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Polyoxymethylene

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Image
Published: 01 January 2002
Fig. 9 Surface-microcracking network developed on polyoxymethylene due to ultraviolet exposure. 200× More
Image
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
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...
Image
Published: 01 November 1995
Fig. 20 Tensile creep test data for polysulfone (PSU), polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), and polyacetal (polyoxymethylene) at 22 °C (72 °F) and 21 MPa (3 ksi). Source: Ref 29 More
Image
Published: 01 January 1993
Fig. 14 Diagram for assessment of welding capacity of thermoplastics. Arrow direction shows increase in weldability by the indirect method. LDPE, low-density polyethylene; HDPE, high-density polyethylene; PA, polyamide; POM, polyoxymethylene. Source: Ref 34 More
Book Chapter

By Koji Kato
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006394
EISBN: 978-1-62708-192-4
... cutting plastic flow plowing polishing wear polyethylene polyoxymethylene superlow friction superlubricity surface smoothing wear control wedge forming THE TERM POLISHING WEAR is used to describe the type of wear that produces a mirrorlike, smooth finish on at least one of the two rubbing...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005687
EISBN: 978-1-62708-198-6
... Polymethylpentene PMP Catheters—accessories Poly(oxymethylene) Poly(oxymethylene), homopolymer ASTM F1855 Acetal resin, paraformaldehyde, polyacetal, polyformaldehyde, polyoxymethylene POM, POM-H Fixation devices Catheters—accessories; heart valves Poly(oxymethylene), copolymer ASTM F1855...
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: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006373
EISBN: 978-1-62708-192-4
... polymers are used at high temperature as matrices for polymer composites. Polymer gears, bushings, and sliding bearings are made of polyformaldehyde, polyoxymethylene, polycarbonate, and polyacrylate. Among thermosetting polymers used for antifriction applications are polyimides, which stand out because...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0006515
EISBN: 978-1-62708-200-6
... OSA olefin-modified styrene-acrylonitrile terephthalate) and RIM reaction injection molding OSHA Occupational Safety and Health polybutylene terephthalate POM polyoxymethylene rms, RMS root mean square Administration ROC rapid omnidirectional compaction oz ounce PP polypropylene ROM rough order...
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
... for Unfilled and Filled Polyoxymethylene , Wear , Vol 30 , 1974 , p 337 – 348 10.1016/0043-1648(74)90148-3 8. Viswanath N. and Bellow D.G. , Development of an Equation for the Wear of Polymers , Wear , Vol 181–183 , 1995 , p 42 – 49 9. Evans D.G. and Lancaster J.K...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006021
EISBN: 978-1-62708-175-7
... composed of several organic components to ensure meeting process requirements. Various organic substances, such as waxes (e.g., paraffin wax), and thermoplastic materials such as polyethylene (PE), polypropylene (PP), polyoxymethylene (POM), and polyethylene glycol (PEG), as well as various additives...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006410
EISBN: 978-1-62708-192-4
... ). Polyoxymethylene (POM), aka Polyacetal POM exhibits a low friction coefficient; low wear rate; and a unique balance of mechanical, thermal, chemical, and electrical properties. Depending on the chain structure, both homopolymer (POM-H) and copolymer (POM-C) grades are available to meet different requirements...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
... with material loss. In the material-loss mode, cracks appear in the surface. For synthetic fluorine-containing resin and polyoxymethylene tested against 17-4 PH stainless steel counterfaces, wear rates for normal impacts at low stress were very low ( Ref 49 ). In compound-impact wear, rates were higher...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002464
EISBN: 978-1-62708-194-8
... (PTFE) 17–21 126 327 Polyvinyl acetate (PVAC) Soft 29 … Polyvinyl alcohol (PVOH) 83–152 85 T d < T m Polyacrylonitrile (PAN) … 104 T d < T m Polyoxymethylene (POM or polyacetal) 70 −50 175 Polyethylene oxide (PEO) 13–22 −55 66...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003007
EISBN: 978-1-62708-200-6
..., 10 −5 /K °C °F °C °F W/m · K Btu · in./h · ft 2 · °F Acrylonitrile-butadiene-styrene (ABS) 99 210 60 140 0.27 1.9 5.3 ABS-polycarbonate (ABS-PC) alloy 115 240 60 140 0.25 1.7 3.5 Diallyl phthalate (DAP) 285 545 130 265 0.36 2.5 2.7 Polyoxymethylene (POM...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001469
EISBN: 978-1-62708-173-3
..., polyoxymethylene. Source: Ref 34 Key Joining Parameters The key joining parameters of ultrasonic welding are the: Amplitude of vibration during joining Pressure applied during the welding operation Joint geometry when welding amorphous and semicrystalline polymers Welding time and energy...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005676
EISBN: 978-1-62708-198-6
... Clariant High stiffness, strength, and toughness 50 120 260 500 Polyethylene terephthalate PET Eastar Selar Barrier properties, excellent clarity, hard, strong, and extremely tough 70 160 265 510 Dacron Polyoxymethylene or polyacetal copolymers POM or acetal copolymers Celcon, Delrin...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003028
EISBN: 978-1-62708-200-6
... methacrylate. Polyoxymethylene (POM) also may be thermally depolymerized to produce formaldehyde, but this degradation is prevented in commercial polymers by capping the terminal hydroxyl groups or by producing a more stable copolymer of formaldehyde and ethylene oxide. Hydrogen chloride is evolved when...
Book Chapter

By Matthew Donachie
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003168
EISBN: 978-1-62708-199-3
..., the corrosion resistance and biocompatibility of titanium, and the fabricability of stainless steel. Alloys used in articulating prosthesis applications are often used in conjunction with other biomaterials such as UHMWPE, polyoxymethylene (Delrin-150), or aluminum oxide ceramics. A typical hip prosthesis...