Synthesis, Characterization and Rheological Properties, as a Function of Temperature, of Three Associative Polymers with Different Microstructure Obtained by Solution Polymerization

2008 ◽  
Vol 62 (1) ◽  
pp. 57-67 ◽  
Author(s):  
Julio C. Rico-Valverde ◽  
Enrique J. Jiménez-Regalado
Keyword(s):  
Rheological Properties ◽  
Solution Polymerization ◽  
Associative Polymers

Physical Principles Underlying the Complex Biology of Intracellular Phase Transitions

2020 ◽  
Vol 49 (1) ◽  
pp. 107-133 ◽  
Author(s):  
Jeong-Mo Choi ◽  
Alex S. Holehouse ◽  
Rohit V. Pappu
Keyword(s):  
Phase Transitions ◽  
Rheological Properties ◽  
Recent Work ◽  
Driving Forces ◽  
Rna Molecules ◽  
Associative Polymers ◽  
Different Types ◽  
Condensate Formation ◽  
The Impact ◽  
Physical Principles

Many biomolecular condensates appear to form via spontaneous or driven processes that have the hallmarks of intracellular phase transitions. This suggests that a common underlying physical framework might govern the formation of functionally and compositionally unrelated biomolecular condensates. In this review, we summarize recent work that leverages a stickers-and-spacers framework adapted from the field of associative polymers for understanding how multivalent protein and RNA molecules drive phase transitions that give rise to biomolecular condensates. We discuss how the valence of stickers impacts the driving forces for condensate formation and elaborate on how stickers can be distinguished from spacers in different contexts. We touch on the impact of sticker- and spacer-mediated interactions on the rheological properties of condensates and show how the model can be mapped to known drivers of different types of biomolecular condensates.

A Novel Associative Polymer Network based on Cyclodextrin Inclusion with Tunable Rheological Properties

2006 ◽  
Vol 947 ◽  
Author(s):  
Lin Fu ◽  
Xuhong Guo ◽  
Stephen Lincoln ◽  
Robert K. Prud'homme
Keyword(s):  
Rheological Properties ◽  
Polymer Network ◽  
Sodium Dodecylsulfate ◽  
Titration Calorimetry ◽  
Temperature Sensitive ◽  
Associative Polymers ◽  
Alkyl Chains ◽  
Alkyl Groups ◽  
Dynamic Rheological Properties ◽  
Associative Polymer

ABSTRACTA novel associative polymer network with tunable rheological properties is developed based on cyclodextrin-hydrophobe inclusion. The network is formed from mixtures of two polyacrylic acid (PAA) backbone polymers, one with pendant cyclodextrin groups and one with pendant hydrophobic alkyl groups. The lifetime of the cyclodextrin-hydrophobe inclusion can be well controlled by the length of alkyl chains inserted into the cyclodextrins; also, the binary nature of cyclodextrin-hydrophobe inclusion prevents hydrophobes from forming non-stoichiometric multiple associations. This system can serve as a model associative polymer network to test associative polymers theories. Dynamic rheological properties of this mixture solution can be tuned by adding free cyclodextrins or sodium dodecylsulfate (SDS) to displace polymer to polymer associations. Dynamic moduli change three orders of magnitude from a gel state to a sol state. This polyelectrolyte system is also pH sensitive, salt sensitive and temperature sensitive. The phase behavior of this mixture solution is experimentally studied by light scattering measurements and rheology. The thermodynamics of the cyclodextrin-hydrophobe interaction is independently studied using isothermal titration calorimetry and surface plasmon resonance study.

