Influence of Thermodynamic Quality of a Solvent upon Non-Newtonian Viscosity of Poly(methyl Methacrylate) Solutions

2007 ◽  
Vol 16 (1) ◽  
pp. 95-102 ◽  
Author(s):  
O. Quadrat ◽  
M. Bohdanecký ◽  
P. Munk
Keyword(s):  
Methyl Methacrylate ◽  
Newtonian Viscosity ◽  
Poly Methyl Methacrylate ◽  
Thermodynamic Quality

scholarly journals Self-Assembly of Molecular Brushes with Polyimide Backbone and Amphiphilic Block Copolymer Side Chains in Selective Solvents

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2922
Author(s):  
Maria Simonova ◽  
Ivan Ivanov ◽  
Tamara Meleshko ◽  
Alexey Kopyshev ◽  
Svetlana Santer ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Methyl Methacrylate ◽  
Self Assembly ◽  
Amphiphilic Block Copolymer ◽  
Side Chains ◽  
Poly Methyl Methacrylate ◽  
Molecular Brushes ◽  
Selective Solvents ◽  
Significant Difference ◽  
Thermodynamic Quality

Three-component molecular brushes with a polyimide backbone and amphiphilic block copolymer side chains with different contents of the “inner” hydrophilic (poly(methacrylic acid)) and “outer” hydrophobic (poly(methyl methacrylate)) blocks were synthesized and characterized by molecular hydrodynamics and optics methods in solutions of chloroform, dimethylformamide, tetrahydrofuran and ethanol. The peculiarity of the studied polymers is the amphiphilic structure of the grafted chains. The molar masses of the molecular brushes were determined by static and dynamic light scattering in chloroform in which polymers form molecularly disperse solutions. Spontaneous self-assembly of macromolecules was detected in dimethylformamide, tetrahydrofuran and ethanol. The aggregates size depended on the thermodynamic quality of the solvent as well as on the macromolecular architectural parameters. In dimethylformamide and tetrahydrofuran, the distribution of hydrodynamic radii of aggregates was bimodal, while in ethanol, it was unimodal. Moreover, in ethanol, an increase in the poly(methyl methacrylate) content caused a decrease in the hydrodynamic radius of aggregates. A significant difference in the nature of the blocks included in the brushes determines the selectivity of the used solvents, since their thermodynamic quality with respect to the blocks is different. The macromolecules of the studied graft copolymers tend to self-organization in selective solvents with formation of a core–shell structure with an insoluble solvophobic core surrounded by the solvophilic shell of side chains.

scholarly journals POTENTIAL OF ANTHOCYANIN BASED POLY (METHYL METHACRYLATE) NANOPARTICLES SPECIFIC ACTIVATED MICROGLIA IN MANAGEMENT INFLAMMATORY PAIN ON HERNIATED NUCLEUS PULPOSUS: A LITERATURE REVIEW

2021 ◽  
Vol 7 (1) ◽  
pp. 40-47
Author(s):  
I Putu Eka Widyadharma ◽  
Agung Bagus Sista Satyarsa ◽  
Feliani Sanjaya ◽  
Ni Made Gitari ◽  
I Wayan Niryana ◽  
...  
Keyword(s):  
Literature Review ◽  
Methyl Methacrylate ◽  
Nucleus Pulposus ◽  
Inflammatory Pain ◽  
Emotional Experience ◽  
Literature Study ◽  
Novel Therapy ◽  
Poly Methyl Methacrylate ◽  
Tnf Α

Pain is an unpleasant sensory and emotional experience that can affect the quality of life and leads to decreased productivity in patients. Low back pain (LBP) is one of the significant causes of disability worldwide with lifelong incidence. The purpose of this literature review describes the potential of anthocyanin-based Poly (Methyl Methacrylate) (PMMA) nanoparticles as the management of inflammatory pain in the Hernia Nucleus Pulposus (HNP ). The method used is a literature study by entering the keyword. Of the 77 journals reviewed, 47 journals were found by the topic and used as a reference for this work. The anthocyanin-based PMMA nanoparticles act as anti-nociceptors by inhibiting microglia that produce inflammatory mediators in HNP. Poly (Methyl Methacrylate) nanoparticles have specific targets in microglia. Anthocyanins have the effect of inhibiting inflammatory pain through many destinations. Anthocyanin inhibits the synthesis of nitric oxide (NO ) and prostaglandin E2 (PGE 2) and inhibits the activation of p38 MAPK and NF-kB pathways that express TNF-α and IL-1β genes as anti-nociceptive. The anthocyanin-based PMMA nanoparticles have potential as a novel therapy for inflammatory pain in HNP. There has been no research between these modalities. Therefore, further research is needed to find out the exact potential of anthocyanin-based PMMA nanoparticles.

Investigations on the quality of dispersion of nanofillers in poly(methyl methacrylate) composites by creep-recovery experiments

2010 ◽  
Vol 54 (2) ◽  
pp. 407-420 ◽  
Author(s):  
Christian Triebel ◽  
Nikolaos Katsikis ◽  
Hana Stará ◽  
Helmut Münstedt
Keyword(s):  
Methyl Methacrylate ◽  
Creep Recovery ◽  
Poly Methyl Methacrylate

Comparison of the optical and visual quality of poly(methyl methacrylate) and silicone intraocular lenses

1993 ◽  
Vol 19 (6) ◽  
pp. 766-771 ◽  
Author(s):  
Michael C. Knorz ◽  
Alan Lang ◽  
Ta-Chung Hsia ◽  
Barbara Poepel ◽  
Volker Seiberth ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Visual Quality ◽  
Intraocular Lenses ◽  
Poly Methyl Methacrylate
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