Viscoelastic Behavior of Semidilute Solutions of Multisticker Polymer Chains

1999 ◽  
Vol 32 (25) ◽  
pp. 8580-8588 ◽  
Author(s):  
Enrique Jiménez Regalado ◽  
Joseph Selb ◽  
Françoise Candau
Keyword(s):  
Viscoelastic Behavior ◽  
Polymer Chains ◽  
Semidilute Solutions

scholarly journals Copper Containing Glass-Based Bone Adhesives for Orthopaedic Applications: Glass Characterization and Advanced Mechanical Evaluation

2020 ◽  
Author(s):  
Sahar. Mokhtari ◽  
Anthony.W. Wren
Keyword(s):  
Mechanical Properties ◽  
Photoelectron Spectroscopy ◽  
Structural Changes ◽  
Viscoelastic Behavior ◽  
Polymer Chains ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compression Data

AbstractThis study addresses issues with currently used bone adhesives, by producing novel glass based skeletal adhesives through modification of the base glass composition to include copper (Cu) and by characterizing each glass with respect to structural changes. Bioactive glasses have found applications in fields such as orthopedics and dentistry, where they have been utilized for the restoration of bone and teeth. The present work outlines the formation of flexible organic-inorganic polyacrylic acid (PAA) – glass hybrids, commercial forms are known as glass ionomer cements (GICs). Initial stages of this research will involve characterization of the Cu-glasses, significant to evaluate the properties of the resulting adhesives. Scanning electron microscopy (SEM) of annealed Cu glasses indicates the presence of partial crystallization in the glass. The structural analysis of the glass using Raman suggests the formation of CuO nanocrystals on the surface. X-ray diffraction (XRD) pattern and X-ray photoelectron spectroscopy (XPS) further confirmed the formation of crystalline CuO phases on the surface of the annealed Cu-glass. The setting reaction was studied using Fourier transform infrared spectroscopy (ATR-FTIR). The mechanical properties of the Cu containing adhesives exhibited gel viscoelastic behavior and enhanced mechanical properties when compared to the control composition. Compression data indicated the Cu glass adhesives were efficient at energy dissipation due to the reversible interactions between CuO nano particles and PAA polymer chains.

Study of three different families of water-soluble copolymers: synthesis, characterization and viscoelastic behavior of semidilute solutions of polymers prepared by solution polymerization

Polymer ◽  
2004 ◽  
Vol 45 (6) ◽  
pp. 1993-2000 ◽  
Author(s):  
Enrique J. Jiménez-Regalado ◽  
Gregorio Cadenas-Pliego ◽  
Marissa Pérez-Álvarez ◽  
Yessica Hernández-Valdez
Keyword(s):  
Viscoelastic Behavior ◽  
Water Soluble ◽  
Solution Polymerization ◽  
Semidilute Solutions

scholarly journals Interplay of entanglement and association effects on the dynamics of semidilute solutions of multisticker polymer chains

2017 ◽  
Vol 61 (6) ◽  
pp. 1231-1241 ◽  
Author(s):  
Maksim E. Shivokhin ◽  
Tetsuharu Narita ◽  
Laurence Talini ◽  
Axel Habicht ◽  
Sebastian Seiffert ◽  
...  
Keyword(s):  
Polymer Chains ◽  
Semidilute Solutions

Energy Transfer in Labeled Polymer Chains in Semidilute Solutions

1977 ◽  
Vol 10 (4) ◽  
pp. 862-864 ◽  
Author(s):  
I. Ohmine ◽  
R. Silbey ◽  
J. M. Deutch
Keyword(s):  
Energy Transfer ◽  
Polymer Chains ◽  
Semidilute Solutions

Dimensions of Polymer Chains in Critical Semidilute Solutions

1997 ◽  
Vol 78 (4) ◽  
pp. 686-688 ◽  
Author(s):  
Yu. B. Melnichenko ◽  
G. D. Wignall
Keyword(s):  
Polymer Chains ◽  
Semidilute Solutions

Modeling fracture in rate-dependent polymer networks: A quasicontinuum approach

2021 ◽  
pp. 1-22
Author(s):  
Ahmed Ghareeb ◽  
Ahmed Elbanna
Keyword(s):  
Adaptive Mesh Refinement ◽  
Polymer Networks ◽  
Viscoelastic Behavior ◽  
Adaptive Mesh ◽  
Soft Materials ◽  
Polymer Chains ◽  
Loading Rates ◽  
Viscous Forces ◽  
Rate Dependent ◽  
Bond Breakage

Abstract Soft materials, such as rubber and gels, exhibit rate-dependent response where the stiffness, strength and fracture patterns depend largely on loading rates. Thus, accurate modeling of the mechanical behavior requires accounting for different sources of rate-dependence such as the intrinsic viscoelastic behavior of the polymer chains and the dynamic bond breakage and formation mechanism. In this chapter, we extend the QC approach presented in Ghareeb and Elbanna [Journal of the Mechanics and Physics of Solids, 137, 103819 (2020)] to include ratedependent behavior of polymer networks. We propose a homogenization rule for the viscous forces in the polymer chains and update the adaptive mesh refinement algorithm to account for dynamic bond breakage. Then, we use nonlinear finite element framework with predictorcorrector scheme to solve for the nodal displacements and velocities. We demonstrate the accuracy of the method by verifying it against fully discrete simulations for different examples of network structures and loading conditions. We further use the method to investigate the effects of the loading rates on the fracture characteristics of networks with different ratedependent parameters. Finally, We discuss the implications of the extended method for multiscale analysis of fracture in rate-dependent polymer networks.

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