Characterization and rheological properties of dilute-solutions of three different families of water-soluble copolymers prepared by solution polymerization

2004 ◽  
Vol 12 (5) ◽  
pp. 451-458 ◽  
Author(s):  
Enrique Javier Jiménez-Regalado ◽  
Gregorio Cadenas-Pliego ◽  
Marissa Pérez-Álvarez ◽  
Yessica Hernández-Valdez
Keyword(s):  
Rheological Properties ◽  
Water Soluble ◽  
Solution Polymerization ◽  
Dilute Solutions

scholarly journals Influence of Surfactant and Salt Concentration on the Rheological Properties of Three Different Microstructures of Associative Polyelectrolytes Obtained by Solution Polymerization

2014 ◽  
Vol 05 (14) ◽  
pp. 1387-1396 ◽  
Author(s):  
Areli I. Velazquez-Garcia ◽  
Gregorio Cadenas-Pliego ◽  
Claudia C. Rivera-Vallejo ◽  
Enrique J. Jiménez-Regalado
Keyword(s):  
Rheological Properties ◽  
Salt Concentration ◽  
Solution Polymerization

A zwitterionic polymer containing a hydrophobic group: enhanced rheological properties

2020 ◽  
Vol 44 (23) ◽  
pp. 9703-9711
Author(s):  
Ling Liu ◽  
Shaohua Gou ◽  
Huichao Zhang ◽  
Lihua Zhou ◽  
Lan Tang ◽  
...  
Keyword(s):  
Free Radical ◽  
Rheological Properties ◽  
Solution Polymerization ◽  
Hydrophobic Group ◽  
Zwitterionic Polymer ◽  
Radical Solution ◽  
Long Chain

A zwitterionic polymer containing a hydrophobic long chain, named MANPS, was independently developed by free radical solution polymerization.

Influence of hydrophobe fraction content on the rheological properties of hydrosoluble associative polymers obtained by micellar polymerization

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Enrique J. Jiménez-Regalado ◽  
Elva B. Hernández-Flores
Keyword(s):  
Relaxation Time ◽  
Rheological Properties ◽  
Polymer Concentration ◽  
Water Soluble ◽  
Polymer Chains ◽  
Associative Polymers ◽  
Hydrophobically Modified ◽  
Viscosity Increase ◽  
Increase Rate ◽  
Micellar Polymerization

AbstractThe synthesis, characterization and rheological properties in aqueous solutions of water-soluble associative polymers (AP’s) are reported. Polymer chains consisting of water-soluble polyacrylamides, hydrophobically modified with low amounts of N,N-dihexylacrylamide (1, 2, 3 and 4 mol%) were prepared via free radical micellar polymerization. The properties of these polymers, with respect to the concentration of hydrophobic groups, using steady-flow and oscillatory experiments were compared. An increase of relaxation time (TR) and modulus plateau (G0) was observed in all samples studied. Two different regimes can be clearly distinguished: a first unentangled regime where the viscosity increase rate strongly depends on hydrophobic content and a second entangled regime where the viscosity follows a scaling behavior of the polymer concentration with an exponent close to 4.

scholarly journals Influence of Hydrophobe, Surfactant and Salt Concentrations in Hydrophobically Modified Alkali-Soluble Polymers Obtained by Solution Polymerization

2017 ◽  
Vol 56 (2) ◽  
Author(s):  
Enrique Javier Jiménez Regalado ◽  
Claudia Cecilia Rivera Vallejo ◽  
Hortensia Maldonado Textle ◽  
Ramiro Guerrero ◽  
Jorge Félix Espinosa Muñoz
Keyword(s):  
Aqueous Solution ◽  
Sodium Dodecyl Sulfate ◽  
Electrostatic Interactions ◽  
Sodium Dodecyl ◽  
Solution Polymerization ◽  
Soluble Polymers ◽  
Associative Polymers ◽  
Hydrophobically Modified ◽  
Modified Polymers ◽  
Hydrophobically Modified Polymers

The viscosity of hydrophobically modified alkali-soluble polymers to different hydrophobic macromonomer concentrations in the presence of various concentrations of anionic surfactant and salt were investigated. Associative polymers containing both ionic sites and small number of hydrophobic groups were prepared, and their thickening properties in aqueous solution were investigated. Solution polymerization was used for obtained the different polymers. Relationships between hydrophobe, sodium dodecyl sulfate (SDS) and salt (NaCl) concentrations are proposed. Owing to the competition between attractive hydrophobic interaction and repulsive electrostatic interactions, such hydrophobically modified polymers exhibit various rheological behaviors in aqueous solution depending on hydrophobic macromonomer, SDS and NaCl concentrations.

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