Fully Biobased Elastomer Composites with Mechanically Robust, Reprocessable, and Biocompatible Properties

2021 ◽  
Author(s):  
Shizhen Zhao ◽  
Hongkun Yang ◽  
Genlai Dong ◽  
Dong Wang ◽  
Thomas P. Russell
Keyword(s):  
Elastomer Composites

Studying changes in the electrical resistance of carbon-nanotubes-modified elastomers during their compression, stretching and torsion

2019 ◽  
pp. 128-138
Author(s):  
V. S. Yagubov ◽  
A. V. Shchegolkov ◽  
A. V. Shchegolkov ◽  
N. R. Memetov
Keyword(s):  
Composite Material ◽  
Smart Materials ◽  
Electrical Resistance ◽  
Materials Science ◽  
Measuring System ◽  
Constant Current ◽  
Matrix Composition ◽  
Space Industry ◽  
Different Types ◽  
Elastomer Composites

Developing "smart" materials with improved both structural and functional characteristics is one of the promising areas of materials science. Measuring the electrical resistance of CNTs-modified (various mass contents) polymers and in particular, elastomers during performing several tests (compression, stretching, and torsion) at a constant current is relevant in electrical engineering, mechanical engineering, aviation, and space industry. Changes in the elastomer shape under different types of testing lead to the destruction of macromolecules and the structuring of the material as a whole. Therefore, it is important to study the effect of CNTsbased modifying fillers on the elastomer. When compressing, stretching or twisting the nano-modified elastomer, along with the mutual movement of its macromolecular fragments and aggregates, the modifier particles also move, which generally determines the transport of electrons in the resulting structure and affects the physical and mechanical parameters of the composite material. To conduct studies, elastomers containing different amounts of a CNTs-based modifying filler were prepared. To investigate and elucidate relevant dependencies, a measuring system (MS) was constructed, which makes it possible to determine electrical resistance values of the composite material with different CNTs contents in the polymer matrix composition exposed to various mechanical loads. Basing the research results, it was established that the electrical resistance of the elastomer composites modified with 1.0–2.5 wt.% CNTs decreases when compressing from 0 to 100 N, whereas when the compression force ranges from 100 to 350 N, the electrical resistance remains unchanged. When the elastomer composites modified with 2–2.5 wt.% CNTs were stretched by 30–40 %, the electrical resistance was found to increase from 5·103 to 1.9·107 Ω.

Microstructure and properties of cerium oxide/polyurethane elastomer composites

Rare Metals ◽  
2021 ◽  
Author(s):  
An Xie ◽  
Shen-Wei Mao ◽  
Tian-Jiang Chen ◽  
Hui Yang ◽  
Ming Zhang
Keyword(s):  
Cerium Oxide ◽  
Polyurethane Elastomer ◽  
Microstructure And Properties ◽  
Elastomer Composites

Magnetic Particle Reinforced Elastomer Composites for Additive Manufacturing

2021 ◽  
pp. 1-1
Author(s):  
Jungjin Park ◽  
Andrew Becnel ◽  
Alison B. Flatau ◽  
Norman Wereley
Keyword(s):  
Additive Manufacturing ◽  
Magnetic Particle ◽  
Elastomer Composites

The Mechanical Behavior of Short-Fiber-Elastomer Composites

1976 ◽  
Vol 49 (5) ◽  
pp. 1167-1181 ◽  
Author(s):  
A. Y. Coran ◽  
P. Hamed ◽  
L. A. Goettler
Keyword(s):  
Test Piece ◽  
Composite Plates ◽  
Short Fiber ◽  
Strength Properties ◽  
Unidirectional Composite ◽  
Short Fibers ◽  
Principal Stresses ◽  
Elastomer Composites ◽  
Ultimate Limit ◽  
Time Of Failure

Abstract The measured elastic and strength properties of angle-ply composites of short fibers and rubber depend on test-piece geometry. In general, higher tensile moduli and strengths are obtained when plies are both thin and wide. Once the effects of test-piece geometry are taken into account, elastic properties can be calculated as functions of the properties of a single ply. Classical compliance transformation equations can be used. However, because of the invariance of shear modulus in aligned composites, the tensor transformation equations are somewhat simplified. Tensile strengths of off-axis unidirectional composite plates and balanced-angle plies can be fitted by Hill's criterion. Unidirectional composites tend to fail in the weakest mode, depending on the angle of stress, but laminating causes all principal stresses in a ply to be near their ultimate limit at the time of failure.

Dielectric and microwave properties of elastomer composites loaded with carbon-silica hybrid fillers

2015 ◽  
Vol 133 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Ahmed A. Al-Ghamdi ◽  
Omar A. Al-Hartomy ◽  
Falleh R. Al-Solamy ◽  
Nikolay Dishovsky ◽  
Mihail Mihaylov ◽  
...  
Keyword(s):  
Microwave Properties ◽  
Hybrid Fillers ◽  
Elastomer Composites ◽  
Silica Hybrid

Effect of Triclosan on Self-Assembly of Alkyl Ammonium Surfactants Adsorbed within Montmorillonite Galleries in Silicone Elastomer Composites

2014 ◽  
Vol 338 (1) ◽  
pp. 45-53
Author(s):  
Christopher M. Liauw ◽  
Rebecca L. Taylor ◽  
Lindsey J. Munro ◽  
Arthur N. Wilkinson ◽  
Onanong Cheerarot
Keyword(s):  
Self Assembly ◽  
Silicone Elastomer ◽  
Elastomer Composites ◽  
Alkyl Ammonium

FORC analysis of magnetically soft microparticles embedded in a polymeric elastic environment

2022 ◽  
Author(s):  
Dmitry Yu Borin ◽  
Mikhail V Vaganov
Keyword(s):  
Particle Concentration ◽  
Magnetic Hysteresis ◽  
Magnetic Response ◽  
Soft Matrix ◽  
First Order ◽  
Matrix Elasticity ◽  
Intrinsic Coercivity ◽  
The Matrix ◽  
Soft Particles ◽  
Elastomer Composites

Abstract First-order reversal curve (FORC) analysis allows one to investigate composite magnetic materials by decomposing the magnetic response of a whole sample into individual responses of the elementary objects comprising the sample. In this work, we apply this technique to analysing silicone elastomer composites reinforced with ferromagnetic microparticles possessing low intrinsic coercivity. Even though the material of such particles does not demonstrate significant magnetic hysteresis, the soft matrix of the elastomers allows for the translational mobility of the particles and enables their magnetomechanical hysteresis which renders into a wasp-waisted major magnetization loop of the whole sample. It is demonstrated that the FORC diagrams of the composites contain characteristic wing features arising from the collective hysteretic magnetization of the magnetically soft particles. The influence of the matrix elasticity and particle concentration on the shape of the wing feature is investigated, and an approach to interpreting experimental FORC diagrams of the magnetically soft magnetoactive elastomers is proposed. The experimental data are in qualitative agreement with the results of the simulation of the particle magnetization process obtained using a model comprised of two magnetically soft particles embedded in an elastic environment.

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