Morphological characteristics of viscose rayon cord fibre containing carbon black

1974 ◽  
Vol 6 (1) ◽  
pp. 80-82
Author(s):  
I. I. Krasova ◽  
G. M. Terekhova ◽  
N. V. Mikhailov ◽  
L. N. Panova
Keyword(s):  
Carbon Black ◽  
Viscose Rayon ◽  
Morphological Characteristics ◽  
Cord Fibre

New, Highly Structured Carbon Black of the OMCARB Series for Reducing the Hysteresis in Rubber. Part 1. Features of the Structure and Properties of Carbon Black

2016 ◽  
Vol 43 (12) ◽  
pp. 17-22
Author(s):  
G.V. Moiseevskaya ◽  
G.I. Razd'yakonova ◽  
A.A. Petin ◽  
E.A. Strizhak
Keyword(s):  
Carbon Black ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Structural Data ◽  
Structure And Properties ◽  
Elastomeric Materials ◽  
Rubber Part ◽  
Average Size ◽  
Branched Structure ◽  
And Chemical Properties

The aim of this work was to study the properties of carbon black CH85 of the OMCARB series and to compare them with the properties of standard carbon blacks N339 and N234. The morphological characteristics, the size distribution of the globules and aggregates, the surface area, the proportion of micropore area, the degree of branching of aggregates, and also the mechanical and chemical properties were measured and calculated. The average size of the aggregates of CH85 is greater than that of N339 and N234, and the aggregates have a more open and branched structure. The iodine adsorption by CH85 is practically the same as that by N339 and lower than that by N234. The low-hysteresis index calculated on the basis of structural data is much better for CH85. This opens up the possibility of using this type of carbon black for the development of elastomeric materials with low hysteresis.

Electrically Conductive Fibers/Yarns with Sensing Behavior from PVA and Carbon Black

2011 ◽  
Vol 462-463 ◽  
pp. 18-23 ◽  
Author(s):  
P. Xue ◽  
Xiao Ming Tao ◽  
Keun Hoo Park
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Morphological Characteristics ◽  
Processing Technique ◽  
Wet Spinning ◽  
Coating Process ◽  
Textile Processing ◽  
Electrically Conductive ◽  
Conductive Yarns ◽  
Conductive Fibers

In this study, electrical conductive yarns were prepared by wet-spinning technique and a physically coating process. Carbon black (CB) was used to make the fiber gaining electrical conductivity. The electrical conductivity and morphological characteristics of the developed conductive fibres were studied and compared. The results show that linear resistivity of the produced conductive yarns ranges from 1 to a few hundred kΩ per centimeter, mainly depending on processing technique and substrate fibers. It is also shown that the physically coating processes will not significantly affect the mechanical properties of the fibers and yarns. These conductive yarns are lightweight, durable, flexible, and cost competitive; and able to be crimped and subjected to textile processing without any difficulty.

The method of spinning as a factor in the morphological characteristics of textured viscose rayon

1975 ◽  
Vol 6 (4) ◽  
pp. 403-405
Author(s):  
L. V. Ivanova ◽  
E. M. Mogilevskii ◽  
I. G. Shimko ◽  
S. P. Lipinskii ◽  
V. I. Merzlyakova ◽  
...  
Keyword(s):  
Viscose Rayon ◽  
Morphological Characteristics

Influence of Temperature on the Tensile Strength of Carbon Filled Vulcanizates

1971 ◽  
Vol 44 (3) ◽  
pp. 728-743 ◽  
Author(s):  
R. W. Sambrook
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Molecular Mobility ◽  
Substantial Reduction ◽  
Morphological Characteristics ◽  
Influence Of Temperature ◽  
Mechanical Hysteresis ◽  
Influence Of Temperature On ◽  
Increasing Temperature ◽  
High Structure

Abstract Despite undergoing a substantial reduction with increasing temperature the presence of carbon black added to the strength of both natural and styrenebutadiene rubber at temperatures up to 185° C. The magnitude of reinforcement was primarily dependent upon filler surface area although at the higher temperatures when this dependence is not so marked both high structure and particle activity appear advantageous. No theory of carbon black reinforcement can reasonably ignore the morphological characteristics of the material whose action it is attempting to explain. The concept of within aggregate voids, and occluded rubber envisaged by Medalia and used in this paper to describe the effect of fillers on rubber modulus, provides an interesting molecular meaning to the effects that have hitherto been explained on the basis of “shell” theories. Occluded rubber might reasonably be viewed as a type of shell since it undoubtedly represents a polymer zone in which molecular mobility is restricted. Furthermore the view of rubber being pulled from the interstices of an aggregate, manifestly a stress softening action, provides a source of plastic flow and mechanical hysteresis in the region of the aggregate—an apparent prerequisite for reinforcement.

