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resin viscosity

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Published: 01 January 2001
Fig. 15 Viscosity and pot life of BMI resin 5250-4RTM More
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Published: 01 November 1995
Fig. 22 Typical viscosity profile for LARC-160 polyimide resin More
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Published: 15 May 2022
Fig. 6 Steady-state viscosity as a function of shear rate for an epoxy resin with various levels of silica filler. Source: Ref 12 More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003362
EISBN: 978-1-62708-195-5
... composite applications because they offer a unique combination of properties that are unattainable with other thermoset resins. Available in a wide variety of physical forms from low-viscosity liquid to high-melting solids, they are amenable to a wide range of processes and applications. Epoxies offer high...
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
... properties of polymer. This is followed by a section describing molecular weight determination using viscosity measurements. Next, the article discusses the use of cone and plate and parallel plate geometries in melt rheology. It then reviews the processes involved in the analysis of thermoplastic resins...
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Published: 01 November 1995
Fig. 8 Melt viscosity of representative cyanate resins More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003366
EISBN: 978-1-62708-195-5
... to the current and future market needs and have tailored the resin chemistry for the following state-of- the-art fabrication processes: solution/hot-melt process, pultrusion, vacuum infusion, filament winding, sheet molding, and hand lay-up ( Ref 5 , 13 , 14 , and 15 ). Typical viscosity and cure...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003414
EISBN: 978-1-62708-195-5
... at ambient pressure), a leak in the mold would just result in resin spillage. Besides, air will flow into the mold much easier than resin will flow out of the mold (i.e., the viscosity of air is much smaller than the viscosity of the resin). Although vacuum infusion is considered a recent development...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003020
EISBN: 978-1-62708-200-6
... There are some subtle differences in both processes that may be significant. For example, the SRIM process uses preforms that are less complex in construction and lower in reinforcement content than those used in the RTM process. The SRIM resin systems currently available build viscosity rapidly, which equates...
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
... be compared to the virgin resin to determine the extent of degradation due to the molding process, since degraded material would be lower in viscosity because of its reduced molecular weight. Figure 4 shows the results of a relative viscosity test conducted on normally ductile nylon wire ties that failed...
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003360
EISBN: 978-1-62708-195-5
... group is well known and is a mature technology ( Ref 5 , 6 , and 7 ). A wide range of epoxy-containing ingredients are available, as well as a wide range of curing agents and catalysts. Resins with different viscosities, amounts of reactive groups, and structures are available. Additives that change...
Book Chapter

By Don Smith
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006553
EISBN: 978-1-62708-290-7
... first-in, first-out rotation of material. Consult with the manufacturer and review the safety data sheet for resin-specific data. If unsure of the quality of the material, a viscosity test can be used to help determine if the material has started polymerization. When transferring material to the VP...
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003412
EISBN: 978-1-62708-195-5
... on material viscosity during cure The chemistry data are also used to define heat transfer, fluid, and gas transport requirements for the specific part configuration being built. Resin viscosity and kinetics interact with gas diffusion processes and fluid hydrostatic pressure through the time...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006882
EISBN: 978-1-62708-392-8
... and is based on the reverse principle of computed tomography (CT) ( Ref 23 ). The fabrication quality and resolution provided by this technology relies on multiple factors such as resin viscosity and reactivity, an understanding of the dynamic light patterning, and the quality of the tomographic model...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003402
EISBN: 978-1-62708-195-5
... and the resin deform together, like a dough containing strands of continuous wires or wire screens under applied stress to form the composite shape. The presence of fibers creates anisotropic resistance to the applied load, and usually the viscosity can be over a million times that of water. This prevents large...
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
... , the impact of silica filler on the rheological profile is profound. The yellow/green squares in the bottom curve represent the viscosity of the neat epoxy resin (i.e., 0% filler loading). Note that the resin viscosity is independent of the shear stress (indicating that it is a Newtonian fluid). Most highly...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003413
EISBN: 978-1-62708-195-5
... by circulating the reactants. For high-viscosity systems, trace heating is used on resin supply lines and fittings. A comprehensive review of RIM processing and processing equipment is provided by Macosko ( Ref 3 ). Vacuum-Assisted Resin Injection Vacuum-assisted resin injection has broad industrial...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003432
EISBN: 978-1-62708-195-5
... or by titration using a Karl Fisher apparatus. Melting Point The melting point temperature of the resin influences how it is processed, and it should be measured using a calorimetric or dilatometric technique. Softening Point and Viscosity Because the viscosity of the resin affects system...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009078
EISBN: 978-1-62708-177-1
... variables, including the resin viscosity, gelation time, fiber bed permeability and architecture, lay-up, impregnation, ramp rate, cure cycle, and applied pressure. Depending on these variables, the hydrostatic resin pressure may vary over the duration of the cure cycle and throughout the laminate thickness...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003435
EISBN: 978-1-62708-195-5
..., there will be a more pronounced need for process control because the industry simply cannot afford to throw away even one large part. There are a host of properties that can be measured for use in real-time control, including tool or part temperature ( Ref 2 ), pressure, vacuum level, resin viscosity, flow rate...