The role of polyvinyl alcohol in emulsion polymerization

1993 ◽  
Vol 30 (4) ◽  
pp. 513-517 ◽  
Author(s):  
Ken Yuki ◽  
Toshiaki Sato ◽  
Hitoshi Maruyama ◽  
Junnosuke Yamauchi ◽  
Takuji Okaya
Keyword(s):  
Polyvinyl Alcohol ◽  
Emulsion Polymerization

Role of a polyvinyl alcohol addition in the production of copper powder by electrolysis

1979 ◽  
Vol 18 (6) ◽  
pp. 353-356
Author(s):  
A. V. Pomosov ◽  
E. E. Usol'tseva ◽  
T. A. Koshkarova
Keyword(s):  
Polyvinyl Alcohol ◽  
Copper Powder

Retarding Bioactivity Effect of Ciprofloxacin Incorporated in Polyvinyl Alcohol/Bioglass Scaffold as Bone Graft

2015 ◽  
Vol 1104 ◽  
pp. 163-167 ◽  
Author(s):  
Salha Boulila ◽  
Hassane Oudadesse ◽  
Bertrand Lefeuvre ◽  
Khansa Chaabouni ◽  
Fatima Makni-Ayedi ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Biomedical Applications ◽  
Potential Role ◽  
Icp Oes ◽  
Rapid Reduction ◽  
Physico Chemical ◽  
Before And After ◽  
Osteoinductive Property ◽  
Apatitic Phase

The biomaterials are used for many biomedical applications. The main objective of the present work was to investigate the potential role of Bioglass (Melting)- Polyvinyl alcohol (BG (M)-PVA) and Bioglass (Melting)-Polyvinyl alcohol-20%Ciprofloxacin (BG (M)-PVA-20Cip) in regenerative bone capacity. These composites were implanted in the femoral condyles of Wistar rats and compared to that of ovariectomised groups. Our results noted, after the different period of implantation (15, 30, 60 and 90 days), that the Alkaline phosphatase (ALP) and Acid phosphatase (ACP) activities showed an excellent osteoinductive property of BG (M)-PVA, that this phenomena decreased with the presence of ciprofloxacin. Physico-chemical techniques (ICP-OES and SEM) were engaged to highlight the influence of antibiotic on the structure, porosity and bioactivity of a porous Glass-PVA before and after implantation. The results obtained by ICP-OES showed a rapid reduction in silicon (Si) and sodium (Na), and noted an accelerator increase in calcium (Ca) and phosphorus (P) ion concentrations in BG (M)-PVA that the BG (M)-PVA-20Cip. This result is confirmed by SEM. We can conclude that the loading of ciprofloxacin in BG (M)-PVA is characterized by a retard effect of formation of apatitic phase.

Ternary composites of polyaniline with polyvinyl alcohol and Cu by inverse emulsion polymerization: A comparative study

2018 ◽  
Vol 37 (8) ◽  
pp. 3448-3459 ◽  
Author(s):  
Rizwan Ullah ◽  
Salma Bilal ◽  
Anwar-ul-Haq Ali Shah ◽  
Gul Rahman ◽  
Khurshid Ali
Keyword(s):  
Polyvinyl Alcohol ◽  
Comparative Study ◽  
Emulsion Polymerization ◽  
Inverse Emulsion Polymerization ◽  
Inverse Emulsion

scholarly journals The Role of Nanoparticle Shapes and Structures in Material Characterisation of Polyvinyl Alcohol (PVA) Bionanocomposite Films

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 264 ◽  
Author(s):  
Mohanad Mousa ◽  
Yu Dong
Keyword(s):  
Polyvinyl Alcohol ◽  
Three Dimensional ◽  
Halloysite Nanotubes ◽  
Mechanical And Thermal Properties ◽  
Cloisite 30B ◽  
Bionanocomposite Films ◽  
The Impact ◽  
Nanoparticle Shapes ◽  
Selection Of

