Nonlinear elasticity and cavitation of a triblock copolymer gel

Soft Matter ◽  
2015 ◽  
Vol 11 (21) ◽  
pp. 4315-4325 ◽  
Author(s):  
Seyed Meysam Hashemnejad ◽  
Santanu Kundu
Keyword(s):  
Nonlinear Elasticity ◽  
Triblock Copolymer ◽  
Nonlinear Rheology ◽  
Physical Gel

We investigate the nonlinear rheology and cavitation phenomena of a strain-stiffening physical gel.

scholarly journals ABA Type Amphiphiles with Poly(2-Benzhydryl-2-Oxazine) Moieties: Synthesis, Characterization and Inverse Thermogelation

2021 ◽  
Author(s):  
Lukas Hahn ◽  
Larissa Keßler ◽  
Lando Polzin ◽  
Lars Fritze ◽  
Holger Helten ◽  
...  
Keyword(s):  
Storage Modulus ◽  
Building Block ◽  
Triblock Copolymer ◽  
High Yield ◽  
Thermoresponsive Polymers ◽  
Amphiphilic Triblock Copolymer ◽  
Physical Gel

<div>Thermoresponsive polymers are frequently discussed for various applications. Here, we introduce a novel amphiphilic triblock copolymer, which undergoes inverse thermogelation, i.e. is forms a physical gel upon cooling. The polymers comprises poly(2-benzhydryl-2-oxazine) as the hydrophobic building block, a polymer which has not been reported to date. The physical gels are surprisingly strong with a storage modulus of 22 kPa at 25 wt.% in water. In addition, relatively high yield and flow points were determined by rheology.</div>

scholarly journals ABA Type Amphiphiles with Poly(2-Benzhydryl-2-Oxazine) Moieties: Synthesis, Characterization and Inverse Thermogelation

2021 ◽  
Author(s):  
Lukas Hahn ◽  
Larissa Keßler ◽  
Lando Polzin ◽  
Lars Fritze ◽  
Holger Helten ◽  
...  
Keyword(s):  
Storage Modulus ◽  
Building Block ◽  
Triblock Copolymer ◽  
High Yield ◽  
Thermoresponsive Polymers ◽  
Amphiphilic Triblock Copolymer ◽  
Physical Gel

<div>Thermoresponsive polymers are frequently discussed for various applications. Here, we introduce a novel amphiphilic triblock copolymer, which undergoes inverse thermogelation, i.e. is forms a physical gel upon cooling. The polymers comprises poly(2-benzhydryl-2-oxazine) as the hydrophobic building block, a polymer which has not been reported to date. The physical gels are surprisingly strong with a storage modulus of 22 kPa at 25 wt.% in water. In addition, relatively high yield and flow points were determined by rheology.</div>

Morphological transformations in solution-cast Styrene-Butadiene-Styrene (SBS) triblock copolymer thin films

1995 ◽  
Vol 53 ◽  
pp. 184-185
Author(s):  
Ginam Kim ◽  
W. Marsillo ◽  
M. Libera
Keyword(s):  
Thin Films ◽  
Triblock Copolymer ◽  
Annealing Treatment ◽  
Minor Component ◽  
Solvent Evaporation ◽  
Single Crystal Substrate ◽  
Transparent Films ◽  
Crystal Substrate ◽  
Solution Cast ◽  
Morphological Transformations

The fact that block copolymers can assume a range of morphologies depending upon such variables as relative block length and molecular weight is now well known. In the case of poly(styrene)[PS]-poly(butadiene)[PB]-poly(styrene) (SBS) triblock copolymer, the morphologies range from spheres (roughly ~20% minor component), to cylinders (roughly 20%~35% minor component), to lamellae (roughly equal component fractions) Most recently, there has been increasing interest in transformations between morphologies by thermal annealing. This paper describes initial results studying the effect of solvent evaporation rate and post-casting annealing treatment on the morphology of SBS thin films.TEM specimens were prepared by solution casting electron transparent films. 50 μl of 0.1 wt% SBS (30% styrene, Mw=14,000, Scientific Polymer Products, Inc.) dissolved in toluene was deposited on a polished NaCl single crystal substrate placed in a small dish. After solvent evaporation the film was cut into small squares, floated from the salt in water, and each square was collected on a Cu grid.

