Epoxy resin/acrylic composite latexes: reactivity and stability of epoxy groups with carboxyl groups

2001 ◽  
Vol 12 (4) ◽  
pp. 521-532 ◽  
Author(s):  
H. Kawahara ◽  
S. Matsufuji ◽  
T. Goto ◽  
Y. Okamoto ◽  
H. Ogura ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Carboxyl Groups ◽  
Epoxy Groups

Quantitative Analysis Methods of Thiirane/Epoxy Resin of Bisphenol A

2006 ◽  
Vol 11-12 ◽  
pp. 379-382 ◽  
Author(s):  
Ya Feng Li ◽  
Jue Cheng
Keyword(s):  
Quantitative Analysis ◽  
Bisphenol A ◽  
Epoxy Resin ◽  
1H Nmr ◽  
Nmr Spectra ◽  
Epoxy Compound ◽  
Separation Method ◽  
The Poor ◽  
Epoxide Compound ◽  
Epoxy Groups

Thiirane is usually synthesized by epoxy resin, and there are considerable content of epoxy mixed in thiirane because of the poor yields. In this article, a novel separation method was used to get pure episulfide compound and epoxy compound from thiirane/epoxy resin synthesized in our lab. Furthermore, the perfect 1H NMR spectra of pure episulfide compound and epoxide compound were obtained. The quantitative analysis of content of epoxy groups in thiirane/epoxy resin was performed by using FTIR and was testified by 1H NMR. It was found that the analytical results of the conversion of epoxy groups by the two methods above coincided with each other well.

Organic Aerogels Based on Epoxy Resins: Synthesis and Properties

2020 ◽  
Vol 869 ◽  
pp. 240-245
Author(s):  
Alexey Voytik ◽  
Georgiy V. Malkov ◽  
Artur T. Kapasharov ◽  
Alexey Yu. Kostin
Keyword(s):  
Infrared Spectroscopy ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Supercritical Drying ◽  
Curing Conditions ◽  
Solvent Content ◽  
Bet Method ◽  
Catalyst Content ◽  
Organic Aerogels ◽  
Epoxy Groups

The aim of this work was to develop methods for the synthesis of organic aerogels based on epoxy resins and to investigate their properties. Aerogels based on DGEBA-epoxy resin were obtained by CO2-supercritical drying of gel samples prepared from acetone solutions of epoxy resin with different amount of catalyst and solvents. As a result, aerogels of different density were obtained; the dependence of density on the solvent content in the samples was revealed. The aerogels were characterized by infrared spectroscopy to define the degree of conversion of the epoxy groups, by SEM to confirm nanoscale morphology of aerogels, as well as by the BET method to determine the specific surface area of the samples and its dependence on the catalyst content and curing conditions.

Enhanced Adhesion Effect of Epoxy Resin on Metal Surfaces Using Polymer with Catechol and Epoxy Groups

2020 ◽  
Vol 2 (4) ◽  
pp. 1500-1507 ◽  
Author(s):  
Yucheng Zhang ◽  
Koichi Hasegawa ◽  
Sota Kamo ◽  
Kiyoka Takagi ◽  
Wei Ma ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Metal Surfaces ◽  
Epoxy Groups ◽  
Adhesion Effect

Glycidyl methacrylate-crosslinked fish swim bladder as a novel cardiovascular biomaterial with improved antithrombotic and anticalcification properties

2021 ◽  
pp. 088532822110542
Author(s):  
Meiling Li ◽  
Cheng Zheng ◽  
Binggang Wu ◽  
Kailei Ding ◽  
Shumang Zhang ◽  
...  
Keyword(s):  
Glycidyl Methacrylate ◽  
Platelet Adhesion ◽  
Ex Vivo ◽  
Carboxyl Groups ◽  
Swim Bladder ◽  
Subcutaneous Implantation ◽  
Porcine Pericardium ◽  
Epoxy Groups ◽  
Polymerization Method ◽  
Anticoagulant Property

At present, commercial artificial biological valves are mostly prepared by crosslinking bovine or porcine pericardia with glutaraldehyde. Swim bladder has similar components and lower immunogenicity compared to bovine or porcine pericardium. In this study, we used a glycidyl methacrylate (GMA)–based radical polymerization method to crosslink decellularized swim bladders. Amino and carboxyl groups in the swim bladder were reacted with epoxy groups on GMA to introduce carbon–carbon double bonds to the swim bladder. The results showed that the platelet adhesion of GMA-crosslinked swim bladders (GMA-SBs) decreased by 35%, as compared to that of glutaraldehyde-crosslinked swim bladders (GLUT-SBs). Moreover, the superior anticoagulant property was further verified by the ex vivo arteriovenous shunt assay. Meanwhile, the subcutaneous implantation in rats showed that GMA-SBs were able to effectively inhibit the calcification compared with GLUT-SBs. In conclusion, GMA-SBs showed improved antithrombotic and anticalcification properties compared to GLUT-SBs.

