Synthesis and characterization of free radical cured Bis-methacryloxy bisphenol-A epoxy networks

1983 ◽  
Vol 4 (2) ◽  
pp. 120-125 ◽  
Author(s):  
I. Yilgör ◽  
E. Yilgör ◽  
A. K. Banthia ◽  
G. L. Wilkes ◽  
J. E. McGrath
Keyword(s):  
Free Radical ◽  
Bisphenol A ◽  
Synthesis And Characterization ◽  
Epoxy Networks

Synthesis and Characterization of Some Novel Homo- and Hetero-Diradicals of Hydrazyl and Nitroxide Type

2007 ◽  
Vol 60 (3) ◽  
pp. 173 ◽  
Author(s):  
Petre Ionita ◽  
Floriana Tuna ◽  
Marius Andruh ◽  
Titus Constantinescu ◽  
Alexandru T. Balaban
Keyword(s):  
Free Radical ◽  
Potassium Permanganate ◽  
Lead Dioxide ◽  
Magnetic Behaviour ◽  
Synthesis And Characterization ◽  
Stable Free Radical ◽  
Ms Analysis ◽  
New Compounds

Starting from the well known stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH; 2a) and its congener 2,2-diphenyl-1-(4-cyano-2,6-dinitrophenyl)hydrazyl 2b, or from their reduced hydrazine counterparts 1a,b, it was possible to obtain the p-quinonoid compounds 4a,b by oxidation with ceric (Ce4+) sulfate, which by reduction gave the corresponding hydroxyl derivatives 2-phenyl-2-(4-hydroxyphenyl)-1-picrylhydrazine 5a or 2-phenyl-2-(4-hydroxyphenyl)-1-(4-cyano-2,6-dinitrophenyl)hydrazine 5b. These hydroxyl derivatives (5a,b) react with 4-carboxy-TEMPO or 2,2-diphenyl-1-(4-carboxy-2,6-dinitrophenyl)hydrazine to form the corresponding esters 6a,b or 8a,b. These esters (6a,b and 8a,b) lead to the hybrid hetero diradicals (nitroxide–hydrazyl type) 7a,b or homo biradicals (hydrazyl–hydrazyl type) 9a,b by oxidation with lead dioxide or potassium permanganate. The new compounds were characterized by UV-vis, NMR, EPR, and MS analysis, and their magnetic behaviour was investigated.

Synthesis and characterization of hyperbranched associative polyacrylamide

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39522-39529 ◽  
Author(s):  
Wanfen Pu ◽  
Daijun Du ◽  
Rui Liu ◽  
Jiongyi Gu ◽  
Kewei Li ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Functional Monomer ◽  
Free Radical Copolymerization ◽  
Ultrafine Silica ◽  
Hyperbranched Polyamide

HDPAM was synthesized by water free-radical copolymerization based on functional hyperbranched polyamide-modified ultrafine silica as functional monomer.

Synthesis and Characterization of Core Cross-Linked Star Clusters by Conventional Free-Radical Polymerization

2007 ◽  
Vol 40 (22) ◽  
pp. 7819-7826 ◽  
Author(s):  
Tor Kit Goh ◽  
Adrian P. Sulistio ◽  
Anton Blencowe ◽  
Jeffery W. Johnson ◽  
Greg G. Qiao
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Star Clusters ◽  
Free Radical Polymerization ◽  
Synthesis And Characterization

scholarly journals Synthesis and thermal characterization of luminescent hybrid composites based on bisphenol A diacrylate and NVP

2019 ◽  
Vol 138 (6) ◽  
pp. 4463-4473 ◽  
Author(s):  
Renata Łyszczek ◽  
Beata Podkościelna ◽  
Agnieszka Lipke ◽  
Agnieszka Ostasz ◽  
Andrzej Puszka
Keyword(s):  
Bisphenol A ◽  
Lanthanide Complexes ◽  
Hybrid Composites ◽  
Thermal Characterization ◽  
Synthesis And Characterization ◽  
Photoluminescence Properties ◽  
Constant Concentration ◽  
Volatile Products ◽  
Active Diluent

Abstract The synthesis and characterization of luminescent hybrid composites based on bisphenol A glycerolate (1 glycerol/phenol) diacrylate (BPA-Acr) as a cross-linking monomer and N-vinylpyrrolidone (NVP) as an active diluent, in the presence of UV initiator (Irgacure 651), are presented. Eu(III) and Tb(III) carboxylate complexes were added as luminescent components of composites. In their preparation, a constant concentration of the initiator (1%) and the BPA-Acr to NVP (10:3) ratio were applied. The structures of the obtained materials were confirmed by the infrared spectra (ATR-FTIR). Thermal properties of the cross-linked products were determined by different thermal analysis methods in air and nitrogen (TG–DTG–DSC and TG–FTIR). Thermal stability, pathways of thermal decomposition and volatile products of degradation were determined. Photoluminescence properties of the lanthanide complexes and the obtained composites were established. These materials can have the potential application as coatings filtering harmful UV radiation.

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