Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Effect of volume fraction and particle size on wall slip in flow of polymeric suspensions
Date
2005-10-05
Author
Gulmus, SA
Yılmazer, Ülkü
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
119
views
0
downloads
Cite This
For especially highly concentrated suspensions, slip at the wall is the controlling phenomenon of their rheological behavior. Upon correction for slip at the wall, concentrated suspensions were observed to have non-Newtonian behavior. In this study, to determine the true rheological behavior of model concentrated suspensions, "multiple gap separation method" was applied using a parallel-disk rheometer. The model suspensions studied were polymethyl methacrylate particles having average particle sizes, in the range of 37-231 mu m, in hydroxyl terminated polybutadiene. The effects of particle size and solid particle volume fraction on the wall slip and the true viscosity of model concentrated suspensions were investigated. It is observed that, as the volume fraction of particles increased, the wall slip velocity and the viscosity corrected for slip effects also increased. In addition, for model suspensions in which the solid volume fraction was >= 81% of the maximum packing fraction, non-Newtonian behavior was observed upon wall slip correction. On the other hand, as the particle size increased, the wall slip velocity was observed to increase and the true viscosity was observed to decrease. (c) 2005 Wiley Periodicals, Inc.
Subject Keywords
Materials Chemistry
,
General Chemistry
,
Surfaces, Coatings and Films
,
Polymers and Plastics
URI
https://hdl.handle.net/11511/56663
Journal
JOURNAL OF APPLIED POLYMER SCIENCE
DOI
https://doi.org/10.1002/app.21928
Collections
Graduate School of Natural and Applied Sciences, Article
Suggestions
OpenMETU
Core
Effect of the surface roughness and construction material on wall slip in the flow of concentrated suspensions
Gulmus, Sergul Acikalin; Yılmazer, Ülkü (Wiley, 2007-03-05)
Recent studies on polyethylene, elastomers, and thermoplastics have revealed that the construction material and surface roughness are two important factors affecting wall slip. In this study, to determine the true rheological behavior of model concentrated suspensions, a multiple-gap separation method was used in a parallel disk rheometer. The model suspensions studied were poly (methyl methacrylate) particles with an average particle size of 121.2 mu m in hydroxyl-terminated polybutadiene. The aim of this ...
Effect of preparation parameters on performance of dense homogeneous polycarbonate gas separation membranes
Hacarlioglu, P; Toppare, Levent Kamil; Yılmaz, Levent (Wiley, 2003-10-17)
The aim of this study is to determine the effect of preparation parameters on the membrane permeation mechanism and separation performances of dense homogeneous poly(bisphenol A carbonate) (PC) membranes. Blade-casting and drop-casting techniques are used for casting films from solutions with varying concentrations. Chloroform and methylene chloride are used to determine the effect of the properties of the casting solvent. Permeation measurements are done with Ar, N-2, O-2, CH4, CO2, and H, gases. The selec...
Effects of Halloysite Nanotubes on the Performance of Plasticized Poly(lactic acid)-Based Composites
Erpek, Canan Esma Yeniova; ÖZKOÇ, GÜRALP; Yılmazer, Ülkü (Wiley, 2016-11-01)
The objective of this study is processing and characterization of Halloysite nanotube (HNT)/poly(lactic acid) (PLA) nanocomposites. As HNT filler, a domestic source was used (ESAN HNT). The results obtained from this HNT were compared with a well-known reference HNT (Nanoclay HNT). To achieve the desired physical properties and clay dispersion, composites were compounded via direct melt mixing in a laboratory twin-screw compounder. However, the constituents were observed to be incompatible without a compati...
Influence of UV stabilizers on the weathering of PETG and PCTT films
Arangdad, Kiarash; Yıldırım, Erol; Detwiler, Andrew; Cleven, Curtis D.; Burk, Christopher; Shamey, Renzo; Pasquinelli, Melissa A.; Freeman, Harold S.; El-Shafei, Ahmed (Wiley, 2019-07-17)
The influence of two UV photostabilizers on the photostability of Polyethylene-co-CHDM-terephthalate (PETG) and Polycyclohexylenedimethylene-Co-TMCD-terephthalate (PCTT) copolyester films was investigated. Untreated films and films containing stabilizer were irradiated. The resulting films were analyzed by attenuated total reflectance Fourier transform infrared (ATR FTIR) spectroscopy, gel permeation chromatography (GPC), and X-ray photoelectron spectroscopy (XPS). FTIR spectra of the irradiated films conta...
Dynamic mechanical properties of dental base material reinforced with glass fiber
Karacaer, O; Dogan, A; Dogan, OM; Usanmaz, Ali (Wiley, 2002-08-22)
Dynamic mechanical properties of poly(methyl methacrylate) (PMMA) reinforced with glass fibers were investigated. The composite used as dental base material contained other additives for different purposes to give the same appearance as natural dentals. The fiber-polymer bonding and orientation of fibers in polymer matrix are very important in the application of the product. To see that, the fibers were treated with silane and compared with untreated fibers. The commercial polymer and monomer used were the ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Gulmus and Ü. Yılmazer, “Effect of volume fraction and particle size on wall slip in flow of polymeric suspensions,”
JOURNAL OF APPLIED POLYMER SCIENCE
, pp. 439–448, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56663.