Elastomeric matrix-short fibers adhesion

1989 ◽  
Vol 10 (4) ◽  
pp. 256-260 ◽  
Author(s):  
L. Ibarra ◽  
C. Chamorro
Keyword(s):  
Short Fibers ◽  
Elastomeric Matrix

Investigating hollow corundum microspheres exfoliation of the elastomeric matrix

2019 ◽  
pp. 135-142
Author(s):  
N. V. Shadrinov ◽  
U. V. Evseeva
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscope ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Elastomeric Matrix ◽  
Atomic Force

The results of study of the influence of hollow corundum microspheres HCM-S (5–100 µm) and HCM-L (70–180 µm) on the properties of nitrile butadiene rubber BNKS-18 are presented. The dependence of elastomer resistance to abrasion impact and physic and mechanical properties on the dispersion and concentration of hollow corundum microspheres is shown. The process of hollow corundum microspheres exfoliation of the elastomeric matrix, which largely determines the change of physic and mechanical properties, has been studied by specially developed stretching device compatible with an atomic force microscope. The paper describes microspheres exfoliation which is conventionally divided into 3 stages.

LDH-doped electrospun short fibers enable dual drug loading and multistage release for chemotherapy of drug-resistant cancer cells

2021 ◽  
Author(s):  
Yupei Ma ◽  
Du Li ◽  
Yunchao Xiao ◽  
Zhijun OuYang ◽  
Mingwu Shen ◽  
...  
Keyword(s):  
Multidrug Resistance ◽  
Cancer Cells ◽  
Cancer Chemotherapy ◽  
Side Effect ◽  
Drug Loading ◽  
Adverse Side Effect ◽  
Drug Resistant ◽  
Short Fibers ◽  
Dual Drug

Conventional cancer chemotherapy is facing difficulties in improving the bioavailability, overcoming the severe adverse side effect of chemotherapeutics and reversing the multidrug resistance of cancer cells. To address these challenges,...

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.

Rapid-Solidified Metallic Actuator Materials Developed by Electromagnetic Nozzleless Melt Spinning Method

1999 ◽  
Vol 604 ◽  
Author(s):  
Y. Furuya
Keyword(s):  
Shape Memory ◽  
Rapid Solidification ◽  
Melt Spinning ◽  
Material Design ◽  
Thin Plates ◽  
Molten Metals ◽  
Short Fibers ◽  
Crystal Anisotropy ◽  
Electro Magnetic ◽  
Ferromagnetic Shape Memory

AbstractElectro-magnetic nozzleless melt-spinning method was developed by combining the control of the flow down of the molten metals after electromagnetic float-melting(i.e. levitation) with rapid solidification by rotating roll. The metallurgical grain microstructures can be changed by rotating roll speed. It was confinned that the produced, intermetallic TiNi and NiAl system alloy thin plates showed the strong crystal anisotropy, higher shape memory functional properties than those of the conventionally processed melt-worked samples having its same origin. As new SMAs by using this method, ferromagnetic shape memory, FePd alloy having very large magnetostriction and super high temperature shape memory, RuTa alloy having the transformation over 1000°C were developed. Moreover, our recent study on the advanced rapid-solidification machine to produce many kinds of short fibers as well as ribbons is introduced. Finally, harmonic material design for sensor/actuator stacking composite system, namely “Smart Board” for aircraft structures will be introduced.

Crack Resistance Function Analysis of Flexible Short Fiber in Asphalt

2011 ◽  
Vol 243-249 ◽  
pp. 4182-4187
Author(s):  
Zhi Yong Ding ◽  
Jing Liang Dai ◽  
Bo Peng
Keyword(s):  
Mechanical Model ◽  
Function Analysis ◽  
Short Fiber ◽  
Calculation Model ◽  
Tensile Failure ◽  
Spherical Coordinates ◽  
Short Fibers ◽  
Flexible Fiber ◽  
Fiber Bridging ◽  
Resistance Function

after reasonably analyzing characteristics of flexible fiber reinforcement fragile material, the mechanical model of individual fiber is established while being pulled out from asphalt; the spherical coordinates is adopted to establish the calculation model for short fiber bridging stress evenly distributed in space to calculate the value of bridging stress generated by short fibers while asphalt is breaking; the fiber asphalt sample in big size is adopted to perform low temperature tensile failure test to practically measure bridging stress of short fiber; fit the calculated value and measured value of bridging stress by adjusting parameters in the calculation model to check the rationality of fiber bridging stress in calculation method and model.

Thermal, Mechanical and Magneto-Mechanical Characterization of Liquid Crystalline Elastomers Loaded with Iron Oxide Nanoparticles

2015 ◽  
Vol 1718 ◽  
pp. 3-7
Author(s):  
Stephany Herrera-Posada ◽  
Barbara O. Calcagno ◽  
Aldo Acevedo
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Liquid Crystalline ◽  
Molar Mass ◽  
Oxide Nanoparticles ◽  
Magnetic Actuation ◽  
Scanning Calorimetry ◽  
Elastomeric Matrix ◽  
Alternating Magnetic Fields

ABSTRACTLiquid crystalline elastomers (LCEs) are materials that reveal unusual mechanical, optical and thermal properties due to their molecular orientability characteristic of low molar mass liquid crystals while maintaining the mechanical elasticity distinctive of rubbers. As such, they are considered smart shape-changing responsive systems. In this work, we report on the preparation of magnetic sensitized nematic LCEs using iron oxide nanoparticles with loadings of up to 0.7 wt%. The resultant thermal and mechanical properties were characterized by differential scanning calorimetry, expansion/contraction experiments and extensional tests. The magnetic actuation ability was also evaluated for the neat elastomer and the composite with 0.5 wt% magnetic content, finding reversible contractions of up to 23% with the application of alternating magnetic fields (AMFs) of up to 48 kA/m at 300 kHz. Thus, we were able to demonstrate that the inclusion of magnetic nanoparticles yields LCEs with adjustable properties that can be tailored by changing the amount of particles embedded in the elastomeric matrix, which can be suitable for applications in actuation, sensing, or as smart substrates.

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