Improving Resistance‐Temperature Characteristic of Polyethylene/Carbon Black Composites by Poly(3,4‐Ethylenedioxythiophene)‐Functionalized Multilayer Graphene

2020 ◽  
Vol 221 (14) ◽  
pp. 2000144
Author(s):  
Guangfa Shi ◽  
Xiaomin Cai ◽  
Wenqiang Wang ◽  
Gengchao Wang
Keyword(s):  
Carbon Black ◽  
Temperature Characteristic ◽  
Multilayer Graphene

scholarly journals Multilayer Graphene/Carbon Black/Chlorine Isobutyl Isoprene Rubber Nanocomposites

Polymers ◽  
2016 ◽  
Vol 8 (3) ◽  
pp. 95 ◽  
Author(s):  
Daniele Frasca ◽  
Dietmar Schulze ◽  
Volker Wachtendorf ◽  
Bernd Krafft ◽  
Thomas Rybak ◽  
...  
Keyword(s):  
Carbon Black ◽  
Multilayer Graphene ◽  
Rubber Nanocomposites ◽  
Isoprene Rubber

Negative Temperature Coefficient of PVC Filled with Carbon Black

2011 ◽  
Vol 301-303 ◽  
pp. 1128-1132 ◽  
Author(s):  
Ji Xin Li
Keyword(s):  
Carbon Black ◽  
Temperature Coefficient ◽  
Negative Temperature Coefficient ◽  
Negative Temperature ◽  
Temperature Characteristic ◽  
Polymer Structure ◽  
Point Of View ◽  
Melt Mixing ◽  
Mixing Method ◽  
Different Content

PVC filled with carbon black (CB) composition were prepared by a conventional melt-mixing method. The effects of CB on the negative-temperature-coefficient (NTC) effect and the resistivity-temperature characteristic of PVC/CB composites were studied. Our present research suggests that percolation threshold can be obtained for the content of CB 10%. The reasons of NTC phenomenon were also investigated from point of view of polymer structure. We also discussed relationship between the current and voltage, that is, the I-U characteristic of the composites can be divided into two regions, ohmic and nonohmic according to the different content of CB and voltage.

scholarly journals Multifunctional graphene nanofiller in flame retarded polybutadiene/chloroprene/carbon black composites

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 244-262
Author(s):  
Alexander Battig ◽  
Naïssa Abdou-Rahaman Fadul ◽  
Daniele Frasca ◽  
Dietmar Schulze ◽  
Bernhard Schartel
Keyword(s):  
Mechanical Properties ◽  
Aspect Ratio ◽  
Carbon Black ◽  
Material Properties ◽  
Flame Retardants ◽  
Fire Behavior ◽  
Partial Substitution ◽  
Graphene Sheets ◽  
Multilayer Graphene ◽  
Flame Retarded

Abstract To curtail flammability risks and improve material properties, flame retardants (FRs) and fillers are mixed into rubbers. High loadings of aluminum trihydroxide (ATH) and carbon black (CB) are the most used FRs and reinforcing additive, respectively, in rubbers. To reduce loading without losing mechanical properties, partial substitution of ATH as well as CB by low amounts of multilayer graphene (MLG) nanoparticles is investigated. The high aspect ratio MLG is made of ten graphene sheets. In polybutadiene/chloroprene (BR/CR) nanocomposites 3 phr MLG replaced 15 phr CB and/or 3 phr ATH. Material and mechanical properties as well as fire behavior of the nanocomposites are compared to BR/CR with 20 phr CB both with and without 50 phr ATH. MLG appears as a promising nanofiller to improve the functional properties: replacement of CB improved rheological, curing, and mechanical properties; substitution of ATH improved nanocomposite properties without affecting flame retardancy.

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.

Extraction and identification of fillers and pigments from pyrolyzed rubber and tire samples

1996 ◽  
Vol 54 ◽  
pp. 174-175
Author(s):  
P. Sadhukhan ◽  
J. B. Zimmerman
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Carbon Black ◽  
Natural Rubber ◽  
Transmission Electron Microscope ◽  
Rolling Resistance ◽  
Synthetic Polymers ◽  
Nitrogen Atmosphere ◽  
Transmission Electron ◽  
Curing Agents

Rubber stocks, specially tires, are composed of natural rubber and synthetic polymers and also of several compounding ingredients, such as carbon black, silica, zinc oxide etc. These are generally mixed and vulcanized with additional curing agents, mainly organic in nature, to achieve certain “designing properties” including wear, traction, rolling resistance and handling of tires. Considerable importance is, therefore, attached both by the manufacturers and their competitors to be able to extract, identify and characterize various types of fillers and pigments. Several analytical procedures have been in use to extract, preferentially, these fillers and pigments and subsequently identify and characterize them under a transmission electron microscope.Rubber stocks and tire sections are subjected to heat under nitrogen atmosphere to 550°C for one hour and then cooled under nitrogen to remove polymers, leaving behind carbon black, silica and zinc oxide and 650°C to eliminate carbon blacks, leaving only silica and zinc oxide.

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