Curing Process of Epoxy Resin Using Low Molecular Polyamide 651 as Curing Agent

2014 ◽  
Vol 936 ◽  
pp. 63-66 ◽  
Author(s):  
Chun Hua Han ◽  
Lin Wang ◽  
Dong Yu Zhao
Keyword(s):  
Epoxy Resin ◽  
Room Temperature ◽  
Curing Agent ◽  
Curing Process ◽  
Curing Conditions ◽  
Temperature Spectra ◽  
Infrared Spectral ◽  
Ft Ir ◽  
Ir Analysis ◽  
Epoxy Groups

In this paper low molecular polyamide 651(PA651) is used as the curing agent of epoxy resin. The optimum curing conditions and dosage of the curing agent are obtained by DMA and FT-IR analysis. Based on the dynamic mechanical temperature spectra of samples test, the best curing conditions are room temperature 2 hours, 70°C 2 hours, 125°C 2.5 hours and 150°C 1 hours (RT / 2 h + 70 °C / 2 h +125°C / 2.5 h + 150 °C / 1 h). The best dosage of curing agent PA651 is 50 wt %. Since the analysis of Fourier Infrared spectral verified that epoxy groups react completely, the curing conditions are the best curing process.

Preparation of Waterborne Epoxy Resin Emulsion

2012 ◽  
Vol 610-613 ◽  
pp. 494-497 ◽  
Author(s):  
Hao Ran Zhou ◽  
Xiao Jiao Liu ◽  
Cui Guo ◽  
Yun Fei Yang
Keyword(s):  
Fourier Transform ◽  
Epoxy Resin ◽  
Main Chain ◽  
Water Soluble ◽  
Toluene Diisocyanate ◽  
Carboxyl Groups ◽  
Waterborne Epoxy ◽  
Infrared Spectrometer ◽  
Waterborne Epoxy Resin ◽  
Dimethylol Propionic Acid

Waterborne epoxy resin was prepared through introducing hydroxyl and carboxyl groups in the main chain of epoxy resin with the bisphenol epoxy resin, toluene diisocyanate and 2,2-dimethylol propionic acid by self-emulsification. Analyzed the structure of products via Fourier transform infrared spectrometer, then to test the water-soluble and stability. And the best conditions of reaction were determined through studying the influence of material ratio, reaction time and reaction temperature to products. The result shows that the synthesized waterborne epoxy resin has favorable stability and water-dispersion.

NANOSTRUCTURED EPOXY-BASED ANTICORROSIVE COATINGS

2020 ◽  
Vol 27 (09) ◽  
pp. 1950202
Author(s):  
MARÍA TERESA RAMÍREZ-PALMA ◽  
GENOVEVA HERNÁNDEZ-PADRÓN ◽  
JOSÉ MOJICA GÓMEZ ◽  
FERNANDO ROJAS-GONZÁLEZ ◽  
VÍCTOR M. CASTAÑO
Keyword(s):  
Thermal Stability ◽  
Epoxy Resin ◽  
Functional Groups ◽  
Abietic Acid ◽  
Carboxyl Groups ◽  
Surface Adhesion ◽  
Corrosion Performance ◽  
Epoxy Ring ◽  
Thermal Stabilities ◽  
Anticorrosive Coatings

A functionalized epoxy resin (DGEBA) was synthesized from abietic acid, through the esterification and condensation reactions between the carboxyl groups of abietic acid and the basic functional groups of an epoxy resin. This method of synthesis increases the epoxy resin surface adhesion, as well as the chemical and thermal stability, for being used as a protective coating against corrosion of copper plates. Characterization analyses included FTIR and SEM of both raw and functionalized epoxy resin substrates performed. The corrosion performance of these coatings when applied onto Cu and stainless plates was tested in terms of: (i) immersion in a misty saline chamber, under accelerated corrosive conditions; (ii) Taber abrasion and (iii) hardness, adhesion and potentiodynamic polarization. The obtained results indicate the existence of a chemical bond between the epoxy ring and the carboxyl functional groups of abietic acid. This chemical bonding provided an increased adhesion as well as better chemical and thermal stabilities than those of the original resin. The corrosion resistance lining the functionalized epoxy resin films indicated that their anticorrosive efficiency was up to 30% higher than that of the functionalized resin.

A novel epoxy-functionalized hyperbranched polysiloxane (HPSi) endowing methyl phenyl silicone resin (Si603)/epoxy systems with enhanced compatibility and fire retardancy performance

RSC Advances ◽  
2015 ◽  
Vol 5 (118) ◽  
pp. 97413-97421 ◽  
Author(s):  
Pei Jia ◽  
Hanchao Liu ◽  
Youchuan Wang ◽  
Xufu Cai
Keyword(s):  
Epoxy Resin ◽  
Silicone Resin ◽  
Fire Retardancy ◽  
Hyperbranched Polysiloxane ◽  
Epoxy Groups ◽  
Epoxy Systems ◽  
Methyl Phenyl

A novel hyperbranched polysiloxane (HPSi) with a great amount of epoxy groups was synthesized as a compatibilizer of epoxy resin (EP)/methyl phenyl silicone resin (Si603) blends.

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