Results 261 to 270 of about 26,893 (289)

Olefin Copolymer Viscosity Modifiers

2003
Olefin copolymer (OCP) viscosity modifiers are oil-soluble copolymers comprising ethylene and propylene and may contain a third monomer, a nonconjugated diene, as well. There are many ways to classify OCP viscosity modifiers. From a user's perspective, OCPs are marketed as either solids, liquid concentrates, or viscous liquids.
openaire   +2 more sources

MODIFIED VISCOSE RAYON FIBRES

Journal of the Textile Institute Proceedings, 1961
An account is given of two relatively new regenerated cellulose fibres, produced by modifications of the viscose process. Fibre properties are described, followed by discussion of processing characteristics and fabric production. Fabric developments, actual and potential, are considered and the place of these fibres in the man-made fibre scheme is ...
openaire   +1 more source

Deoxyribonucleoside‐Modified Squaraines as Near‐IR Viscosity Sensors

Chemistry – A European Journal, 2014
AbstractDeoxyribonucleoside‐modified squaraines were synthesized by Sonogashira coupling reactions using an unsymmetrical, terminal alkynylated benzothiazolium squaraine dye. These non‐natural nucleosides exhibited fluorescent ‘turn‐on’ properties in viscous conditions with an enhancement of >300‐fold.
Zhang, Yuanwei, Yue, Xiling, Kim, Bosung, Yao, Sheng, Belfield, Kevin D.   +4 more
openaire   +3 more sources

Viscosity Modifiers to Enhance Concrete Performance

ACI Materials Journal, 2013
The hazard rate function for concrete structures is often portrayed as a “bathtub”-shaped curve, with a finite ever-decreasing probability of early-age failures being followed by a life with a relatively low constant probability of failure that ultimately increases dramatically as the end of service is reached. Ideally, new concrete technologies should
openaire   +1 more source

Literature review of OCP viscosity modifiers

Lubrication Science, 1989
AbstractOlefin copolymers and terpolymers (OCPs) are used as viscosity modifiers in a large proportion of the European and world multigrade oil market. The polymer properties of the basic ethylene propylene polymers are critical to the physical characteristics of the final lubricant and its engine performance.
openaire   +1 more source

Hydrogenated Styrene–Diene Copolymer Viscosity Modifiers

2017
This chapter focuses on hydrogenated styrene-diene (HSD) copolymers. The first commercial HSD polymers were introduced in the early 1970s. The properties of the HSD copolymer depend on the polymer architecture, molecular weight, and monomer chemistry, and literature is full of different copolymer designs and compositions that can find application as ...
Isabella Goldmints, Sonia Oberoi
openaire   +1 more source

The Modern Viscosity Modifiers of Engine Oils

World of petroleum products, 2022
This article discusses the pecularities of chemistry and architecture of polymers – modern viscosity modifiers of engine oils, the proposed mechanism of their action, influence the rheological, dispersing properties, energy- and resource saving propertiesof engine oils.
openaire   +1 more source

Viscosity Measurements of Polymer Modified Asphalts

1992
Five samples of polymer modified asphalt were tested for viscosity at 60°C (140°F) using ASTM Test Method D2171 (Viscosity of Asphalts by Vacuum Capillary Viscometer). The samples were obtained from four different suppliers, and the polymers used included SB (styrene-butadiene), SBR (styrene-butadiene rubber latex), SBS (styrene-butadiene-styrene block
openaire   +1 more source

Viscosity Measurements on Polymer Modified Oils

A S L E Transactions, 1958
The experimental check described proved that viscosity measurements on polymer modified oils with rotational and capillary viscometers can be successfully correlated. The rules for this are the same as those used for other non-Newtonian liquids (solutions of high polymers); namely, viscosity vs. the rate of shear at the wall, R.
openaire   +1 more source

A modified method for measuring surface viscosity

Journal of Colloid Science, 1958
Abstract The oscillating disk method for measuring the surface viscosity has been used without recourse to a reference liquid. It has been found that for a pure liquid the logarithmic decrement obtained with the disk positioned in the liquid is twice as large as that obtained with the disk oscillating at the surface of the liquid, providing the ...
R Bulas, C.A Kumins
openaire   +1 more source