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Thermogravimetric analysis

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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
...Abstract Abstract Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to analyze an automotive polyoxymethylene (POM) sensor housing that was depolymerizing during service. It was found that a combination of heat, oxygen, and sulfuric acid attacked and caused...
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
... (PVC) resin plasticized with trioctyl trimellitate. Investigation included visual inspection, micro-FTIR in the ATR mode, and thermogravimetric analysis. The spectrum on the failed tubing exhibited absorption bands indicative of a PVC resin containing an adipate-based plasticizer. Thermograms...
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
..., contamination, degradation, chemical contact Differential scanning calorimetry (DSC) Heat of fusion, melting point, glass transition temperature, heat capacity Material identification, level of crystallinity, aging/degradation, thermal history Thermogravimetric analysis (TGA) Weight loss over...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001798
EISBN: 978-1-62708-241-9
... with thermogravimetric analysis. Based on test data, the epoxy resin had not been properly cured and was hydrolyzed in its compromised state because of humidity. Hence, the depolymerized material gradually softened to the point where the effect of creep caused it to flow, ultimately causing the failure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001767
EISBN: 978-1-62708-241-9
... analyzed using optical and scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The exterior surfaces of all six brackets were alike and shared similar features, including witness marks, discoloration, mechanical deformation, and secondary...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090466
EISBN: 978-1-62708-218-1
... and subsequently lowered the ductility of the molded hinge assemblies. No recommendations were made. Fourier transform infrared analysis Hinges Nylon Thermogravimetric analysis 13% glass-fiber reinforced nylon Brittle fracture A production lot of mechanical hinges had failed during incoming quality...
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 It was the conclusion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0090454
EISBN: 978-1-62708-220-4
... with those expected for a HDPE resin. The results also showed that the HDPE resin had a relatively high level of crystallinity, as indicated by the elevated heat of fusion. Thermogravimetric analysis was performed to further evaluate the failed vessel material. The TGA testing showed that the HDPE...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... in the corners of the outer ring and grew large enough for a fracture to occur. cylindrical roller bearing fatigue fracture grease degradation bearing steel leaded brass retained austenite Raman spectroscopy thermogravimetric analysis chemical composition GCr15 (high-carbon chromium-alloy steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090457
EISBN: 978-1-62708-222-8
... of undercrystallization found in the failed parts, however, was moderate in nature and not thought to be a major factor in the failures. Thermogravimetric analysis was also performed on the latch material, and the obtained results were consistent with those expected for an unfilled polyacetal copolymer. The latch...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
...) consists of various analytical techniques in which a property of the sample is measured against time or temperature while the temperature of the sample is programmed. Three primary TA techniques are differential scanning calorimetry, thermogravimetric analysis, and thermomechanical analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... Thermal analysis of polymeric materials can be used in conjunction with FTIR or Raman spectroscopy to confirm the chemistry of a polymeric material. Although methods such as differential scanning calorimetry and thermogravimetric analysis are used for ascertaining the mechanical and physical properties...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... (DSC) Heat of polymerization, fusion, T g , T m Thermogravimetric analysis (TGA) Composition, weight loss with time or temperature Dynamic mechanical analysis (DMA) Elastic modulus, loss modulus, tan delta Thermomechanical analysis (TMA) Penetration temperature, expansion coefficient...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... (DSC) Heat of polymerization, fusion, T g , T m Thermogravimetric analysis (TGA) Composition, weight loss with time or temperature Dynamic mechanical analysis (DMA) Elastic modulus, loss modulus, tan delta Thermomechanical analysis (TMA) Penetration temperature, expansion coefficient...