Catalytic effect of 2,2′-diallyl bisphenol A on thermal curing of cyanate esters

2006 ◽  
Vol 101 (3) ◽  
pp. 1775-1786 ◽  
Author(s):  
Henry C. Y. Koh ◽  
Jie Dai ◽  
Eileen Tan ◽  
Weirong Liang
Keyword(s):  
Bisphenol A ◽  
Catalytic Effect ◽  
Thermal Curing ◽  
Cyanate Esters

scholarly journals Reduced Graphene Oxide–P25 Nanocomposites as Efficient Photocatalysts for Degradation of Bisphenol A in Water

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 607 ◽  
Author(s):  
Fei Yu ◽  
Xueting Bai ◽  
Changfu Yang ◽  
Lijie Xu ◽  
Jie Ma
Keyword(s):  
Graphene Oxide ◽  
Bisphenol A ◽  
Reduced Graphene Oxide ◽  
Catalytic Effect ◽  
Light Sources ◽  
Solution Ph ◽  
Sunlight Irradiation ◽  
Practical Applications ◽  
Reduced Graphene

Reduced graphene oxide–titanium dioxide photocatalyst (rGO–TiO2) was successfully synthesized by the hydrothermal method. The rGO–TiO2 was used as photocatalyst for the degradation of bisphenol A (BPA), which is a typical endocrine disruptor of the environment. Characterization of photocatalysts and photocatalytic experiments under different conditions were performed for studying the structure and properties of photocatalysts. The characterization results showed that part of the anatase type TiO2 was converted into rutile type TiO2 after hydrothermal treatment and 1% rGO–P25 had the largest specific surface area (52.174 m2/g). Photocatalytic experiments indicated that 1% rGO–P25 had the best catalytic effect, and the most suitable concentration was 0.5 g/L. When the solution pH was 5.98, the catalyst was the most active. Under visible light, the three photocatalytic mechanisms were ranked as follows: O2•− > •OH > h+. 1% rGO–P25 also had strong photocatalytic activity in the photocatalytic degradation of BPA under sunlight irradiation. 1% rGO–P25 with 0.5 g/L may be a very promising photocatalyst with a variety of light sources, especially under sunlight for practical applications.

Catalytic effect of sulfonated poly (styrene-divinylbenzene) microspheres on the thermal curing behavior of benzoxazine

2018 ◽  
Vol 661 ◽  
pp. 106-115 ◽  
Author(s):  
Junping Zhou ◽  
Chunxia Zhao ◽  
Ling Liu ◽  
Jie Ding ◽  
Yuntao Li
Keyword(s):  
Catalytic Effect ◽  
Thermal Curing ◽  
Curing Behavior ◽  
Styrene Divinylbenzene ◽  
Sulfonated Poly

Corrosion protection of hydrophobic bisphenol A-based polybenzoxazine coatings on mild steel

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5805-5811 ◽  
Author(s):  
Xin Lu ◽  
Yan Liu ◽  
Changlu Zhou ◽  
Wenfei Zhang ◽  
Zhong Xin
Keyword(s):  
Corrosion Resistance ◽  
Bisphenol A ◽  
Mild Steel ◽  
Corrosion Protection ◽  
Dip Coating ◽  
Thermal Curing ◽  
Excellent Corrosion Resistance ◽  
Curing Method

Hydrophobic bisphenol A-based polybenzoxazine coatings with excellent corrosion resistance were prepared through a simple dip coating and thermal curing method.

Sulfonated poly (arylene ether sulfone) proton exchange membranes for fuel cell applications

2015 ◽  
Vol 4 (4) ◽  
Author(s):  
Vaishnav Kiran ◽  
Bharti Gaur
Keyword(s):  
Fourier Transform ◽  
Fuel Cell ◽  
Bisphenol A ◽  
Epoxy Resin ◽  
Structural Characterization ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Thermal Curing ◽  
Arylene Ether ◽  
Sulfonated Poly

AbstractSulfonated poly (arylene ether sulfone) membranes were synthesized by direct copolymerization of 4,4-bis (4-hydroxyphenyl) valeric acid, 4,4′-difluorodiphenyl sulfone and synthesized sulfonated 6F-bisphenol-A/bisphenol-A as novel proton exchange membranes for fuel cell applications. Prepared membranes were subsequently crosslinked with synthesized 6F-bisphenol-A based epoxy resin (EFN) by thermal curing reaction keeping in view the resilience and toughness of the membranes. The structural characterization was done by using Fourier transform infrared (FTIR),

Thermal curing study of bisphenol A benzoxazine for barrier coating applications on 1050 aluminum alloy

2015 ◽  
Vol 79 ◽  
pp. 53-61 ◽  
Author(s):  
Julien Escobar ◽  
Marc Poorteman ◽  
Ludovic Dumas ◽  
Leïla Bonnaud ◽  
Philippe Dubois ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Bisphenol A ◽  
Thermal Curing ◽  
Barrier Coating ◽  
1050 Aluminum Alloy

Synthesis and thermal studies of bis(isomaleimide)/bisphenol A and ortho novalac blends

