Features of Obtaining Carbon Plastics Based on Superstructural Polymer Materials

2020 ◽  
Vol 869 ◽  
pp. 562-570
Author(s):  
Diana M. Khakulova ◽  
Kamila T. Shakhmurzova ◽  
Svetlana Yu. Khashirova
Keyword(s):  
Polymer Matrix ◽  
Adhesive Strength ◽  
Adhesive Contact ◽  
Polymer Materials ◽  
Inorganic Filler ◽  
Chemical Bonds ◽  
Carbon Plastics ◽  
Local Stresses ◽  
Carbon Fillers ◽  
High Adhesive Strength

The features of obtaining carbon plastics and specific solutions to problems associated with the compatibility of an inorganic filler and a polymer matrix, the formation of adhesive contact of carbon fillers due to the formation of chemical bonds, mechanical adhesions, local stresses and defects at the phase boundary are considered. Successful solutions are presented that provide high adhesive strength between the filler and the polymer matrix.

Corrosion-resistant composite germanium-based alloys coatings

2019 ◽  
pp. 103-109
Author(s):  
A. F. Vasiliev ◽  
E. A. Samodelkin ◽  
E. Yu. Geraschenkova ◽  
B. V. Farmakovsky
Keyword(s):  
Thermal Cycling ◽  
Adhesive Strength ◽  
Corrosion Resistant ◽  
Temperature Range ◽  
Powder Composition ◽  
High Adhesive Strength

The results of complex studies on the development of a powder composition Ge–Cr–Zr–Ce–WC, promising for the production of functional cold-resistant coatings by microplasma sputtering, are presented. The coating has high adhesive strength (more than 40 MPa) and microhardness (up to 10–12 GPa) and withstands repeated thermal cycling in the temperature range from –60 to 20°С.

Fabrication of Bioactive Organic Polymer by Using Apatite Nuclei-Contained Inorganic Binder

2008 ◽  
Vol 396-398 ◽  
pp. 433-436
Author(s):  
Takeshi Yabutsuka ◽  
Yuzo Inoue ◽  
Masayuki Shimada ◽  
Mitsuhiro Hibino ◽  
Takeshi Yao
Keyword(s):  
Adhesive Strength ◽  
Organic Polymer ◽  
Inorganic Binder ◽  
High Adhesive Strength

Apatite nuclei were dispersed in inorganic binder and the apatite nuclei-contained inorganic binder was coated on polyethyleneterephthalate plate. Hydroxyapatite was induced by the apatite nuclei dispersed in the binder and hydroxyapatite layer was formed on the surface of the substrate by soaking in SBF. The hydroxyapatite layer showed high adhesive strength to the substrate.

Study of the effect of the reinforcement direction on the identification of relaxation transitions of moisture-saturated carbon fiber VKU-25

2021 ◽  
Vol 87 (9) ◽  
pp. 38-43
Author(s):  
O. G. Ospennikova ◽  
P. S. Marakhovsky ◽  
N. N. Vorobyov ◽  
E. V. Nikolaev ◽  
A. I. Gulyaev ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Carbon Fiber ◽  
Polymer Matrix ◽  
Structural Parameters ◽  
Polymer Materials ◽  
Thermal Coefficient ◽  
Initial State ◽  
Relaxation Transitions

Thermodilatometric methods of analysis are used to study the structural parameters of polymer materials, however, when studying moisture-saturated compositions certain difficulties arise in their identification. The results of thermophysical tests of VKU-25 carbon fiber samples in the initial state and after moisture saturation are presented. It is shown that heat treatment of materials affects the recorded values of the glass transition temperature of the epoxy matrix. When the samples are exposed in water or above the water surface, the sorbate penetrates into the polymer at the same rate, which is confirmed by almost identical values of water absorption at the same exposure time. The estimates of the thermal coefficient of linear expansion (TCLE) of the samples in the range of 20 - 250°C are given. Moreover, it is shown that the glass transition temperature of the plasticized polymer matrix depends on the direction of fiber reinforcement. In the case of moisture-saturated carbon fiber (CF)heated to 210°C, the formation of main cracks occurs mainly at the fiber-matrix interface. The glass transition temperature (GTT) of the material in the dry state (176 - 177°C), appeared almost independent on the heating rate, whereas for water-saturated samples, GTT changes significantly and can be described by a polynomial of the 2nd order. After exposure of the carbon fiber under conditions of high temperature and humidity, two relaxation transitions corresponding to the systems occur in the polymer matrix: epoxidian oligomer— amine hardener and polyfunctional resin— amine hardener. The glass transition temperature is 132 and 159°C in the first and in the second, respectively. The results obtained can be used in the development of new polymer composite materials.

