Modifying the rheological behavior of associative triblock copolymers in aqueous media through surfactant additives

Polymer ◽  
2006 ◽  
Vol 47 (20) ◽  
pp. 7302-7311 ◽  
Author(s):  
Stergios Pispas ◽  
Dimitris Vlassopoulos ◽  
George Fytas ◽  
Benoit Loppinet ◽  
Nikos Hadjichristidis
Keyword(s):  
Rheological Behavior ◽  
Triblock Copolymers ◽  
Aqueous Media

Structural and Rheological Properties of Temperature-Responsive Amphiphilic Triblock Copolymers in Aqueous Media

2017 ◽  
Vol 121 (18) ◽  
pp. 4885-4899 ◽  
Author(s):  
Josefine Eilsø Nielsen ◽  
Kaizheng Zhu ◽  
Sverre Arne Sande ◽  
Lubomír Kováčik ◽  
Dušan Cmarko ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Triblock Copolymers ◽  
Aqueous Media ◽  
Temperature Responsive

Characterization and Physical Properties of New Isobutylene-Based Graft Copolymers

1998 ◽  
Vol 71 (4) ◽  
pp. 803-819 ◽  
Author(s):  
Mun F. Tse ◽  
A. J. Dias ◽  
H-C. Wang
Keyword(s):  
Rheological Behavior ◽  
Triblock Copolymers ◽  
Graft Copolymers ◽  
High Shear ◽  
Shear Dependent Viscosity ◽  
Viscosity Effects ◽  
Lower Viscosity ◽  
Dependent Viscosity ◽  
Hot Melt ◽  
Low Shear

Abstract A number of isobutylene-based graft copolymers with different compositions are compared to several commercial thermoplastic block copolymers, such as SIS, SBS and SEBS, in terms of morphology and viscoelasticity. The backbone of these graft copolymers is a terpolymer (BIMS) of isobutylene, p-methylstyrene and p-bromomethylstyrene, and the side chains are either polystyrene or poly(2,6-dimethyl-1,4-phenylene ether). Graft copolymer synthesis, statistics of graft formation, and stress-strain properties are described. Overall, these graft copolymers exhibit unique shear dependent viscosity effects, such as rapid thickening (quick setting) at low shear and lower viscosity (better processability) at high shear, compared to linear triblock copolymers. The rheological behavior of these graft copolymers could be a key advantage for high-shear calendering, extrusion, hot-melt spraying, and injection molding.

Tailored Rheological Behavior of Mullite and BSAS Suspensions Using a Cationic Polyelectrolyte

2005 ◽  
Author(s):  
Glen H. Kirby ◽  
Kevin M. Cooley ◽  
Beth L. Armstrong
Keyword(s):  
Yield Stress ◽  
Rheological Behavior ◽  
Elastic Moduli ◽  
Flow Behavior ◽  
Critical Concentration ◽  
Aqueous Suspension ◽  
Aqueous Media ◽  
Shear Thinning ◽  
Dip Coating ◽  
Cationic Polyelectrolyte

The effects of a cationic polyelectrolyte, polyethylenimine, on the rheological behavior of aqueous mullite and celsian phase, barium strontium aluminosilicate (BSAS) suspensions have been studied to optimize a dip-coating process. The surface of the ceramic particles was characterized in aqueous media using zeta potential measurements. The ionization behavior and hydrodynamic radius of polyethylenimine in aqueous media was characterized by potentiometric titration and dynamic light scattering measurements, respectively. The rheological behavior of concentrated ceramic suspensions containing polyethylenimine was characterized by stress viscometry and elastic modulus measurements. Polyethylenimine imparts repulsive, electrosteric interactions between mullite and BSAS particles in aqueous suspension, resulting in shear thinning flow behavior, linear elastic moduli, and yield stress values that are minimized for suspensions with a critical PEI concentration of 0.2 mg PEI per m2 of mullite and 0.4 mg PEI per m2 of BSAS, respectively. The elastic moduli and yield stress of mullite and BSAS suspensions were nearly identical at equivalent fractions of their critical PEI concentration. Uniform coatings were obtained upon dipping SiC, Si3N4, and Si-metal substrates into shear-thinning suspensions containing PEI at 81–88% of the critical concentration. Dense mullite coatings were demonstrated on SiC substrates after sintering at 1400°C.

Effect of pH on the single-step synthesis of gold nanoparticles using PEO–PPO–PEO triblock copolymers in aqueous media

2011 ◽  
Vol 363 (2) ◽  
pp. 481-489 ◽  
Author(s):  
Qinghui Shou ◽  
Chen Guo ◽  
Liangrong Yang ◽  
Lianwei Jia ◽  
Chunzhao Liu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Triblock Copolymers ◽  
Aqueous Media ◽  
Single Step ◽  
Effect Of Ph

Rheological Behavior of HEUR Mixtures in Aqueous Media

2007 ◽  
Vol 22 (2) ◽  
pp. 146-150 ◽  
Author(s):  
M. Barmar ◽  
B. Kaffashi
Keyword(s):  
Rheological Behavior ◽  
Aqueous Media

ABC Heterotelechelic Associative Polyelectrolytes. Rheological Behavior in Aqueous Media

2000 ◽  
Vol 33 (24) ◽  
pp. 9054-9059 ◽  
Author(s):  
Constantinos Tsitsilianis ◽  
Ilias Katsampas ◽  
Vasiliki Sfika
Keyword(s):  
Rheological Behavior ◽  
Aqueous Media

RAFT-synthesized diblock and triblock copolymers: thermally-induced supramolecular assembly in aqueous media

Soft Matter ◽  
2008 ◽  
Vol 4 (9) ◽  
pp. 1760 ◽  
Author(s):  
Charles L. McCormick ◽  
Brent S. Sumerlin ◽  
Brad S. Lokitz ◽  
Jonathan E. Stempka
Keyword(s):  
Triblock Copolymers ◽  
Aqueous Media ◽  
Supramolecular Assembly ◽  
Thermally Induced
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