Chain contraction at the critical overlap concentration

Polymer ◽  
2006 ◽  
Vol 47 (18) ◽  
pp. 6257-6262 ◽  
Author(s):  
Lech Gmachowski
Keyword(s):  
Chain Contraction ◽  
Overlap Concentration

Observation of Polymer Chain Contraction near the Overlap Concentration

2005 ◽  
Vol 38 (22) ◽  
pp. 9393-9395 ◽  
Author(s):  
T. P. DiNoia ◽  
I.-H. Park ◽  
M. A. McHugh ◽  
J. H. van Zanten
Keyword(s):  
Polymer Chain ◽  
Chain Contraction ◽  
Overlap Concentration

scholarly journals Contraction of Entangled Polymers After Large Step Shear Deformations in Slip-Link Simulations

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 370 ◽  
Author(s):  
Yuichi Masubuchi
Keyword(s):  
Dynamics Simulation ◽  
Uniaxial Deformation ◽  
Single Chain ◽  
Orientational Relaxation ◽  
Entangled Polymers ◽  
Constraint Release ◽  
Large Step ◽  
Entangled Polymer ◽  
Convective Constraint Release ◽  
Chain Contraction

Although the tube framework has achieved remarkable success to describe entangled polymer dynamics, the chain motion assumed in tube theories is still a matter of discussion. Recently, Xu et al. [ACS Macro Lett. 2018, 7, 190–195] performed a molecular dynamics simulation for entangled bead-spring chains under a step uniaxial deformation and reported that the relaxation of gyration radii cannot be reproduced by the elaborated single-chain tube model called GLaMM. On the basis of this result, they criticized the tube framework, in which it is assumed that the chain contraction occurs after the deformation before the orientational relaxation. In the present study, as a test of their argument, two different slip-link simulations developed by Doi and Takimoto and by Masubuchi et al. were performed and compared to the results of Xu et al. In spite of the modeling being based on the tube framework, the slip-link simulations excellently reproduced the bead-spring simulation result. Besides, the chain contraction was observed in the simulations as with the tube picture. The obtained results imply that the bead-spring results are within the scope of the tube framework whereas the failure of the GLaMM model is possibly due to the homogeneous assumption along the chain for the fluctuations induced by convective constraint release.

Water dynamics and self-assembly of single-chain nanoparticles in concentrated solutions

Soft Matter ◽  
2020 ◽  
Vol 16 (42) ◽  
pp. 9738-9745
Author(s):  
Beatriz Robles-Hernández ◽  
Edurne González ◽  
José A. Pomposo ◽  
Juan Colmenero ◽  
Ángel Alegría
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Water Dynamics ◽  
Nano Particles ◽  
Random Copolymers ◽  
Core Shell ◽  
Dielectric Studies ◽  
Single Chain ◽  
Concentrated Solutions ◽  
Overlap Concentration

Dielectric studies on water dynamics in aqueous solutions of amphiphilic random copolymers confirm the self-assembly into globular like core–shell single-chain nano-particles (SCNPs) at concentrations well above the overlap concentration.

Sweetness perception in protein-polysaccharide beverages is not explained by viscosity or critical overlap concentration

2019 ◽  
Vol 94 ◽  
pp. 229-237 ◽  
Author(s):  
Ty B. Wagoner ◽  
Esra Çakır-Fuller ◽  
MaryAnne Drake ◽  
E. Allen Foegeding
Keyword(s):  
Overlap Concentration

Chain Contraction and Change in Entanglement Structure of Well-Entangled Polymer in Large Shearing Deformations

1995 ◽  
Vol 28 (14) ◽  
pp. 5154-5155 ◽  
Author(s):  
Yoshinobu Isono ◽  
Nobuyuki Ohashi ◽  
Toshio Kase
Keyword(s):  
Entangled Polymer ◽  
Chain Contraction ◽  
Entanglement Structure
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