scholarly journals Effects of chain structure on damping property and local dynamics of phenyl silicone rubber: Insights from experiment and molecular simulation

2021 ◽  
Vol 93 ◽  
pp. 106885
Author(s):  
Lin Zhu ◽  
Shigui Zhao ◽  
Chen Zhang ◽  
Xiao Cheng ◽  
Jinghao Hao ◽  
...  
Keyword(s):  
Molecular Simulation ◽  
Silicone Rubber ◽  
Chain Structure ◽  
Local Dynamics ◽  
Damping Property

Research on Thermal Aging Characteristics and Mechanism of the Silicon Rubber Insulation Layer of Cable Joints

2019 ◽  
Vol 960 ◽  
pp. 161-166 ◽  
Author(s):  
Yong Lan Li ◽  
Man Shi Qiu ◽  
Jia Wei Ma ◽  
Guo Wen Kuang ◽  
Nai Kui Gao ◽  
...  
Keyword(s):  
Mass Loss ◽  
Silicone Rubber ◽  
Thermal Aging ◽  
Mass Loss Rate ◽  
Chain Structure ◽  
Decomposition Temperature ◽  
Insulation Layer ◽  
Initial Decomposition Temperature ◽  
Theoretical Support ◽  
Degradation Reaction

In order to solve the thermal aging problem of silicone rubber insulation layer of 220 kV integral prefabricated cable joints, the mass loss and thermal gravimetric (TG) were tested. The thermal aging mechanism of thermal degradation reaction of silicone rubber molecular chains was analyzed by gel content test and infrared spectrum test (IR). The results showed that the cross-linked network of the molecular chain structure gradually deteriorates, resulting in the increase of mass loss rate and the decrease of thermal stability. The results also showed that the increase of dual peak of differential thermal weight (DTG), the decrease of initial decomposition temperature and the remaining mass. With increasing aging temperature and aging time, the aging would be accelerated. These properties could reflect the degree of thermal aging of silicone rubber insulation layer. The results could also provide theoretical support for the preparation, operation and maintenance for silicone rubber cable joints.

Molecular Simulation of Adsorption Mechanism of Silicone Rubber Interfacial Systems

2014 ◽  
Vol 1023 ◽  
pp. 15-18
Author(s):  
Qiang Yang ◽  
Xiao Ping Wen ◽  
Chao Ming Sun ◽  
Guang Ping Tang
Keyword(s):  
Stainless Steel ◽  
Molecular Simulation ◽  
Silicone Rubber ◽  
Adsorption Mechanism ◽  
Simulation Method ◽  
Energy Calculation ◽  
Adsorption Effect ◽  
Adsorption Mechanisms ◽  
Calculation Results ◽  
Simulation Results

The adsorption mechanisms of silicone rubber (SR)-stainless steel (SS) interfacial system and silicone rubber-HMX interfacial system were studied by molecular simulation method in the present paper. The molecular simulation results revealed that silicone rubber-stainless steel interface has obvious adsorption effect, while silicone rubber-HMX interface has certain adsorption effect. The systematic potential energy calculation results revealed that coulomb interaction and van de waals interaction might be the major microscopic adsorption mechanism for silicone rubber-stainless steel interfacial system and silicone rubber-HMX interfacial system.

scholarly journals Tetraphenylphenyl-modified damping additives for silicone rubber: Experimental and molecular simulation investigation

2021 ◽  
Vol 202 ◽  
pp. 109551
Author(s):  
Lin Zhu ◽  
Xin Chen ◽  
Ruirui Shi ◽  
Hao Zhang ◽  
Rui Han ◽  
...  
Keyword(s):  
Molecular Simulation ◽  
Silicone Rubber

Local Dynamics of Stereoregular PMMAs Using Molecular Simulation

2002 ◽  
Vol 35 (3) ◽  
pp. 722-726 ◽  
Author(s):  
A. Soldera ◽  
Y. Grohens
Keyword(s):  
Molecular Simulation ◽  
Local Dynamics

Computing cell tractions from particle displacements on silicone rubber substrata

1994 ◽  
Vol 52 ◽  
pp. 162-163
Author(s):  
Tim Oliver ◽  
Akira Ishihara ◽  
Ken Jacobsen ◽  
Micah Dembo
Keyword(s):  
Plane Stress ◽  
Linear Elasticity ◽  
Silicone Rubber ◽  
Mathematical Analysis ◽  
Elastic Recovery ◽  
Video Images ◽  
Cell Traction Forces ◽  
Latex Beads ◽  
Cell Traction ◽  
Better Than

In order to better understand the distribution of cell traction forces generated by rapidly locomoting cells, we have applied a mathematical analysis to our modified silicone rubber traction assay, based on the plane stress Green’s function of linear elasticity. To achieve this, we made crosslinked silicone rubber films into which we incorporated many more latex beads than previously possible (Figs. 1 and 6), using a modified airbrush. These films could be deformed by fish keratocytes, were virtually drift-free, and showed better than a 90% elastic recovery to micromanipulation (data not shown). Video images of cells locomoting on these films were recorded. From a pair of images representing the undisturbed and stressed states of the film, we recorded the cell’s outline and the associated displacements of bead centroids using Image-1 (Fig. 1). Next, using our own software, a mesh of quadrilaterals was plotted (Fig. 2) to represent the cell outline and to superimpose on the outline a traction density distribution. The net displacement of each bead in the film was calculated from centroid data and displayed with the mesh outline (Fig. 3).

Video-microscopic measurement of cell-substratum traction forces generated by locomoting keratocytes

1993 ◽  
Vol 51 ◽  
pp. 188-189
Author(s):  
Tim Oliver ◽  
Michelle Leonard ◽  
Juliet Lee ◽  
Akira Ishihara ◽  
Ken Jacobson
Keyword(s):  
Silicone Rubber ◽  
Molecular Motors ◽  
Video Frame ◽  
Traction Forces ◽  
Cell Traction Forces ◽  
Latex Beads ◽  
Cell Traction ◽  
Local Cell ◽  
Microscopic Measurement ◽  
Kinetics Of

We are using video-enhanced light microscopy to investigate the pattern and magnitude of forces that fish keratocytes exert on flexible silicone rubber substrata. Our goal is a clearer understanding of the way molecular motors acting through the cytoskeleton co-ordinate their efforts into locomotion at cell velocities up to 1 μm/sec. Cell traction forces were previously observed as wrinkles(Fig.l) in strong silicone rubber films by Harris.(l) These forces are now measureable by two independant means.In the first of these assays, weakly crosslinked films are made, into which latex beads have been embedded.(Fig.2) These films report local cell-mediated traction forces as bead displacements in the plane of the film(Fig.3), which recover when the applied force is released. Calibrated flexible glass microneedles are then used to reproduce the translation of individual beads. We estimate the force required to distort these films to be 0.5 mdyne/μm of bead movement. Video-frame analysis of bead trajectories is providing data on the relative localisation, dissipation and kinetics of traction forces.

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