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resin transfer molding

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Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006935
EISBN: 978-1-62708-395-9
... for such processes as resin transfer molding and pultrusion, in which the resin must flow through preplaced glass reinforcements. For other processes, such as extra-high-strength molding compound and prepreg compression molding, the resin must be thickened by reaction to stay on the glass reinforcements. With sheet...
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
... reinforced reaction injection molding relative thermal index resin transfer molding room temperature vulcanizing Society of Automotive Engineers scanning Auger microscopy styrene-acrylonitrile styrene butadiene styrene butadiene rubber short beam shear; styrene-butadiene-styrene styrene-ethylene-butylene...
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
... applications, two-part systems are used. For example, in resin transfer molding (RTM), reaction injection molding (RIM), and vacuum assisted resin transfer molding (VARTM), a meter mixer is used to precisely mix parts A and B prior to injecting it into the mold cavity. If the mix ratio is not carefully...
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
... for producing symmetrical parts requiring very high strength in one direction, such as pressure tubes, or for wrapping pressure vessels. The process is also useful for producing continuous oriented-fiber preforms for use in compression molding or resin transfer molding, probably in combination with other...
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
.... Engineering plastics all have, as their principal constituent, one or more synthetic polymer resins and almost universally contain additives. Additives, which have much smaller molecules than polymers, provide color, flexibility, rigidity, flame resistance, weathering resistance, and/or processibility...
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 glass transition temperature. It also provides information on polyimide and bismaleimide resin systems. Representative examples of different types of engineering thermoplastics are discussed primarily in terms of structure and thermal properties. chemical composition elastomeric materials...
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.a0006913
EISBN: 978-1-62708-395-9
... Compression moldings, transfer moldings Aminos (melamine-formaldehyde and urea-formaldehyde) Good general electrical properties, especially arc resistance Compression moldings, extrusions, transfer moldings, laminates, film Diallyl phthalates (DAP) (allylics) Unsurpassed among thermosets in retention...
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
... Abstract This article discusses the most common thermal analysis methods for thermosetting resins. These include differential scanning calorimetry, thermomechanical analysis, thermogravimetric analysis, and dynamic mechanical analysis. The article also discusses the characterization of uncured...
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
... ). The term engineering resin or engineering plastic usually refers only to thermoplastics, which can be molded and remolded to shape, and excludes thermosets such as epoxy resins that cure into an infusible solid. Some rubbers (e.g., polyurethanes) that are cured or vulcanized are nevertheless classed...
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 micrograph ( Fig. 9 ) shows that a transfer layer is formed on the polymer surface in addition to the transfer layer found on the counterface. These strong and highly adhesive transfer layers help improve the wear resistance of the polymer composite. Fig. 8 Specific wear rates for phenolic resin...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006917
EISBN: 978-1-62708-395-9
... entanglement. Further, if the molding process produces poorly fused knit lines, these can act as localized weakened areas, which are highly susceptible to ESC. As such, it is essential that the molding process maintains the integrity of the molding resin by producing adequate crystallinity, polymer chain...
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
... of phenolic resin increases by almost 2 orders of magnitude when fillers such as carbon and aramid fibers are added to the phenolic resin matrix. The micrographs in Fig. 9 show that a transfer layer is formed on the polymer surface in addition to the transfer layer found on the counterface. These strong...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
... Abstract A 2–3 mm thick electroformed nickel mold showed early cracking under thermal load cycles. To determine the root cause, investigators obtained monotonic and cyclic properties of electroformed nickel at various temperatures and identified possible fatigue mechanisms. With the help...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006932
EISBN: 978-1-62708-395-9
... temperatures. Although time-consuming techniques can be used to analyze thermal stresses, several useful qualitative tests are described in this article. Flow-induced orientation effects are also discussed. Orientation commonly occurs in processing using such techniques as extrusion, injection molding...
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
..., especially interior corners. Resin Casting Casting is one of the most basic low-pressure molding processes and utilizes hollow tools or molds, sometimes with a vacuum assist to ensure complete filling of the mold. The low molding pressures allow for the use of low-cost tools, but this can also result...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... specific to the metal group and progress from melting to solidification, casting processing, and finally how the removal of the mold material can affect performance. aluminum casting defects castings copper ductile iron failure analysis gray iron melting solidification steel Introduction...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... iron, gray cast iron, malleable irons, ductile iron, low-alloy steel castings, austenitic steels, corrosion-resistant castings, and cast aluminum alloys are the materials discussed. The article describes the general types of discontinuities or imperfections for traditional casting with sand molds...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006938
EISBN: 978-1-62708-395-9
... and whose contact with the part may be irregular. Due to the often highly complicated nature of product assemblies, the designer must carefully understand the system-level performance and load transfers between components. For plastic components, these considerations include the potential for thermal...
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...