Pyrolysis Behavior of Boron-Containing Phenol-Formaldehyde Resin (BPFR) Modified by B2O3

2014 ◽  
Vol 616 ◽  
pp. 315-318 ◽  
Author(s):  
Qin Lu ◽  
Fei Chen ◽  
Qiang Shen ◽  
Yan Qin ◽  
Zhi Xiong Huang ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Phenol Formaldehyde ◽  
Structural Evolution ◽  
Phenol Formaldehyde Resin ◽  
Resin Matrix ◽  
Formaldehyde Resin ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Decomposition Behavior ◽  
Ft Ir Spectroscopy

In this study, pure boron-containing phenol-formaldehyde resin (BPFR) and boron oxide (B2O3) modified BPFR have been pyrolyzed at elevated temperatures in air and their thermal decomposition behavior is mainly explored. The structural evolution and chemical composition change during pyrolysis are characterized by thermal gravity (TG), Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM). It is shown that the mass residues of pure BPFR are 27.1 and 8.7 wt.% after being pyrolyzed at 600 and 1000 °C for 2 h, respectively. In comparison with the pure BPFR, the mass residue of B2O3 modified BPFR is obviously higher, with the values of 72.9 and 39.7 wt.% at 600 °C and 1000 °C, respectively. The results of FT-IR prove the degradation and failure of the resin matrix are mainly resulted from the fracture of methylene and the release of small molecules. The XRD characterization shows the residues are amorphous carbon and B2O3. FE-SEM exhibits the melting B2O3 layer formed on the surface of the samples which could prevent oxygen from diffusing into composites during oxidation to some extent.

The Electrical Resistivity of B4C Modified Phenol-Formaldehyde Resin Matrix Composite Materials Pyrolyzed at Different Temperatures

2012 ◽  
Vol 583 ◽  
pp. 36-39 ◽  
Author(s):  
Hai Yun Jiang ◽  
Ji Gang Wang ◽  
Shen Qing Wu ◽  
Wei Li Zhang
Keyword(s):  
Electrical Resistivity ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Resin Matrix ◽  
Formaldehyde Resin ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Treated ◽  
Different Temperatures ◽  
Resin Matrix Composite

The electrical resistivity is studied when B4C modified phenol-formaldehyde (PF) resin is heat-treated at temperatures of 300-1500 °C, and then the X-ray diffraction (XRD) spectra are also investigated. The results indicate that the electrical resistivity is elevated with the increase of pyrolytic temperature of PF resin. The addition of B4C decreases the electrical resistivity efficiently when the temperature is range of 700-1000 °C. Especially the composite is treated at tmperatures of 1000-1500 °C. The analysis of XRD spectra suggests that the addition of B4C promotes the arrangement of residue at high temperature. The arrangement reaction has not a direct effect on the electrical resistivity.

New Strategy toward Novel Hyperbranched Phenol-Formaldehyde Resin: Synthesis, Characterization and Curing Study

2007 ◽  
Vol 29-30 ◽  
pp. 177-180
Author(s):  
Samaresh Ghosh
Keyword(s):  
Phenol Formaldehyde ◽  
Flow Behavior ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Scanning Calorimetry ◽  
Elemental Analyses ◽  
New Strategy ◽  
Ft Ir ◽  
First Time ◽  
Tof Ms

Novel hyperbranched phenol-formaldehyde (HBPF) resin 1 has been prepared for the first time. Thorough characterizations (FT-IR, NMR, HPLC, MALDI-TOF MS and elemental analyses and rheological flow behavior) were performed to ascertain the structure of HBPF 1. The condensationcuring event of HBPF with diglycidylether of bisphenol-A (DGEBA) has been studied by differential scanning calorimetry (DSC) technique.

An X-ray diffraction study of phenol-formaldehyde resin carbons

Carbon ◽  
1968 ◽  
Vol 6 (3) ◽  
pp. 359-363 ◽  
Author(s):  
K. Kobayashi ◽  
S. Sugawara ◽  
S. Toyoda ◽  
H. Honda
Keyword(s):  
Diffraction Study ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals PENGARUH PENAMBAHAN RESORSINOL PADA PEMBUATAN PEREKAT LIKUIDA SABUT KELAPA

2015 ◽  
Vol 3 (4) ◽  
pp. 37-43
Author(s):  
Mutiara Istiqomah ◽  
Netti Herlina
Keyword(s):  
Phenol Formaldehyde ◽  
Adhesive Force ◽  
Phenol Formaldehyde Resin ◽  
Solid Content ◽  
Formaldehyde Resin ◽  
Liquid Form ◽  
Third Stage ◽  
Ft Ir ◽  
Coconut Coir ◽  
Two Stages