Development of Bioactive Titanium-Apatite Nuclei Composite

2007 ◽  
Vol 361-363 ◽  
pp. 709-712 ◽  
Author(s):  
Takeshi Yabutsuka ◽  
Mitsuhiro Hibino ◽  
Takeshi Yao
Keyword(s):  
Simulated Body Fluid ◽  
Adhesive Strength ◽  
Body Fluid ◽  
Apatite Layer ◽  
Mechanical Interlocking ◽  
Composite Surface ◽  
High Adhesive Strength

Apatite nuclei were precipitated in the pores of titanium in simulated body fluid (SBF) and titanium-apatite nuclei composite was obtained. Apatite was induced by the apatite nuclei inside the pores of the composite and apatite layer was formed on the composite surface by soaking in SBF. The apatite layer showed high adhesive strength to the composite due to a mechanical interlocking effect between the composite and the apatite.

scholarly journals A Review on the Fabrication of Electrospun Polymer Electrolyte Membrane for Direct Methanol Fuel Cell

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Hazlina Junoh ◽  
Juhana Jaafar ◽  
Muhammad Noorul Anam Mohd Norddin ◽  
Ahmad Fauzi Ismail ◽  
Mohd Hafiz Dzarfan Othman ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Matrix ◽  
Direct Methanol Fuel Cell ◽  
Proton Exchange ◽  
Nanocomposite Membrane ◽  
Inorganic Filler ◽  
Important Indicator ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Proton exchange membrane (PEM) is an electrolyte which behaves as important indicator for fuel cell’s performance. Research and development (R&D) on fabrication of desirable PEM have burgeoned year by year, especially for direct methanol fuel cell (DMFC). However, most of the R&Ds only focus on the parent polymer electrolyte rather than polymer inorganic composites. This might be due to the difficulties faced in producing good dispersion of inorganic filler within the polymer matrix, which would consequently reduce the DMFC’s performance. Electrospinning is a promising technique to cater for this arising problem owing to its more widespread dispersion of inorganic filler within the polymer matrix, which can reduce the size of the filler up to nanoscale. There has been a huge development on fabricating electrolyte nanocomposite membrane, regardless of the effect of electrospun nanocomposite membrane on the fuel cell’s performance. In this present paper, issues regarding the R&D on electrospun sulfonated poly (ether ether ketone) (SPEEK)/inorganic nanocomposite fiber are addressed.

Fabrication of Bioactive Apatite Nuclei Precipitated Polylactic Acid by Using Sandblasting Process

2013 ◽  
Vol 587 ◽  
pp. 165-170 ◽  
Author(s):  
Takeshi Yabutsuka ◽  
Hiroshi Mizuno ◽  
Takeshi Yao
Keyword(s):  
Particle Size ◽  
Polylactic Acid ◽  
Adhesive Strength ◽  
Average Particle Size ◽  
Average Particle ◽  
Mechanical Interlocking ◽  
Alumina Particles ◽  
High Adhesive Strength

Micropores were formed on the surface of polylactic acid (PLA) plate by doubled sandblasting process using alumina particles with 14.0 μm for average particle size as first process, then using the particles with 3.0 μm for average particle size as second process. Apatite Nucleus (AN) was precipitated in the pores. By these treatments, bioactive AN precipitated PLA was fabricated. Bioactivity of the AN precipitated PLA was examined by soaking in SBF and it was observed that hydroxyapatite was induced on the surface of the PLA within 1 d. High adhesive strength of hydroxyapatite layer was achieved due to a mechanical interlocking effect between hydroxyapatite formed in the micropores and the PLA plate.

Effect of whiskerization of a polymer matrix on the creep resistance of carbon plastics under tensile stress

1978 ◽  
Vol 10 (9) ◽  
pp. 1064-1068 ◽  
Author(s):  
G. M. Gunyaev ◽  
I. M. Makhmutov ◽  
T. G. Sorina ◽  
E. I. Stepanychev ◽  
A. I. Surgucheva ◽  
...  
Keyword(s):  
Tensile Stress ◽  
Polymer Matrix ◽  
Creep Resistance ◽  
Carbon Plastics
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