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 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.

Free radical copolymerization of α-fluoroacrylates for optical materials: Synthesis and characterization

2009 ◽  
Vol 47 (5) ◽  
pp. 1403-1411 ◽  
Author(s):  
Jean-Marc Cracowski ◽  
Véronique Montembault ◽  
Dominique Bosc ◽  
Bruno Améduri ◽  
Fabrice Odobel ◽  
...  
Keyword(s):  
Free Radical ◽  
Optical Materials ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Materials Synthesis ◽  
Free Radical Copolymerization

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 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.

scholarly journals Synthesis and Characterization of Some New Thermal Stable Polymers - Polymerization of N-[4-N´ -(Benzylamino-carbonyl)phenyl]maleimide

2007 ◽  
Vol 4 (2) ◽  
pp. 222-231 ◽  
Author(s):  
B. L. Hiran ◽  
Jyoti Chadhary ◽  
S. N. Paliwal ◽  
Suresh Meena ◽  
P. R. Chaudhary
Keyword(s):  
Free Radical ◽  
Thermo Gravimetric Analysis ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
H Nmr ◽  
Free Radical Initiator ◽  
Ft Ir

This article describes the synthesis and characterization of homopolymer (H-BCPM) of N-[4-N'-(benzylamino-carbonyl) phenyl] maleimide (N-BACPMI) and copolymer (C-BCPM) of N-BACPMI withn-butyl acrylate (BA). The new monomer was synthesized fromp-aminobenzoic acid, maleic anhydride and benzylamine. The homopolymerization of N-BACPMI is initiated by free radical using AIBN in THF solvent at 65°C. Radical copolymerization of N-BACPMI with BA, initiated by AIBN, was performed in THF solvent using equimolar amount. Effect of the different free radical initiator AIBN, BPO and solventsp-Dioxane, THF, DMF and DMSO was studied. Homopolymer and Copolymer were characterized by intrinsic viscosity, solubility test, FT-IR,1H-NMR spectral analysis and elemental analysis. Thermal behaviour was studied by Thermo gravimetric analysis.

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