Understanding conformational and dynamical evolution of semiflexible polymers in shear flow

Soft Matter ◽  
2019 ◽  
Vol 15 (31) ◽  
pp. 6353-6361 ◽  
Author(s):  
Xiangxin Kong ◽  
Yingchun Han ◽  
Wenduo Chen ◽  
Fengchao Cui ◽  
Yunqi Li
Keyword(s):  
Shear Strength ◽  
Shear Flow ◽  
Dynamical Evolution ◽  
Semiflexible Polymers ◽  
Flexible Polymers ◽  
Affine Deformation

At small and intermediate shear strength, flexible polymers show a quasi-affine deformation while semiflexible ones are initially unfolded from the center.

scholarly journals Comparison of Conformational Phase Behavior for Flexible and Semiflexible Polymers

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3013
Author(s):  
Dilimulati Aierken ◽  
Michael Bachmann
Keyword(s):  
Inflection Point ◽  
High Accuracy ◽  
Bending Stiffness ◽  
Random Coil ◽  
Replica Exchange ◽  
Semiflexible Polymers ◽  
Flexible Polymers ◽  
First Order ◽  
Replica Exchange Monte Carlo ◽  
The Impact

We employ the recently introduced generalized microcanonical inflection point method for the statistical analysis of phase transitions in flexible and semiflexible polymers and study the impact of the bending stiffness upon the character and order of transitions between random-coil, globules, and pseudocrystalline conformations. The high-accuracy estimates of the microcanonical entropy and its derivatives required for this study were obtained by extensive replica-exchange Monte Carlo simulations. We observe that the transition behavior into the compact phases changes qualitatively with increasing bending stiffness. Whereas the Θ collapse transition is less affected, the first-order liquid-solid transition characteristic for flexible polymers ceases to exist once bending effects dominate over attractive monomer-monomer interactions.

scholarly journals Semiflexible polymer scaffolds: an overview of conjugation strategies

2021 ◽  
Author(s):  
Lotte Gerrits ◽  
Roel Hammink ◽  
Paul H. J. Kouwer
Keyword(s):  
Semiflexible Polymers ◽  
Polymer Scaffolds ◽  
Flexible Polymers ◽  
Semiflexible Polymer

Semiflexible polymers play an important role in nature and possess remarkable properties that renders them efficient scaffolds. While flexible polymers coil up, semiflexible polymers are rigid enough to retain a...

Dynamics of individual flexible polymers in a shear flow

Nature ◽  
10.1038/21148 ◽  
1999 ◽  
Vol 399 (6736) ◽  
pp. 564-566 ◽  
Author(s):  
Philip LeDuc ◽  
Charbel Haber ◽  
Gang Bao ◽  
Denis Wirtz
Keyword(s):  
Shear Flow ◽  
Flexible Polymers

scholarly journals Conformational and Dynamical Evolution of Block Copolymers in Shear Flow

2020 ◽  
Author(s):  
Xiang-Xin Kong ◽  
Wen-Duo Chen ◽  
Feng-Chao Cui ◽  
Yun-Qi Li
Keyword(s):  
Block Copolymers ◽  
Shear Flow ◽  
Dynamical Evolution

Intrinsic viscosity of flexible polymers in unbounded and bounded Newtonian shear flow

1991 ◽  
Vol 24 (19) ◽  
pp. 5351-5356 ◽  
Author(s):  
J. H. Van Vliet ◽  
G. Ten Brinke
Keyword(s):  
Shear Flow ◽  
Intrinsic Viscosity ◽  
Flexible Polymers

scholarly journals Self-organization in suspensions of end-functionalized semiflexible polymers under shear flow

2015 ◽  
Vol 143 (24) ◽  
pp. 243117 ◽  
Author(s):  
Jin Suk Myung ◽  
Roland G. Winkler ◽  
Gerhard Gompper
Keyword(s):  
Shear Flow ◽  
Self Organization ◽  
Semiflexible Polymers

In Situ Dynamics of Concentrated DNA Molecules in a Shear Flow

1999 ◽  
Author(s):  
Philip LeDuc ◽  
Bryan Pfister ◽  
Yangqing Xu ◽  
Denis Wirtz ◽  
Gang Bao
Keyword(s):  
Shear Flow ◽  
Conformational Changes ◽  
Flow Direction ◽  
Polymer Concentration ◽  
Polymer Dynamics ◽  
Dna Molecules ◽  
Flexible Polymers ◽  
Shear Rates ◽  
Dna Solutions

Abstract Polymer dynamics has been studied for many years because of its importance in many areas including materials, mechanics, biology, and medicine (Munk, 1989; Hoffman, et al., 1984). The dynamics of macromolecules in shear flow has been studied using light scattering and birefringence, but the effect of shear on the dynamics of individual polymers is not well understood (Doi & Edwards, 1986; de Gennes, 1991; de Gennes, 1997). Recently we studied the conformational changes of DNA molecules under shear in dilute concentration (LeDuc et al., 1998). Here we report the observations of the dynamics of fluorescently-labeled DNA molecules in a shear flow with increased concentration. Under a controlled shear flow, these flexible polymers exhibit various extended conformations, which range from parallel to perpendicular in orientation when compared to the flow direction. The amount of stretching that occurs in these experiments is found to be less than that for the dilute concentrations of the DNA solutions. Further, the stretching of the molecular solutions is found even at shear rates much smaller than the inverse of the relaxation time of the molecule. The in situ observations also reveal the effect of polymer concentration on the entanglement of macromolecules. These results provide insight into the behavior of individual and concentrated polymer molecules under shear and help further development of models for polymer dynamics (Perkins, et al., 1994; Smith, et al., 1992; Wirtz, 1995).

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