Thermal and oxidative stability, volatilization kinetics Dynamic mechanical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
..., however, it is somewhat notch sensitive. As a class of materials, polysulfone is known for good electrical insulation properties, excellent thermal stability, and exceptional hydrolytic stability. Because of its unique combination of thermal and hydrolytic properties, polysulfone is commonly used...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0090460
EISBN: 978-1-62708-234-1
... temperature corresponding to the onset of polymer decomposition. This is illustrated in Fig. 4 . Fig. 4 Thermogravimetric analysis weight-loss profile comparison showing a reduction in the thermal stability of the discolored surface material relative to the base material Conclusions...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
... polymers, heterochain polymers, and polymers containing aromatic rings. The article also includes some general information on the classification and naming of polymers and plastics. The most important properties of polymers, namely, thermal, mechanical, chemical, electrical, and optical properties...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... reaction to occur, using the appropriate thermodynamic calculations. This should be done in two steps: Verify the available thermodynamic data for the thermal stability of each constituent. Make the appropriate thermodynamic calculations to estimate the free enthalpy variations (Δ G ) r , for all...
Image
Published: 15 January 2021
Fig. 29 Comparison of typical distress experienced by conventional thermal barrier coatings (TBCs) (7 to 8 yttria-stabilized zirconia) with an advanced TBC based on gadolinium-zirconate (pyrochlore). Courtesy of Pratt & Whitney Aircraft More
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006939
EISBN: 978-1-62708-395-9
... due to poor thermal-oxidative stability ( Ref 1 ). The use of additives in thermosetting polymers is equally important. One of the oldest thermosets, Bakelite, exhibits high cure shrinkage, which leads to cracks in the mold material ( Ref 2 ). Suitable filler additives reduce the cure shrinkage...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006920
EISBN: 978-1-62708-395-9
... of HALS derivates have been developed, which are resistant to sulfur-containing biocides. The HALS stabilizers, especially in the form of the catalytic active amino ether, may decompose thermally. This limits their application in polymers, requiring a high processing temperature. The HALS stabilizers...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003525
EISBN: 978-1-62708-180-1
.... The weight of the evaluated material can decrease due to volatilization or decomposition or increase because of gas absorption or chemical reaction. Thermogravimetric analysis can provide valuable information regarding the composition and thermal stability of polymeric materials. The obtained data can...
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
...- and/or geometry-dependent. ASTM and ISO specimens are prepared for typical thermomechanical characterization of tensile, flexural, and impact properties; melt flow analyses; and thermal dimensional stability using deflection temperature under load (DTUL) testing. One globally recognized opportunity to compare...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
... or decomposition or increase because of gas absorption or chemical reaction. Thermogravimetric analysis can provide valuable information regarding the composition and thermal stability of polymeric materials. The obtained data can include the volatile content, inorganic filler content, glass-fiber level, carbon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001171
EISBN: 978-1-62708-219-8
... the precipitation (including reduction of carbon content, appropriate heat treatment, cold work of steel, reduction of austenitic grain size and stabilizing elements) were described. The presence of microcracks due to highly localized heat concentrations with consequent thermal expansion and considerable shrinkages...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... oxidation, thermal cycling, internal oxidation, the presence of moisture, and chloride- and sulfur-containing gases shorten service compared with those predicted from isothermal oxidation. Loss of oxide adhesion and integrity can cause mechanical damage via spallation and cracking of the oxide film from...