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Polyoxymethylene

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0092103
EISBN: 978-1-62708-234-1
... Abstract A polyoxymethylene gear wheel that had been in operation in a boiler room failed. Investigation (visual inspection and 305x images) supported the conclusion that failure was due to postcrystallization causing considerable shrinkage. Breakdown along the crystalline superstructure...
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Published: 01 January 2002
Fig. 16 Failed polyoxymethylene gear wheel that had been in operation in a boiler-room environment. 305×. Source: Ref 53 More
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Published: 01 January 2002
Fig. 9 Surface-microcracking network developed on polyoxymethylene due to ultraviolet exposure. 200× More
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Published: 01 June 2019
Fig. 1 Failed polyoxymethylene gear wheel that had been in operation in a boiler-room environment. 305×. Source: Ref 1 More
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Published: 15 May 2022
Fig. 17 SEM fractograph of an interspherulitic fracture in polyoxymethylene. Original magnification: 3500× More
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Published: 15 May 2022
Fig. 3 Creep data obtained for polyoxymethylene at 50 °C (122 °F) and shifted to longer times at 23 °C (73 °F) using the Arrhenius equation are in good agreement with experimental data obtained at 23 °C. Source: Ref 11 More
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
... failure of an antifriction bearing, a nylon driving gear, and a polyoxymethylene gear wheel. antifriction bearing cohesive wear elastomers glassy thermoplastics interfacial wear lubricant mechanical properties nylon nylon driving gear plastics polyoxymethylene gear wheel semicrystalline...
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 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 premature...
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Published: 15 May 2022
Fig. 36 Loading-rate dependence of fracture toughness. FBA, force-based analysis; DKC, dynamic key curve; POM, polyoxymethylene More
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Published: 15 May 2022
Fig. 34 Determination of the loading-rate dependence of time to fracture ( t f ) and assignment of the critical dynamic loading rate ( v critdyn ) of Charpy specimens for a polyoxymethylene (POM) homopolymer More
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Published: 15 May 2022
Fig. 33 SEM fractographs of interspherulitic failure of polymer parts manufactured from injection-molded polyoxymethylene. (a) Environmental stress cracking in domestic water containing chloride. Original magnification: 1500×. (b) Chemical attack and degradation. Original magnification: 1000× More
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Published: 15 May 2022
; PVC, poly(vinyl chloride); PEEK, Polyetheretherketone; PPS, Polyphenylene sulfide; VE, Vinyl ester; PF, Phenolic; PVDF, Polyvinylidene difluoride; PA, Polyamide; PP, Polypropylene; POM, Polyoxymethylene; PE, Polyethylene; EVA, Ethylene vinylacetate More
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006945
EISBN: 978-1-62708-395-9
... TPA TPES TPI TPI TPUR polyoxymethylene polypropylene paraphenylenediamine polyphenylene ether polyphenylene oxide polypropylene oxide polyphenylene sul de polyphenylene sulfone polystyrene polysulfone polysulfone polychlorotri uoroethylene polytetra uoroethylene polyurethane polyurethane polyvinyl...
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
... –71 –96 56–65 133–149 … … Cis-1,4-polyisoprene, natural rubber –67 –89 15–50 59–122 … … Polypropylene oxide –62 –80 65 149 … … Polyethylene oxide (PEO) –55 –67 66 151 13–22 1.9–3.2 Polyoxymethylene (POM or polyacetal) –50 –58 175 347 70 10.2 Polyvinylidene...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006929
EISBN: 978-1-62708-395-9
... (PES) 0.1 2.0 Polyetheretherketone (PEEK) 0.1 0.5 Polyoxymethylene (POM) 0.25 0.9 Polyphenylene Sulfone (PPSU) 0.36 1.2 Polyphthalamide (PPA) 0.5 2.2 Polypropylene (PP) 0.01 0.1 Polystyrene (PS) 0.01 0.1 Polysulfone (PSU) 0.2 0.9 Polytetrafluoroethylene (PTFE) 0...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... induced in a polyoxymethylene specimen exposed to ultraviolet (UV) light in the laboratory for 1000 h. It should be noted, however, that some polymers are intrinsically more resistant to degradation than others. The following common polymers are ranked with respect to their relative resistance...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006922
EISBN: 978-1-62708-395-9
... Polyamide 6/12 PA6/12 Polyphthalamide PPA Polyarylamide PARA Polybutylene terephthalate PBT Liquid crystal polymer LCP Polyoxymethylene POM Polyphenylene sulfide PPS Ethylene vinylacetate EVA Polyetheretherketone PEEK Polytetrafluoroethylene PTFE Polylactide PLA...
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
.... , Yang Z.G. , Li X.H. : Mechanical and tribology properties of polyoxymethylene modified with nanoparticles and solid lubricants . Polym. Eng. Sci . 48 ( 9 ), 1824 – 1832 ( 2008 ) 10.1002/pen.21150 11. Bala Srinivasan P. , Blawert C. , Dietzel W. : Dry sliding wear...
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
... relation using the principles of dimensional analysis. Using data obtained for polyoxymethylene (POM) and PTFE-filled POM, Kar and Bahadur obtained a relation given as: (Eq 4) V = 1.5 K   ( γ 1.775 / E 3.225 ) P 1.47   L 1.25 where V is the volume loss, K...
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 chain molecules or the presence of branching). Thus, T g is inversely proportional to the mobility of the chain molecules, which causes an increase in the flexibility of the material. For example, polyoxymethylene (POM) or polyethylene (PE) has a glass transition temperature value below ambient...