1.2.3.

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Influence Of Hydrophobe Content On The Solution Rheology Of

Hydrophobically Modified Terpolymer Of SO2,

N,N-Diallyl-N-Carboethoxymethylammonium Chloride

Hussein, IA; Mozumder, MS; Abu Sharkh, BF; Ali, SA; Al-Naizy, R

PERGAMON-ELSEVIER SCIENCE LTD, EUROPEAN POLYMER JOURNAL; pp: 2472-

2482; Vol: 41

King Fahd University of Petroleum & Minerals

http://www.kfupm.edu.sa

Summary

Rheological properties of hydrophobically modified copolymer of SO2, N,N-diallyl-

N-carboethoxymethylammonium chloride and the hydrophobic monomer N,N-diallyl-

N-octadecylammonium chloride were studied. The influence of hydrophobe content

(HP) and polymer concentration was investigated. Polymers with HP content in the

range 1.5-5% were examined and the concentration was varied in the range 2-5 wt%.

Both dynamic and steady-shear experiments were performed in ARES rheometer.

Copolymers were observed to exhibit typical viscoelastic behavior even with low HP

content. Both the dynamic viscosity, eta' and storage modulus, G', increase with the

increase of both the polymer concentration and the HP content of the system. The

viscosity of the high HP content polymer showed a strong shear dependency, while G'

was a weak function of frequency and gel-like behavior was observed. The zero-shear

viscosity, eta(0), showed a strong concentration dependency (eta(0) similar to

phi(alpha); 1.1 < alpha < 5.9). The concentration dependency of eta(0) suggests that

intermolecular association is dominant in the high HP content polymer. Control of the

HP content and polymer concentration of this class of polymers can lead to a wide

range of interesting rheological properties. (c) 2005 Elsevier Ltd. All rights reserved.

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For pre-prints please write to: ihussein@kfupm.edu.sa

Copyright: King Fahd University of Petroleum & Minerals;http://www.kfupm.edu.sa