Liquid adhesive coconut coir is the result of a reaction between lignin powder material used with aromatic compounds at high temperatures in order to obtain a solution that can be used as an adhesive. This study aims to investigate the characteristics of liquid adhesive of coconut coir (LACC) qualities  and determine the effect of resorcinol in the manufacture of adhesives LACC. The study was conducted in three phases: the first stage of coir manufacturing particles, which at this stage coir made into particles of 100 mesh, adhesive manufacturing second stage LACC which at this stage there are two stages of the liquefaction reaction coir and polymerization, and the third stage addition of resorcinol LACC into the adhesive. The variables used in this study is the addition of variable rate resorcinol at 10, 20, 30% by weight. Variables - variables that were analyzed pH, viscosity, spesific gravity, solid content, formaldehyde-free rate and compound analysis using FT-IR adhesive LACC to conditions without the addition of resorcinol and with the addition of 30% resorcinol. The results showed that the addition of resorcinol LACC influence on the resulting adhesive, which has a liquid form, the pH ranged from 12.6 to 10.6, 43,867- 131.712 cps viscosity, specific gravity of 1.252 to 1.258, solid content 46.67 to 80%, from 1.952 to 1.051% formaldehyde content. FT-IR results showed similarity LACC adhesive force phenol formaldehyde resin, namely the presence of the OH group, C = H of the aromatic ring, of methylene CH, CO from ether and fenolic compound.

Calcium lignosulfonate as eco-friendly additive for crosslinking fibrous composites with phenol-formaldehyde resin matrix

Polimery ◽  
2018 ◽  
Vol 63 (02) ◽  
pp. 102-108 ◽  
Author(s):  
Lukasz Klapiszewski ◽  
Rafal Oliwa ◽  
Mariusz Oleksy ◽  
Teofil Jesionowski
Keyword(s):  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Resin Matrix ◽  
Formaldehyde Resin ◽  
Fibrous Composites

Microstructure and Oxidation Resistance of Muscovite-Glass Frits Loaded High Silica Cloth/Boron-Containing Phenol-Formaldehyde Resin-Based Ceramifying Composites

2013 ◽  
Vol 319 ◽  
pp. 34-38
Author(s):  
Yan Qin ◽  
Jie Ding ◽  
Zhi Xiong Huang ◽  
Qi Lin Mei ◽  
Zhi Long Rao
Keyword(s):  
Phenol Formaldehyde ◽  
Oxidative Degradation ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
X Ray Diffraction ◽  
Mullite Ceramic ◽  
Muscovite Mica ◽  
Fiberglass Fabric ◽  
High Silica ◽  
Thermo Oxidative Degradation

The boron-containing phenol-formaldehyde resin-based ceramifying composites that used muscovite mica and glass frits loaded boron-containing phenol-formaldehyde resin (BPF) as matrix, high silica fiberglass fabric as reinforcements, were pyrolyzed into ceramic gradually in the air. Glass frits were fused into liquid phase and spread to the surface to make muscovite mica form compact mullite ceramic shell. The shell restrained oxygen into the internal effectively in order to reduce the thermo-oxidative degradation of BPF resin. X-ray diffraction analysis (XRD) showed that aluminium borate (Al8B4O33) and mullite (Al6Si2O13) crystalline phases after pyrolysis. SEM demonstrated the ceramifying progress of the microstructure of the composites, and EDS analyzed the micro-chemical composition.

Hydrothermal method for Y2O3:Eu3+ uniform nanophosphors with different templates

2019 ◽  
Vol 33 (20) ◽  
pp. 1950227
Author(s):  
Xue Jiang ◽  
Weihong Wu ◽  
Yuqian Li ◽  
Xiaoqing Guo ◽  
Nan Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Phenol Formaldehyde ◽  
Gum Arabic ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Sem Images ◽  
X Ray ◽  
Xrd Patterns

In this study, [Formula: see text]-doped yttrium oxide nanophosphors were prepared using the hydrothermal method assisting with the polyacrylic acid (PAA), phenol formaldehyde resin precursor (PF), and gum arabic (GA), respectively and their structural and optical properties were studied. X-ray diffraction (XRD) patterns of the samples can be well indexed to the cubic structure. Additionally, scanning electron microscopy (SEM) images showed that the samples were different morphologies, via combining with different templates. The luminescence results revealed that the addition of templates have a significant influence on the luminescence properties of [Formula: see text]-doped [Formula: see text].

scholarly journals The application of zinc citrate for the synthesis of carbon materials

2021 ◽  
Vol 340 ◽  
pp. 01042
Author(s):  
Yuliya Sinelnikova ◽  
Nikolai Uvarov
Keyword(s):  
Thermal Decomposition ◽  
Carbon Materials ◽  
Phenol Formaldehyde ◽  
Specific Capacity ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Average Grain Size ◽  
Cyclic Voltamperometry

Zinc citrate was prepared and its thermal decomposition was investigated by methods of thermogravimetric analysis and differential scanning calorimetry. Products of the thermal decomposition were investigated by X-ray diffraction analysis. The decomposition proceeds at temperatures 50 - 420 °C in three stages and leads to the formation of nanocrystalline ZnO with the average grain size of 23 nm. Subsequently, zinc citrate was used as a precursor of ZnO hard template for preparation of carbon mesoporous materials by the solid template method. The carbon materials were obtained by pyrolysis of polymer matrix of phenol-formaldehyde resin in which zinc citrate was added. It was found that the resulting material has a specific surface area of 1051 m2/g. According to the cyclic voltamperometry data, the material has a specific capacity 40 F/g.

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