Size Control of Block Polymer Templated Mesoporous Silicate Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Takeo Yamada ◽  
Keisuke Asai ◽  
Kenkichi Ishigure ◽  
Akira Endo ◽  
Hao S. Zhou ◽  
...  
Keyword(s):  
Mesoporous Materials ◽  
Molecular Sieve ◽  
Mesoporous Material ◽  
Triblock Copolymer ◽  
Size Control ◽  
Block Polymer ◽  
New Class ◽  
Mesoporous Silicate ◽  
Cubic Structure ◽  
Silicate Materials

ABSTRACTMesoporous materials have attracted considerable interest because of applications in molecular sieve, catalyst, and adsorbent. It will be useful for new functional device if functional molecules can be incorporated into the pore of mesoporous material. However, it is necessary to synthesize new mesoporous materials with controlled large pore size. Recently, new class of mesoporous materials has been prepared using triblock copolymer as a template. In this paper, we reported that hexagonal and cubic structure silicate mesoporous materials can be synthesized through triblock copolymer templating, and their size was controlled by synthesis condition at condensation.

Liquid crystalline physical-gel electrolytes for stable dye sensitized solar cells

2017 ◽  
Author(s):  
Ammar Khan ◽  
Muhammad Akma Kamarudin ◽  
Sehrish Iqbal ◽  
Hafiyya Malik ◽  
Habib-ur Rehman ◽  
...  
Keyword(s):  
Solar Cells ◽  
Liquid Crystalline ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Gel Electrolytes ◽  
Physical Gel ◽  
Sensitized Solar Cells

Variant of Nonlinear Elasticity Relations

2019 ◽  
Vol 54 (8) ◽  
pp. 1182-1188
Author(s):  
A. A. Markin ◽  
M. Yu. Sokolova
Keyword(s):  
Nonlinear Elasticity

Exploration of trabecular bone nonlinear elasticity using time of flight modulation

2007 ◽  
Author(s):  
Guillaume Renaud ◽  
Samuel Callé ◽  
Jean-Pierre Remenieras ◽  
Marielle Defontaine
Keyword(s):  
Trabecular Bone ◽  
Nonlinear Elasticity ◽  
Time Of Flight

Sticky ends in a self-assembling ABA triblock copolymer: the role of ureas in stimuli-responsive hydrogels

2019 ◽  
Vol 4 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Ryan T. Shafranek ◽  
Joel D. Leger ◽  
Song Zhang ◽  
Munira Khalil ◽  
Xiaodan Gu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Viscoelastic Properties ◽  
Triblock Copolymer ◽  
Thermal Response ◽  
Stimuli Responsive ◽  
Self Assembling ◽  
Polymeric Hydrogels ◽  
Aba Triblock Copolymer ◽  
Responsive Hydrogels

Directed self-assembly in polymeric hydrogels allows tunability of thermal response and viscoelastic properties.

scholarly journals Vibrations of Nonlinear Elastic Structure Excited by Compressible Flow

2021 ◽  
Vol 11 (11) ◽  
pp. 4748
Author(s):  
Monika Balázsová ◽  
Miloslav Feistauer ◽  
Jaromír Horáček ◽  
Adam Kosík
Keyword(s):  
Compressible Flow ◽  
Nonlinear Elasticity ◽  
Vocal Tract ◽  
Stokes Equations ◽  
Vocal Folds ◽  
Nonlinear Material ◽  
Navier Stokes ◽  
Arbitrary Lagrangian Eulerian ◽  
Navier Stokes Equations ◽  
Reliable Solution

This study deals with the development of an accurate, efficient and robust method for the numerical solution of the interaction of compressible flow and nonlinear dynamic elasticity. This problem requires the reliable solution of flow in time-dependent domains and the solution of deformations of elastic bodies formed by several materials with complicated geometry depending on time. In this paper, the fluid–structure interaction (FSI) problem is solved numerically by the space-time discontinuous Galerkin method (STDGM). In the case of compressible flow, we use the compressible Navier–Stokes equations formulated by the arbitrary Lagrangian–Eulerian (ALE) method. The elasticity problem uses the non-stationary formulation of the dynamic system using the St. Venant–Kirchhoff and neo-Hookean models. The STDGM for the nonlinear elasticity is tested on the Hron–Turek benchmark. The main novelty of the study is the numerical simulation of the nonlinear vocal fold vibrations excited by the compressible airflow coming from the trachea to the simplified model of the vocal tract. The computations show that the nonlinear elasticity model of the vocal folds is needed in order to obtain substantially higher accuracy of the computed vocal folds deformation than for the linear elasticity model. Moreover, the numerical simulations showed that the differences between the two considered nonlinear material models are very small.

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