We develop coarse-grained force fields for poly (vinyl alcohol) and poly (acrylic acid) oligomers. In both cases, one monomer is mapped onto a coarsegrained bead. The new force fields are designed to match structural properties such as radial distribution functions of various kinds derived by atomistic simulations of these polymers. The mapping is therefore constructed in a way to take into acc...

Graft polymerization of acrylic acid onto nonwoven polypropylene (PP) fabric was carried out by a preirradiation method using a Co gamma radiation source. Results showed that 2.2'-Azobisisobutyronitrile (AIBN), its concentration was 0.2%, was very important during the grafting polymerization without removal of polymerization inhibitor of AA. The most favorable grafting polymerization conditions...

Submit Manuscript | http://medcraveonline.com Abbreviations: GPC: Gel Permeation Chromatography; FTIR: Fourier Transform Infra Red; XRD: X Ray Diffraction; HRTEM: High Resolution Transmission Electron Microscopy; TGA: Thermo Gravimetric Analysis; IEC 60520: International Electronic Commission Number 60520; BS 7655: British Standard Number 7655; PMMA: Poly Methyl Methacrylate; PC: Poly Carbonate...

This contribution presents the production of polymer-coated iron oxide magnetic nanoparticles carrying functional groups on their surface and their basic characterization. The preparation of polymer-coated nanoparticles was carried out by a two-step process. In the first step, magnetite (Fe3O4) nanoparticles were prepared by a co-precipitation method from the solutions of FeCl2.4H2O and FeCl3.6...

The kinetics of acrylic acid (AA) solution polymerization was investigated by polymerizing 30 wt % aqueous AA solutions at pH values ranging from 2.2 to 9.9. The polymerization rate was determined with differential photocalorimetry and was found to be a strong function of the solution pH and the ionic strength. Although the polymerization rate decreased with increasing pH below pH 6.5, an incre...

: A new fibrous adsorbent was prepared by grafting Acrylic Acid /Acryl Amide (AA/AAm) co-monomers onto Poly(Ethylene Terephtalat) (PET) fibers. The resulting sorbent has been characterized by Fourier Transform InfraRed spectroscopy (FT-IR), Thermo Gravimetric Analysis (TGA), Scanning Electron Microscopy (SEM) and elemental analysis and studied for the preconcentration and ...

For the purpose of increasing the permeability to oxygen and equilibrium water content in contact lenses, polar copolymers with nonionic monomers such as 2-hydroxyethle methacrylate(HEMA) Is used. By adding the polar monomers to (HEMA), the permeability to oxygen and equilibrium with water content is increased and also the absorption of proteins on lens surface is changed. In this research, the...

Debonding of denture teeth from the base has posed a great problem to clinician and patient. Chemical mechanical treatments have been performed separately, but there are no studies using combination chemical surface treatments. This study aims at evaluating comparing bond strength by 60 maxillary right central incisor were used in 5 groups for treatment on ridge lap area: 1 untreated, 2-sandbla...

Glass fiber reinforcement of the hybrid acrylic resin with difference method can enhance residual monomer content of the material; it can cause cytotoxic effect on fibroblast cells. The purpose of this study was to know the cytotoxicity of hybrid acrylic resins after glass fiber reinforcement with difference method on the cultured fibroblasts. The squared specimens of 10 mm in length, 10 mm in ...

The aim of this study was to optimize the preparation method polymethyl methacrylate (PMMA) denture base loaded with nano silver (NAg), more effectively and safely impart sustainable antibacterial functions. NAg solution synthetized mixed acrylic acid methyl methyacrylate (MMA) monomer in order prepare a new type (NS)/polymer specimens (NS/PMMA). surface morphology, mechanical strength, antimic...