Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13614
Title: Microstructure and rheology of polymer-surfactant solutions
Authors: CHO CHO KHIN
Keywords: HMHEC, viscosity, viscoelastic, thixotropy, surfactants, cloud point
Issue Date: 5-Mar-2004
Source: CHO CHO KHIN (2004-03-05). Microstructure and rheology of polymer-surfactant solutions. ScholarBank@NUS Repository.
Abstract: The rheological properties and microstructure of water-soluble polymer (hydrophobically modified hydroxyethyl cellulose, HMHEC) without/with addition of ionic and nonionic surfactants have been studied by viscometry and laser light scattering. The shear viscosity, viscoelastic properties and thixotropic properties are measured in terms of (1) HMHEC concentration (2) surfactant concentration at fixed HMHEC concentration (3) HMHEC concentration at fixed surfactant concentration (4) types of surfactants.The interactions between HMHEC and surfactants are also investigated via relaxation time and radius of gyration. The effect of temperature on the interaction between polymer and surfactant is also studied. It is found that the effect of HMHEC on the cloud point of nonionic surfactant is significant. Moreover the cloud point temperature has great influence on the rheological properties of polymer-surfactant systems. Although the polymer-surfactant system showed an Arrhenious dependence on temperature at temperatures far from the cloud point, the viscosity of polymer-surfactant systems shows markedly different at near to the cloud point temperature. The viscosity of mixed system increases with increasing temperature and reaches local maximum around their cloud point.
URI: http://scholarbank.nus.edu.sg/handle/10635/13614
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Chapter_1.pdf401.59 kBAdobe PDF

OPEN

NoneView/Download
Chapter_2.pdf132.93 kBAdobe PDF

OPEN

NoneView/Download
Chapter_3.pdf406.78 kBAdobe PDF

OPEN

NoneView/Download
Chapter_4.pdf508.15 kBAdobe PDF

OPEN

NoneView/Download
Chapter_5.pdf249.18 kBAdobe PDF

OPEN

NoneView/Download
Chapter_6.pdf199.14 kBAdobe PDF

OPEN

NoneView/Download

Page view(s)

328
checked on Jan 15, 2018

Download(s)

1,302
checked on Jan 15, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.