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viscosity modifiers

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780105
EISBN: 978-1-62708-281-5
..., the value for PVC in particular is quite limited because vinyls are the most modified base resins. The ASTM D 3591-97 method ( Ref 3 ) is recommended for determining the logarithmic viscosity of a PVC compound and for assessing the consequences of processing using the molecular weight of the base resin...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870235
EISBN: 978-1-62708-314-0
... accelerators, viscosity modifiers and other flow control additives, fillers and pigments, flexibilizers, and toughening agents. Epoxy-based adhesives are available in two basic cure chemistries: room-temperature and elevated-temperature cure. The properties of two toughened and two untoughened epoxy film...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290243
EISBN: 978-1-62708-306-5
... properties of water-based adhesives can be varied by modifying formulations with various additives. A characteristic specific to water-based latexes is that high-molecular-weight polymers can be dispersed at high solids content while maintaining a fairly low-viscosity liquid phase. These high-molecular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780359
EISBN: 978-1-62708-281-5
..., suitability of material for use Melt flow rate (MFR) Melt viscosity Degradation, compliance with material specification Solution viscosity Intrinsic viscosity Degradation Mechanical testing Strength and elongation properties, modulus Compliance with material specification, mechanical properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780028
EISBN: 978-1-62708-281-5
... coffee cups? The answers to these questions lie in the chemical nature and morphology (structure) of the polymer chains and additions such as fillers, colorants, reinforcing agents, thermal stabilizers, plasticizers, and other modifying agents or additives. The preceding article in this book...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... temperature, μ is the baseline coefficient, and A and B are adjustable curve-fitting parameters. A typical value of B is 51.6 K, while the parameter A is specific to the polymer. A modified Arrhenius relation is also employed to describe feedstock viscosity at high temperatures: (Eq 5.24...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290035
EISBN: 978-1-62708-319-5
..., such as stearates, stearic acid, or magnesium stearate, as well as phosphates and sulfonates, to adjust viscosity, lubricate tooling, disperse particles, or induce binder wetting of the powder. In the case of binders deposited via ink jet printing, the binder contains solvents to lower the viscosity for easier...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
... Abstract This chapter provides an overview of the tools and techniques, as well as some of the underlying theory, that have proven useful for process modeling and simulation. It begins by presenting the framework of a thermoset cure model that accounts for kinetics, viscosity, heat transfer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
... is capable of making very large parts with minimal tooling costs, such as custom-built yacht hulls. In the wet lay-up process, shown schematically in Fig. 5.1 , a dry reinforcement, usually a woven glass cloth, is placed manually on the mold. A low-viscosity liquid resin is then applied to the reinforcement...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230441
EISBN: 978-1-62708-298-3
... air from the substrate surface. The high viscosity of many adhesives in their liquid state makes the removal of air bubbles difficult, even when a vacuum is applied. Moisture, either in the adhesive or on the substrate surface, may also be a source for bubbles when the system is heated [ Packham 1990...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400089
EISBN: 978-1-62708-316-4
... , the Stribeck curve illustrates schematically the onset of various types of lubrication mechanisms as a function of lubricant viscosity, η, sliding velocity, v , and normal pressure, p ( Ref 7.1 ). Fig. 7.2 Stribeck curve showing onset of various lubrication mechanisms. η, lubricant viscosity; v...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... a component. In some approaches, the voids between particles are saturated with binder. In other approaches, a volatile solvent phase is added to reduce viscosity, allowing shaping at low pressures. Many shaping processes require tooling, including a mold cavity. The mold is created to generate the target...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780343
EISBN: 978-1-62708-281-5
... ¯ n = 10 3  to  10 6 Osmometry, vapor pressure M ¯ n M ¯ n = 300 to 30,000, interactions polymer/solvent Dilute solution viscosity Inherent viscosity, reduced viscosity, intrinsic viscosity Viscosity determination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780003
EISBN: 978-1-62708-281-5
... resistance, and/or processibility. They can be grouped into two main categories: (a) those that modify the characteristics of the base polymer by physical means, including plasticizers, lubricants, impact modifiers, fillers, and pigments and (b) those that achieve their effect by chemical reactions...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300391
EISBN: 978-1-62708-323-2
... and friction control, the relationship between viscosity and breakaway friction, and the factors that affect load-carrying capacity and service life. friction control industrial greases liquid lubricants solid-film lubricants DUNCAN DOWSON, a distinguished professor at the University...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290067
EISBN: 978-1-62708-319-5
... J.M. , Mechanical Properties and Pitting Corrosion Behaviour of 316L Stainless Steel Parts Obtained by a Modified Metal Injection Moulding Process , J. Mater. Process. Technol. , Vol 143 , 2003 , p 397 – 402 10.1016/S0924-0136(03)00402-3 • Cawley J.D. , Liu Z. , Mou J...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... of the fluid (viscosity). Amontons (c. 1699) Friction is caused by interference of surface rugosities. Euler (c. 1750) Establishment of the friction equation: F = μ N where F is the force, μ is the coefficient of friction, N is the normal force pressing the members...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.9781627082815
EISBN: 978-1-62708-281-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
.... Polymeric plastics are classified as either thermosets or thermoplastics ( Fig. 7.1 ). Thermosets are low-molecular-weight, low-viscosity monomers (≈2000 cps) that are converted during curing into three-dimensional cross-linked structures that are infusible and insoluble. Cross-linking results from chemical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... of unreinforced thermoset parts. A highly reactive two-component resin system is injected into a closed mold, where the resin quickly reacts and cures. Reaction injection molding resins must have low viscosities (500 to 2,000 cps) and fast cure cycles. Polyurethanes are the most prevalent, but nylons, polyureas...