Enhancing thermal conductivity and physical properties of phenol-formaldehyde resin by adding VGCF during pyrolysis

2006 ◽  
Vol 102 (2) ◽  
pp. 1531-1538 ◽  
Author(s):  
Tse-Hao Ko ◽  
Hsien-Lin Hu ◽  
Wen-Shyong Kuo ◽  
Su-How Wang
Keyword(s):  
Thermal Conductivity ◽  
Physical Properties ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin

Tribological performance and thermal conductivity of graphene–Fe3O4/poly(phenol-formaldehyde resin) hybrid reinforced carbon fiber composites

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60200-60205 ◽  
Author(s):  
Honglong Li ◽  
Lin Jin ◽  
Jinglong Dong ◽  
Liu Liu ◽  
Ming Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Phenol Formaldehyde ◽  
Fiber Composites ◽  
Tribological Performance ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Carbon Fiber Composites

Poly(phenol-formaldehyde resin)/carbon fiber composites with different ratios of graphene–Fe3O4 were manufactured through a molding press process.

Improvements in Essential Electrical and Physical Properties of Phenol Formaldehyde Resin by Incorporation of Modified Coal Tar Pitch

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Sapana Kaushik ◽  
Rajesh Kumar Raina ◽  
Gurucharan Lal Verma ◽  
Gopal Bhatia ◽  
Rakesh Kumar Khandal
Keyword(s):  
Physical Properties ◽  
Phenol Formaldehyde ◽  
Coal Tar ◽  
Reference Sample ◽  
Volume Resistivity ◽  
Dielectric Strength ◽  
Phenol Formaldehyde Resin ◽  
Coal Tar Pitch ◽  
Formaldehyde Resin ◽  
Step Method

AbstractPhenol-formaldehyde (PF) resin is used here for making thermosetting composites along with environmentally friendly coal tar pitch(CTP). These PF-CTP composites are made with dual objectives of using environment-friendly CTP to improve the electrical and physical properties of PF resin and to reduce cost of PF resin for final applications. The composites are prepared by a two-step method using standard compression molding technique. Comparing the properties of the samples containing varying amount of CTP with pure PF resin as the reference sample, significant improvements in electrical properties like surface resistivity, volume resistivity and dielectric strength are observed with the increase in amount of CTP. The waterproofing tendency also improved as the amount of CTP is increased. The best properties are observed for the thermosetting composition with 40 phr of CTP.

Basic Physical Properties Relied upon in the Frozen Stress Technique

1948 ◽  
Vol 158 (1) ◽  
pp. 230-235 ◽  
Author(s):  
W. A. P. Fisher
Keyword(s):  
Physical Properties ◽  
Elastic Properties ◽  
Phenol Formaldehyde ◽  
Three Dimensional ◽  
Phenol Formaldehyde Resin ◽  
Experimental Results ◽  
Formaldehyde Resin ◽  
Optical Coefficient ◽  
Freezing Method ◽  
Stress Freezing Method

The “Stress Freezing” method is a useful means of solving problems of three-dimensional stress by photo-elasticity. The method makes use of the fact that some thermo-setting resins having photo-elastic properties possess considerable residual thermo-plasticity. When softened by heat they obey Hooke's law, though the Young's modulus is, of course, very much reduced. At a given temperature, the birefringence, as well as the strain, has been shown to be proportional to the stress. Both strain and birefringence persist after cooling and unloading, and even after slicing the model. This behaviour is illustrated by means of a simplified concept. In the U.S.A., Glyptal resin is used (Bakelite B.T. 61 893), but this material cannot be had in thicknesses greater than 1 inch. Glass-clear phenol-formaldehyde resin (Catalin 800), which gives a higher stress-optical coefficient, can be had in larger sizes. The properties of both materials are compared, and troubles such as “rind effect” are discussed. Some experimental results obtained with Catalin 800 are given by way of illustration. The suitability of this material has been under investigation for some time at the Royal Aircraft Establishment, Farnborough, and careful tests have shown that, when suitably cured, Catalin 800 can give reliable results, but that “rind effect” is still a serious drawback.

Purification of water contaminated with heavy metals by example of lead as promising material based on graphene nanostructures

2020 ◽  
pp. 34-43
Author(s):  
N. R. Memetov ◽  
◽  
A. V. Gerasimova ◽  
A. E. Kucherova ◽  
◽  
...  
Keyword(s):  
Adsorption Process ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Parameter Estimates ◽  
Maximum Adsorption Capacity ◽  
Ecological Situation ◽  
Characteristic Parameters ◽  
Purification Of Water ◽  
Graphene Nanostructures

The paper evaluates the effectiveness of the use of graphene nanostructures in the purification of lead (II) ions to improve the ecological situation of water bodies. The mechanisms and characteristic parameters of the adsorption process were analyzed using empirical models of isotherms at temperatures of 298, 303, 313 and 323 K, which correspond to the following order (based on the correlation coefficient): Langmuir (0.99) > Temkin (0.97) > Dubinin – Radushkevich (0.90). The maximum adsorption capacity of the material corresponds to the range from 230 to 260 mg/g. We research the equilibrium at the level of thermodynamic parameter estimates, which indicates the spontaneity of the process, the endothermic nature and structure change of graphene modified with phenol-formaldehyde resin during the adsorption of lead (II) ions, leading to an increase in the disorder of the system.

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