RAFT ‐based copolymers of acrylonitrile and alkyl acrylates as possible precursors for carbon fibers: synthesis and thermal behavior during stabilization

2021 ◽  
Author(s):  
Roman V. Toms ◽  
Mikhail S. Balashov ◽  
Alexander Yu Gervald ◽  
Nickolay I. Prokopov ◽  
Anna V. Plutalova ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Carbon Fibers ◽  
Alkyl Acrylates

Growth mechanism and thermal behavior of electroless Cu plating on short carbon fibers

2021 ◽  
pp. 127294
Author(s):  
Yuan Ma ◽  
Lingjun Guo ◽  
Lehua Qi ◽  
Jia Sun ◽  
Jiancheng Wang ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Carbon Fibers ◽  
Growth Mechanism ◽  
Short Carbon

scholarly journals The Thermal Behavior of Lyocell Fibers Containing Bis(trimethylsilyl)acetylene

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 537
Author(s):  
Igor Makarov ◽  
Markel Vinogradov ◽  
Maria Mironova ◽  
Georgy Shandryuk ◽  
Yaroslav Golubev ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Thermal Behavior ◽  
Carbon Fibers ◽  
Coefficient Of Thermal Expansion ◽  
Structural Features ◽  
Amorphous Structure ◽  
Processing Temperature ◽  
Composite Fibers ◽  
Scanning Calorimetry ◽  
Lyocell Fibers

This study focuses on the preparation of carbon fiber precursors from solutions of cellulose in N-methylmorpholine-N-oxide with the addition of bis(trimethylsilyl)acetylene, studying their structural features and evaluating thermal behavior. The introduction of a silicon-containing additive into cellulose leads to an increase in the carbon yield during carbonization of composite precursors. The type of the observed peaks on the differential scanning calorimetry (DSC) curves cardinally changes from endo peaks intrinsic for cellulose fibers to the combination of endo and exo peaks for composite fibers. For the first time, coefficient of thermal expansion (CTE) values were obtained for Lyocell fibers and composite fibers with bis(trimethylsilyl)acetylene (BTMSA). The study of the dependence of linear dimensions of the heat treatment fibers on temperature made it possible to determine the relation between thermal expansion coefficients of carbonized fibers and thermogravimetric curves, as well as to reveal the relationship between fiber shrinkage and BTMSA bis(trimethylsilyl)acetylene content. Carbon fibers from composite precursors are obtained at a processing temperature of 1200 °C. A study of the structure of carbon fibers by X-ray diffraction, Raman spectroscopy, and transmission electron microscopy made it possible to determine the amorphous structure of the fibers obtained.

EXELFS Studies of Carbon Fibers

1990 ◽  
Vol 48 (2) ◽  
pp. 72-73
Author(s):  
V. Serin ◽  
K. Hssein ◽  
G. Zanchi ◽  
J. Sévely
Keyword(s):  
Carbon Fibers ◽  
Energy Analysis ◽  
Electron Excitation ◽  
Complex Structures ◽  
High Modulus ◽  
Promising Technique ◽  
X Ray ◽  
Fine Structures ◽  
X Ray Absorption

The present developments of electron energy analysis in the microscopes by E.E.L.S. allow an accurate recording of the spectra and of their different complex structures associated with the inner shell electron excitation by the incident electrons (1). Among these structures, the Extended Energy Loss Fine Structures (EXELFS) are of particular interest. They are equivalent to the well known EXAFS oscillations in X-ray absorption spectroscopy. Due to the EELS characteristic, the Fourier analysis of EXELFS oscillations appears as a promising technique for the characterization of composite materials, the major constituents of which are low Z elements. Using EXELFS, we have developed a microstructural study of carbon fibers. This analysis concerns the carbon K edge, which appears in the spectra at 285 eV. The purpose of the paper is to compare the local short range order, determined by this way in the case of Courtauld HTS and P100 ex-polyacrylonitrile carbon fibers, which are high tensile strength (HTS) and high modulus (HM) fibers respectively.

Coating of continuous carbon fibers with double layers by chemical vapor deposition

2001 ◽  
Vol 11 (PR3) ◽  
pp. Pr3-885-Pr3-892 ◽  
Author(s):  
N. Popovska ◽  
S. Schmidt ◽  
E. Edelmann ◽  
V. K. Wunder ◽  
H. Gerhard ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Fibers ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Double Layers

Morphology and properties of PA6 hybrid composites filled with short carbon fibers and organoclay

2016 ◽  
Vol 2 (3) ◽  
pp. 47-57 ◽  
Author(s):  
S.S. Pesetskii ◽  
S.P. Bogdanovich ◽  
V.V. Dubrovskii ◽  
T.M. Sodyleva ◽  
V.N. Aderikha ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Hybrid Composites ◽  
Short Carbon

Influence of carbon fibers and tungsten disulfide on the properties and structure of polytetrafluoroethylene

2018 ◽  
Vol 4 (3) ◽  
pp. 26-34
Author(s):  
A. A. Okhlopkova ◽  
A. P., Vasilev ◽  
T. S. Struchkova ◽  
A. G. Alekseev ◽  
P. N. Grakovich
Keyword(s):  
Carbon Fibers ◽  
Tungsten Disulfide ◽  
And Tungsten

Microwave Absorbing Properties of Carbon Fibers Modified with BN/SiC Composite Coatings

2014 ◽  
Vol 29 (10) ◽  
pp. 1093 ◽  
Author(s):  
ZHOU Wei ◽  
XIAO Peng ◽  
LI Yang ◽  
LUO Heng ◽  
HONG Wen
Keyword(s):  
Carbon Fibers ◽  
Composite Coatings ◽  
Microwave Absorbing Properties ◽  
Microwave Absorbing
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