Synthesis and characterization of modified poly(methyl methacrylate)/Al2O3nanocomposites as denture resins

2011 ◽  
Vol 31 (2-3) ◽  
Author(s):  
Mohammad Reza Saboktakin ◽  
Roya M. Tabatabaie ◽  
Abel Maharramov ◽  
Mohammad Ali Ramazanov
Keyword(s):  
Methyl Methacrylate ◽  
Analysis Data ◽  
Inorganic Materials ◽  
Infrared Analysis ◽  
Core Shell ◽  
Poly Methyl Methacrylate ◽  
The Core ◽  
Microscopy Image ◽  
Derived Properties

AbstractHybrid materials, which consist of organic-inorganic materials, are of profound interest owing to their unexpected synergistically derived properties. Aluminum oxide (Al2O3) nanoparticles/polymer composites have been produced using a one-system polymer synthesis. The linear polymer, poly(methyl methacrylate) (PMMA,MW=15,000 g/mol) is applied for the stabilization of Al2O3nanoparticles. Fourier transfer infrared analysis data and scanning electron microscopy image reveal that the core shell structure of the Al2O3/PMMA nanocomposite has been synthesized. The ratio of concentration of the capping polymer material to the concentration of the Al2O3precursor could control the size of Al2O3nanoparticles. With specific concentration of the reductant, the core-shell nanostructure could be fluctuated in order.

scholarly journals Well Defined Poly(Methyl Methacrylate)-Fe3O4/Poly(Vinyl Pivalate) Core–Shell Superparamagnetic Nanoparticles: Design and Evaluation of In Vitro Cytotoxicity Activity Against Cancer Cells

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2868
Author(s):  
Graciane Resende ◽  
Gabriel V. S. Dutra ◽  
Maria S. B. Neta ◽  
Olacir A. Araújo ◽  
Sacha B. Chaves ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Cell Lines ◽  
Shell Structure ◽  
In Vitro Cytotoxicity ◽  
Core Shell ◽  
Seeded Emulsion Polymerization ◽  
Poly Methyl Methacrylate ◽  
The Core

The objective of this work is to develop and characterize polymeric nanoparticles with core–shell morphology through miniemulsion polymerization combined with seeded emulsion polymerization, aiming at the application in the treatment of vascular tumors via intravascular embolization. The synthesis of the core–shell nanocomposites was divided into two main steps: (i) Formation of the core structure, consisting of poly(methyl methacrylate)/magnetic oxide coated with oleic acid (OM-OA) via miniemulsion and (ii) shell structure produced through seeded emulsion polymerization of vinyl pivalate. Nanocomposites containing about 8 wt.% of OM-OA showed high colloidal stability, mean diameter of 216.8 nm, spherical morphology, saturation magnetization (Ms) of 4.65 emu·g−1 (57.41 emu·g−1 of Fe3O4), preserved superparamagnetic behavior and glass transition temperature (Tg) of 111.8 °C. TEM micrographs confirmed the obtaining of uniformly dispersed magnetic nanoparticles in the PMMA and that the core–shell structure was obtained by seeded emulsion with Ms of 1.35 emu·g−1 (56.25 emu·g−1 of Fe3O4) and Tg of 114.7 °C. In vitro cytotoxicity assays against murine tumor of melanoma (B16F10) and human Keratinocytes (HaCaT) cell lines were carried out showing that the core–shell magnetic polymeric materials (a core, consisting of poly(methyl methacrylate)/Fe3O4 and, a shell, formed by poly(vinyl pivalate)) presented high cell viabilities for both murine melanoma tumor cell lines, B16F10, and human keratinocyte cells, HaCaT.

scholarly journals Synthesis and Characterization of a Core-Shell Copolymer with Different Glass Transition Temperatures

Fibers ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 71
Author(s):  
Panagiotis Goulis ◽  
Ioannis A. Kartsonakis ◽  
Costas A. Charitidis
Keyword(s):  
Glass Transition ◽  
Methyl Methacrylate ◽  
Methacrylic Acid ◽  
Aqueous Media ◽  
Synthesis And Characterization ◽  
Core Shell ◽  
Experimental Procedure ◽  
The Core ◽  
Copolymer Poly

The aim of this study is to synthesize an organic core-shell co-polymer with a different glass transition temperature (Tg) between the core and the shell that can be used for several applications such as the selective debonding of coatings or the release of encapsulated materials. The co-polymer was synthesized using free radical polymerization and was characterized with respect to its morphology, composition and thermal behavior. The obtained results confirmed the successful synthesis of the co-polymer copolymer poly(methyl methacrylate)@poly(methacrylic acid-co-ethylene glycol dimethacrylate), PMMA@P(MAA-co-EGDMA), which can be used along with water-based solvents. Furthermore, the Tg of the polymer’s core PMMA was 104 °C, while the Tg of the shell P(MAA-co-EGDMA) was 228 °C, making it appropriate for a wide variety of applications. It is worth mentioning that by following this specific experimental procedure, methacrylic acid was copolymerized in water, as the shell of the copolymer, without forming a gel-like structure (hydrogel), as happens when a monomer is polymerized in aqueous media, such as in the case of super-absorbent polymers. Moreover, the addition and subsequent polymerization of the monomer methyl methacrylate (MAA) into the mixture of the already polymerized PMMA resulted in a material that was uniform in size, without any agglomerations or sediments.

Preparation and Application of Core-Shell PMMA/Chitosan Nanoparticle

2012 ◽  
Vol 535-537 ◽  
pp. 271-274 ◽  
Author(s):  
Bi Ying Sha ◽  
Qing Shan Liu ◽  
Lin Cheng ◽  
Xiao Ying Yin
Keyword(s):  
Methyl Methacrylate ◽  
Core Shell ◽  
Active Ingredients ◽  
Shell Nanoparticles ◽  
Poly Methyl Methacrylate ◽  
The Core ◽  
Tert Butylhydroperoxide ◽  
Chitosan Nanoparticle ◽  
Apocynum Venetum ◽  
Core Shell Nanoparticles

Abstract: Objective To separate and enrich compounds from Apocynum venetum L. leaves. Methods The core-shell nanoparticles consisting of poly (methyl methacrylate) (PMMA) cores surrounded by various chitosan shells, induced by a tert-butylhydroperoxide (TBHP) solution. And core-shell nanoparticles was applied to immobilize Alpha glycosidase enzymes. Some compound from the extrat of Apocynum venetum L. leaves were absorbed by the immobilized Alpha glycosidase enzymes. and the components absorbed were detected by HPLC. Results Hyperoside and trifolin can be adsorbed by the nanoparticles immobilized Alpha glycosidase enzymes. Conclusion The method applied to separate and preconcentrate Apocynum leaves’ active ingredients is feasible.

Characterization of the core of polystyrene block poly(methyl methacrylate) polymer micelles by energy transfer

1993 ◽  
Vol 26 (23) ◽  
pp. 6255-6260 ◽  
Author(s):  
Jean Duhamel ◽  
Ahmad Yekta ◽  
Shaoru Ni ◽  
Yariv Khaykin ◽  
Mitchell A. Winnik
Keyword(s):  
Energy Transfer ◽  
Methyl Methacrylate ◽  
Polymer Micelles ◽  
Poly Methyl Methacrylate ◽  
The Core
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