Chemical Recycling of Epoxide-Anhydride Hardened Networks Using Near-Critical Water

2013 ◽  
Vol 658 ◽  
pp. 153-157 ◽  
Author(s):  
Yu Yan Liu ◽  
Song Quan Wu ◽  
Li Li ◽  
Yu Ting Liu ◽  
Guo Hua Shan
Keyword(s):  
Epoxy Resin ◽  
Degradation Rate ◽  
Diglycidyl Ether ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Recycling ◽  
Reaction Products ◽  
Degradation Behaviour ◽  
Bisphenol A Diglycidyl Ether ◽  
Stainless Steel Reactor ◽  
Degradation Reaction

The degradation behaviour of an anhydride-cured bisphenol A diglycidyl ether (DGEBA) epoxy resin in near-critical water was studied in this paper. The experiments were performed in a stainless steel reactor (100ml) without stirring. Epoxy resin could be decomposed successfully at 270°C for 30 min. The degradation rate of epoxy resin increased with an increase in reaction temperature and reaction pressure. The degradation reaction products were characterized by gas chromatography-mass spectrometry (GC-MS). The degradation reaction was associated with the scission of ester and ether bonds which further destabilizes the epoxy network.

scholarly journals Ethoxylated Butoxyethanol-BADGE Adducts—New Potential Migrants from Epoxy Resin Can Coating Material

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3682
Author(s):  
Monika Beszterda ◽  
Małgorzata Kasperkowiak ◽  
Magdalena Frańska ◽  
Sandra Jęziołowska ◽  
Rafał Frański
Keyword(s):  
Mass Spectrometry ◽  
High Pressure ◽  
Liquid Chromatography ◽  
Epoxy Resin ◽  
Diglycidyl Ether ◽  
Ionization Mass ◽  
Coating Materials ◽  
Oxyethylene Unit ◽  
Bisphenol A Diglycidyl Ether ◽  
Product Ions

The acetonitrile extracts of can-coating materials have been analyzed by using high-pressure liquid chromatography/electrospray ionization-mass spectrometry (HPLC/ESI-MS). On the basis of detected ions [M + H]+, [M + NH4]+, [M + Na]+ and product ions, the ethoxylated butoxyethanol-bisphenol A diglycidyl ether adducts were identified in two of the analyzed extracts. Although the oxyethylene unit-containing compounds are widely used for the production of different kinds of materials, the ethoxylated species have not been earlier detected in epoxy resin can-coatings.

Stereochemistry and miscibility of epoxy resin–poly(trimethylene terephthalate) blends

RSC Advances ◽  
2014 ◽  
Vol 4 (48) ◽  
pp. 25420-25429 ◽  
Author(s):  
Sarath Chandran ◽  
F. Antolasic ◽  
K. J. Eichhorn ◽  
Robert A. Shanks ◽  
S. Thomas
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Molecular Conformation ◽  
Close Packing ◽  
Diglycidyl Ether ◽  
System P ◽  
Bisphenol A Diglycidyl Ether ◽  
Trimethylene Terephthalate ◽  
Packing Ability

Stereochemistry is proposed to contribute to the miscibility of poly(trimethylene terephthalate) (PTT) and bisphenol-A diglycidyl ether (BADGE), since molecular conformation is one of the determinants of the close packing ability and hence the interactions of such a system.

scholarly journals Toughening of Bisphenol-A Diglycidyl Ether-based Epoxy by Modification with Hydroxyl-terminated Liquid Natural Rubber

2017 ◽  
Vol 30 (1&2) ◽  
pp. 22-28
Author(s):  
H. L. Pham ◽  
B. T. Do ◽  
T. S. Pham ◽  
D. G. Le
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Fenton Reaction ◽  
Impact Resistance ◽  
Diglycidyl Ether ◽  
Toluene Diisocyanate ◽  
Scanning Electronic Microscopy ◽  
Bisphenol A Diglycidyl Ether ◽  
Liquid Natural Rubber ◽  
The Impact

Hydroxyl-terminated liquid natural rubbers (HTNRs), prepared by the Photo-Fenton reaction, were used to modify bisphenol-A diglycidyl ether-based epoxy (DGEBA). A chemical link between HTNRs and the epoxy resin was promoted employing toluene diisocyanate. The reactions between elastomers and epoxy resin were followed by FTIR. The mechanical properties of the composites were evaluated and the microstructure was investigated using scanning electronic microscopy. The results showed that the impact resistance of HTNR-modified DGEBA was superior to that of the pure epoxy resin. For the composites with HTNR, the impact resistance increased with elastomer concentration up to 2.5 parts per hundred parts of resin. Higher concentration of HTNR resulted in larger particles which gave lower impact values.

Analysis of Reaction Products of Food Contaminants and Ingredients: Bisphenol A Diglycidyl Ether (BADGE) in Canned Foods

2010 ◽  
Vol 58 (8) ◽  
pp. 4873-4882 ◽  
Author(s):  
Leon Coulier ◽  
Emma L. Bradley ◽  
Richard C. Bas ◽  
Kitty C. M. Verhoeckx ◽  
Malcolm Driffield ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Diglycidyl Ether ◽  
Reaction Products ◽  
Food Contaminants ◽  
Bisphenol A Diglycidyl Ether ◽  
Canned Foods

scholarly journals Determination of bisphenol A, bisphenol F, bisphenol A diglycidyl ether and bisphenol F diglycidyl ether migrated from food cans using Gas Chromatography-Mass Spectrometry

2011 ◽  
Vol 21 (No. 3) ◽  
pp. 85-90 ◽  
Author(s):  
I. Jordáková ◽  
J. Dobiáš ◽  
M. Voldřich ◽  
J. Postka
Keyword(s):  
Gas Chromatography ◽  
Bisphenol A ◽  
Epoxy Resins ◽  
Diglycidyl Ether ◽  
Gas Chromatography Mass Spectrometry ◽  
Simple Method ◽  
Bisphenol F ◽  
Mass Spectrometric Detector ◽  
Bisphenol A Diglycidyl Ether

Varnishes used for the inner coatings of food cans are mostly based on epoxy resins or vinylic organosols. The epoxy resins are produced from bisphenol A and bisphenol F and they also contain BADGE or BFDGE as stabilising components. A simple method for the quantitative determination of bisphenol A (BPA), bisphenol F (BPF), bisphenol A diglycidyl ether (BADGE), and bisphenol F diglycidyl ether (BFDGE) migrated from food packaging materials was optimised. The can sample was extracted with acetonitrile or with food simulants (distilled water, 3% acetic acid and 10% ethanol) and the extract obtained was analysed by gas chromatography coupled with mass spectrometric detector. The limits of detection and quantification ranged between 0.15&ndash;0.86 and 0.51&ndash;2.77 &micro;g/dm<sup>2</sup>, respectively. The migrating levels of bisphenols found in various can samples were for BPA and for BADGE in the range from 0.63 &times; 10<sup>&ndash;3</sup> to 0.34 mg/dm<sup>2</sup>, and from 1.49 &times; 10<sup>&ndash;3</sup> to 3.67 mg/dm<sup>2</sup>, respectively. BPF and BFDGE were practically not detected in the can samples. &nbsp;

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