2019 ◽  
Vol 52 (6) ◽  
pp. 495-520 ◽  
Author(s):  
Vijayakumar Sarannya ◽  
S Shamim Rishwana ◽  
Rajaram Mahalakshmy ◽  
Arunjunai Raj Mahendran ◽  
R Surender ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Fourier Transform ◽  
Bisphenol A ◽  
Phenol Formaldehyde ◽  
Thermal Studies ◽  
Thermal Curing ◽  
Scanning Calorimetry ◽  
Volatile Products ◽  
Degradation Properties

Phenol formaldehyde ortho novalac (ON) resin and 4,4′-bisisomaleimidodiphenyl methane (VS) were prepared. Bisphenol A (BPA) and ON were blended with VS in different ratios and thermally cured. The structural characterization of the synthesized and polymerized materials was done using Fourier transform infrared (FTIR) spectroscopy. The thermal curing properties of VS and its blends were investigated using differential scanning calorimetry. The temperature at which the rate of curing was maximum ( T max) was found to be varying from 210°C to 220°C. The degradation properties of the polymerized VS and its blends were studied using thermogravimetric analysis. The Friedman, corrected Flynn–Wall–Ozawa, corrected Kissinger–Akahira–Sunose, and advanced Vyazovkin methods are used to calculate the Ea-D for various reaction extents ( α). The variation of ln A with the α and thermal lifetime for these materials were predicted. The volatile products obtained during the thermal degradation of these polymers are analyzed using thermogravimetric-FTIR.

Fast pyrolysis bio-oil from lignocellulosic biomass for the development of bio-based cyanate esters and cross-linked networks

2019 ◽  
Vol 31 (9-10) ◽  
pp. 1140-1152
Author(s):  
Mehul Barde ◽  
Charles Warren Edmunds ◽  
Nicole Labbé ◽  
Maria Lujan Auad
Keyword(s):  
Bisphenol A ◽  
Ftir Spectroscopy ◽  
Fast Pyrolysis ◽  
Mechanical Analysis ◽  
Thermomechanical Properties ◽  
Cyanate Ester ◽  
Raw Material ◽  
Resonance Spectroscopy ◽  
Cyanate Esters ◽  
Bio Oil

Fast pyrolysis of pine wood was carried out to yield a liquid bio-oil mixture that was separated into organic and aqueous phases. The organic phase (ORG-bio-oil) was characterized by gas chromatography–mass spectroscopy, 31P-nuclear magnetic resonance spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. It was further used as a raw material for producing a mixture of biphenolic compounds (ORG-biphenol). ORG-bio-oil, ORG-biphenol, and bisphenol-A were reacted with cyanogen bromide to yield cyanate ester monomers. Cyanate esters were characterized using FTIR spectroscopy and were thermally cross-linked to develop thermoset materials. Thermomechanical properties of cross-linked cyanate esters were assessed using dynamic mechanical analysis and compared with those of cross-linked bisphenol-A-based cyanate ester. ORG-biphenol cyanate ester was observed to have a superior glass transition temperature (350–380°C) as compared to bisphenol-A cyanate ester (190–220°C). Cyanate esters derived from bio-oil have the potential to be a sustainable alternative to the bisphenol-A-derived analog.

A novel aptasensing method for detecting bisphenol A using the catalytic effect of the Fe3O4/Au nanoparticles on the reduction reaction of the silver ions

2021 ◽  
pp. 129666
Author(s):  
Fatemeh Farahbakhsh ◽  
Esmaeil Heydari-Bafrooei ◽  
Mehdi Ahmadi ◽  
Seyedeh Hoda Hekmatara ◽  
Mohammad Sabet
Keyword(s):  
Bisphenol A ◽  
Au Nanoparticles ◽  
Catalytic Effect ◽  
Silver Ions ◽  
Reduction Reaction

Probing the Chemistry and Spectroscopy of Radiation-Sensitive Polymers by Parallel-Detection EELS

1990 ◽  
Vol 48 (2) ◽  
pp. 34-35
Author(s):  
E. G. Rightor ◽  
G. P. Young
Keyword(s):  
Electron Beam ◽  
Bisphenol A ◽  
Energy Loss ◽  
Parallel Detection ◽  
Commercial Grade ◽  
Incident Electron Beam ◽  
Ptfe Sample ◽  
Spectroscopic Information ◽  
Edge Features ◽  
Electron Energy Loss

Investigation of neat polymers by TEM is often thwarted by their sensitivity to the incident electron beam, which also limits the usefulness of chemical and spectroscopic information available by electron energy loss spectroscopy (EELS) for these materials. However, parallel-detection EELS systems allow reduced radiation damage, due to their far greater efficiency, thereby promoting their use to obtain this information for polymers. This is evident in qualitative identification of beam sensitive components in polymer blends and detailed investigations of near-edge features of homopolymers.Spectra were obtained for a poly(bisphenol-A carbonate) (BPAC) blend containing poly(tetrafluoroethylene) (PTFE) using a parallel-EELS and a serial-EELS (Gatan 666, 607) for comparison. A series of homopolymers was also examined using parallel-EELS on a JEOL 2000FX TEM employing a LaB6 filament at 100 kV. Pure homopolymers were obtained from Scientific Polymer Products. The PTFE sample was commercial grade. Polymers were microtomed on a Reichert-Jung Ultracut E and placed on holey carbon grids.

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