scholarly journals Electron Beam Synthesis and Characterization of Acrylamide/Acrylic Acid Hydrogels Using Trimethylolpropane Trimethacrylate as Cross-Linker

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Gabriela Craciun ◽  
Elena Manaila ◽  
Maria Daniela Stelescu
Keyword(s):  
Electron Beam ◽  
Acrylic Acid ◽  
Dose Range ◽  
Absorbed Dose ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Free Radical Copolymerization ◽  
Swelling Properties ◽  
Cross Linker

The purpose of the paper is to present the synthesis and characterization of hydrogels prepared by free-radical copolymerization of acrylamide and acrylic acid in aqueous solutions using potassium persulfate as initiator and trimethylolpropane trimethacrylate as cross-linker, via the radiation technique. The samples were subjected to electron beam treatment in the dose range of 2 to 4 kGy and the influence of the absorbed dose and amount of cross-linker on the swelling properties, diffusion coefficient, and network parameters of hydrogels was investigated. A possible reaction mechanism for acrylamide/acrylic acid/trimethylolpropane trimethacrylate hydrogels was also suggested. The structure and morphology of hydrogels were characterized by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy.

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 castor oil based hybrid polymers and their polyurethane–urea/silica coatings

RSC Advances ◽  
2015 ◽  
Vol 5 (125) ◽  
pp. 103625-103635 ◽  
Author(s):  
Nikita Bhosale ◽  
Allauddin Shaik ◽  
Sisir Kumar Mandal
Keyword(s):  
Free Radical ◽  
Castor Oil ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Free Radical Copolymerization ◽  
Hybrid Polymers ◽  
Silica Coatings ◽  
Hybrid Polyurethane ◽  
Silica Hybrid

Novel acrylated alkoxysilane castor oil with hydrolysable –Si–OCH3 was synthesized via free radical copolymerization. This silane functional castor oil was further reacted with isocyanate to get isocyanate terminated silica hybrid polyurethane–urea prepolymer.

Synthesis and Characterization of Sodium AMPS-Based Interpenetrating Network Hydrogels for Use as Temporary Wound Dressing

2014 ◽  
Vol 894 ◽  
pp. 300-304 ◽  
Author(s):  
Juraiporn Porkaew ◽  
Runglawan Somsunan ◽  
Kanarat Nalampang ◽  
Robert Molloy
Keyword(s):  
Sulfonic Acid ◽  
Wound Dressing ◽  
Water Retention ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Poly Vinyl Alcohol ◽  
Interpenetrating Network ◽  
Free Radical Copolymerization ◽  
Water Interaction

Hydrogel is one of the most interesting materials for use as wound dressing. In this study, interpenetrating network (IPN) hydrogels were synthesized by free radical copolymerization of sodium salt of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and N-vinylpyrrolidone (NVP), in the presence of poly (vinyl alcohol) (PVOH). The incorporation of PVOH offered the hydrophilicity to the hydrogel. The polymerization was carried out using N,N-methylene-bis-acrylamide and 4,4-azo-bis (4-cyanopentanoic acid) as a crosslinker and UV-photoinitiator, respectively. The successful of polymerization was indicated by gel content which was in the range of 86 90%. The structure of prepared hydrogels was confirmed by Fourier Transform Infrared Spectroscopy. In addition, the hydrogel-water interaction was investigated by mean of water content and water retention. Manipulation of the AMPS/NVP ratio significantly altered the properties of the hydrogels. As expected, the interaction of hydrogel and water decreased as increasing of NVP contents due to this monomer provides more hydrophobic functional groups. In conclusion, it is believed that the prepared AMPS/NVP/PVOH interpenetrating network hydrogels show the potential for use as temporary wound dressing.

scholarly journals Synthesis and Characterization of Poly(Acrylamide-Co-Acrylic Acid) Flocculant Obtained by Electron Beam Irradiation

2015 ◽  
Vol 18 (5) ◽  
pp. 984-993 ◽  
Author(s):  
Gabriela Craciun ◽  
Daniel Ighigeanu ◽  
Elena Manaila ◽  
Maria Daniela Stelescu
Keyword(s):  
Electron Beam ◽  
Acrylic Acid ◽  
Electron Beam Irradiation ◽  
Synthesis And Characterization ◽  
Beam Irradiation ◽  
Poly Acrylamide
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