Three different types of nanoparticles, 1D Cloisite 30B clay nanoplatelets, 2D halloysite nanotubes (HNTs), and 3D nanobamboo charcoals (NBCs) were employed to investigate the impact of nanoparticle shapes and structures on the material performance of polyvinyl alcohol (PVA) bionanocomposite films in terms of their mechanical and thermal properties, morphological structures, and nanomechanical behaviour. The overall results revealed the superior reinforcement efficiency of NBCs to Cloisite 30B clays and HNTs, owing to their typical porous structures to actively interact with PVA matrices in the combined formation of strong mechanical and hydrogen bondings. Three-dimensional NBCs also achieved better nanoparticle dispersibility when compared with 1D Cloisite 30B clays and 2D HNTs along with higher thermal stability, which was attributed to their larger interfacial regions when characterised for the nanomechanical behaviour of corresponding bionanocomposite films. Our study offers an insightful guidance to the appropriate selection of nanoparticles as effective reinforcements and the further sophisticated design of bionanocomposite materials.

scholarly journals Enhancement of Diversity in Production and Application Utilizing Electrolytically Polymerized Rubber Sensors with MCF: 1st Report on Consummate Fabrication Combining Varied Kinds of Constituents with Porous Permeant Stocking-Like Rubber

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4658 ◽  
Author(s):  
Kunio Shimada ◽  
Ryo Ikeda ◽  
Hiroshige Kikura ◽  
Hideharu Takahashi
Keyword(s):  
Magnetic Field ◽  
Polyvinyl Alcohol ◽  
Natural Rubber ◽  
Emulsion Polymerization ◽  
Magnetic Fluid ◽  
Silicone Rubber ◽  
Water Soluble ◽  
Fabrication Process ◽  
Magnetic Clusters ◽  
Chloroprene Rubber

To satisfy the requirement of haptic sensibility in rubber such as in the proposed hybrid skin (H-Skin), the authors have demonstrated a new method for solidifying rubber using electrolytic polymerization together with configured magnetic clusters of magnetic compound fluid (MCF) incorporated into the rubber by the application of a magnetic field. However, the rubber and magnetic fluid (MF) involved in the MCF rubber were water-soluble. In addition, the authors have demonstrated the practicability of using electrolytic polymerization with an emulsifier, polyvinyl alcohol (PVA), in which natural rubber (NR) or chloroprene rubber (CR) and silicone rubber (Q) can be mixed as water-soluble and water-insoluble rubbers, respectively. In this study, to enhance production, the feasibility of solidifying rubber by electrolytic polymerization is verified using varied water-insoluble rubber, varied water-insoluble MF, and varied surfactants to aid emulsion polymerization, except in the case of other kinds of rubber and MF which have been demonstrated until recent by the authors. Based on these diverse constituents, the authors propose a consummate fabrication process for multi-layered MCF rubber, which involves porous stocking-like rubber that can be permeated by any liquid. The investigation of this application is presented in the sequential second report.

scholarly journals STUDIES ON THE GENERALIZED SHWARTZMAN REACTION

1955 ◽  
Vol 102 (3) ◽  
pp. 249-261 ◽  
Author(s):  
Lewis Thomas ◽  
Joel Brunson ◽  
Richard T. Smith
Keyword(s):  
Polyvinyl Alcohol ◽  
Intravenous Injection ◽  
Dextran Sulfate ◽  
Nitrogen Mustard ◽  
Protective Action ◽  
Gram Negative ◽  
Single Intravenous Injection ◽  
Intravenous Injections ◽  
Shwartzman Reaction

Lesions indistinguishable from those of the generalized Shwartzman reaction occured in rabbits when a single intravenous injection of Gram-negative bacterial endotoxin was accompanied, or followed, by an injection of one of the following synthetic, heparin-like, acidic polymers-sodium polyanethol sulfonate, dextran sulfate, or sodium polyvinyl alcohol sulfonate. These reactions were produced by doses of polymer or of endotoxin which were without demonstrable effect when given singly. Heparin, in those similar to those previously shown to protect rabbits against the lesions of the generalized Shwartzman reaction, prevented the reaction to the combined injection of endotoxin and acidic polymers. Nitrogen mustard, which was previously shown to prevent the lesions of the generalized Shwartzman reaction from occurring after two intravenous injections of endotoxin, had no protective action against the lesions produced by the combined injection of endotoxin and polymer. Cortisone did not affect the reaction to endotoxin and polymer. The role of fibrinogen in the reaction under study is discussed in the paper which follows.

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