Synthesis of SiC Nano-Powders by Solid-Vapor Reaction

2006 ◽  
Vol 317-318 ◽  
pp. 211-214
Author(s):  
Seoung Soo Lee ◽  
Jae Won Kim ◽  
Yeon Gil Jung ◽  
Je Hyun Lee ◽  
Jae Hong Yoon ◽  
...  
Keyword(s):  
Carbon Black ◽  
Direct Synthesis ◽  
Morphological Characteristics ◽  
Argon Atmosphere ◽  
X Ray Diffraction ◽  
Qualitative Properties ◽  
Reaction Method ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Silicon carbide (SiC) nano-powders are successfully synthesized by a reaction between carbon nano-powders (carbon black) and SiO gas at 1300°C for 9 hrs in dynamic argon atmosphere (flow rate; 400 cm3 min-1), using the solid-vapor reaction method. The particle size of synthesized SiC nano-powders is below 40 nm and the shape is uniform. Unexpectedly, SiC nano-fibers are also coexisted in the SiC nano-powders. The quantitative and qualitative properties of the SiC nanopowders and nano-fibers are analyzed by scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD). Carbon residuals removed by heating over 700°C in air are estimated by thermogravimetry analysis (TGA). It is found that the SiC nanopowders are easily produced by direct synthesis via the solid-vapor reaction method. The morphological characteristics of the resulting SiC nano-powders are dependent upon the morphology of carbon black used as precursor.

Elimination of surfactants from viscose rayon cord fibre

1973 ◽  
Vol 5 (2) ◽  
pp. 217-219
Author(s):  
E. P. Efremova ◽  
N. L. Zubakhina ◽  
M. E. Shor ◽  
O. D. Chanchikova
Keyword(s):  
Viscose Rayon ◽  
Cord Fibre

A Simple Methodology for the Modeling of Carbon Black Aggregate Structure

1996 ◽  
Vol 69 (1) ◽  
pp. 8-14 ◽  
Author(s):  
Qi Li ◽  
Ica Manas-Zloczower ◽  
Donald L. Feke
Keyword(s):  
Fractal Dimension ◽  
Carbon Black ◽  
Extreme Points ◽  
Morphological Characteristics ◽  
Sticking Probability ◽  
Proper Choice ◽  
Aggregate Structure ◽  
Primary Particles ◽  
Commercial Carbon ◽  
Standard Reaction

Abstract A procedure for modeling some morphological characteristics of carbon black aggregates is presented. The method uses a standard reaction limited aggregation algorithm to predict the location of the centers of primary particles within an aggregate. The shape of the aggregate is determined by drawing simple linear links between extreme points of primary particles centered on these loci. Analysis of the particle distribution function computed from the simulated structure leads to definitions of the interior and periphery of the aggregate structure. Direct comparisons between simulated aggregates and two commercial carbon blacks are presented to illustrate the usefulness of the approach. The perimeter fractal dimension of simulated aggregates can be made to match the perimeter fractal dimension of the commercial carbon black aggregates through proper choice of the sticking probability in the simulation algorithm. With this proper choice of sticking probability, the relative amounts of voids in the periphery and interior of the simulated aggregate correspond to relative amounts of filled and unfilled voids in actual aggregates that have been soaked for extended periods of time with processing fluids.

A Preparation of High Resolution Standards for Electron Microscopy. Part II

1971 ◽  
Vol 29 ◽  
pp. 160-161
Author(s):  
Akira Tanaka ◽  
David F. Harling
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Carbon Black ◽  
Single Crystal ◽  
Dark Field ◽  
Graphitized Carbon Black ◽  
Graphitized Carbon ◽  
Dark Field Imaging ◽  
Crystal Films ◽  
Micro Holes

In the previous paper, the author reported on a technique for preparing vapor-deposited single crystal films as high resolution standards for electron microscopy. The present paper is intended to describe the preparation of several high resolution standards for dark field microscopy and also to mention some results obtained from these studies. Three preparations were used initially: 1.) Graphitized carbon black, 2.) Epitaxially grown particles of different metals prepared by vapor deposition, and 3.) Particles grown epitaxially on the edge of micro-holes formed in a gold single crystal film.The authors successfully obtained dark field micrographs demonstrating the 3.4Å lattice spacing of graphitized carbon black and the Au single crystal (111) lattice of 2.35Å. The latter spacing is especially suitable for dark field imaging because of its preparation, as in 3.), above. After the deposited film of Au (001) orientation is prepared at 400°C the substrate temperature is raised, resulting in the formation of many square micro-holes caused by partial evaporation of the Au film.

Cell Wall Ultrastructure in Three Strains of a Cariogenic Streptococcus

1971 ◽  
Vol 29 ◽  
pp. 338-339
Author(s):  
M. J. Kramer ◽  
Alan L. Coykendall
Keyword(s):  
Cell Wall ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Genetic Heterogeneity ◽  
Morphological Characteristics ◽  
Electron Microscopic ◽  
Dna Reassociation ◽  
Wall Ultrastructure

During the almost 50 years since Streptococcus mutans was first suggested as a factor in the etiology of dental caries, a multitude of studies have confirmed the cariogenic potential of this organism. Streptococci have been isolated from human and animal caries on numerous occasions and, with few exceptions, they are not typable by the Lancefield technique but are relatively homogeneous in their biochemical reactions. An analysis of the guanine-cytosine (G-C) composition of the DNA from strains K-1-R, NCTC 10449, and FA-1 by one of us (ALC) revealed significant differences and DNA-DNA reassociation experiments indicated that genetic heterogeneity existed among the three strains. The present electron microscopic study had as its objective the elucidation of any distinguishing morphological characteristics which might further characterize the respective strains.

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