ABOUT INDEXING EDITORIAL BOARD ARCHIVES AUTHOR GUIDELINES SUBMIT PAPER NEWS, EVENTS AUTHOR'S PAGE CONTACT
Materiale Plastice
Cite as: Mater. Plast.
https://doi.org/10.37358/Mat.Plast.1964

OSIM Nr. R102356
ISSN Print 0025-5289
ISSN Online 2668-8220
Materiale Plastice - Latest Issue

Latest Issue >>>
ARCHIVES
   Volume 61, 2024
   Volume 60, 2023
   Volume 59, 2022
   Volume 58, 2021
   Volume 57, 2020
   Volume 56, 2019
   Volume 55, 2018
   Volume 54, 2017
   Volume 53, 2016
   Volume 52, 2015
   Volume 51, 2014
   Volume 50, 2013
   Volume 49, 2012
   Volume 48, 2011
   Volume 47, 2010
   Volume 46, 2009
   Volume 45, 2008
   Volume 44, 2007
   Volume 43, 2006
   Volume 42, 2005
   Volume 41, 2004
   Volume 40, 2003
 
<<<< back

Materiale Plastice (Mater. Plast.), Year 2006, Volume 43, Issue 3,





Studies on Some Viscosity Improvers for Multi-grade Oils 2. Rheological Behaviour of Concentrated Solutions


Abstract:
Rheological measurements of 3; 6; 10 and 12% INFINEUM SV 260 solutions in SAE 10W mineral oil show non-Newtonian behaviour in the temperature range 313-370 K and shear rates ranging between 3 and 1312 s-1: they follow the Bingham model at low concentrations, low shear rates and high temperatures and the Herschel-Bulkley model at high concentration, high shear rates and low temperatures. KELTAN 4200 solutions in the same solvent are more viscous than the corresponding ones given by INFINEUM SV 260 and follow the Herschel-Bulkley model onto the whole studied concentration, shear rate and temperature ranges. The slopes of the lines representing the variation of log viscosity with the reciprocal of temperature increase slightly with concentration between 3 and 10% for INFINEUM SV 260 solutions and decreases for 12%. The lowest slope is given by 3% solution, followed by 12%, and the highest one by 10% solution. KELTAN 4200 solutions present an increase of slope when passing from 3 to 6% and a decrease when the concentration exceeds the last value. The lowest slope was obtained for 12% solution, followed by 3%, while 6% solution has the highest value. This might suggest that KELTAN 4200 could be a better viscosity improver for the mineral oil SAE 10W, both at low and high concentrations. Keywords: rheological behaviour of concentrated polymer solutions, viscosity improvers, multi-grade oils



Issue: 2006 Volume 43, Issue 3
Pages:
Creative Commons License
This article is published under the Creative Commons Attribution 4.0 International License


Downloads number: 0
<<<< back
 
  Search Authors
Crossref Member Badge
 DOI  logo
 Gold Open Access | Source=http://www.plos.org/  | Author=art designer at PLoS
Creative Commons License