Electroactive polymers

Sentence about endodontics For filling root canals, two main materials are used which are core materials and sealers. Sealers are placed between the dentinal canal walls and the core material. As for core materials, they fill the major part of the prepared canal. According to Ideal properties of obturating materials suggested by Grossman (citation - table), there is no material that satisfy all these criteria. However, one material is universally accepted as a primary obturating material, which is

nanocapsules. Nanospheres are solid, monolithic spheres made of dense polymer matrix, wherein the active ingredient is dispersed, while nano-capsules creating reservoirs, made of polymer membrane contiguous the drug in solid or liquid form (Bucolo and Salomone, 2012). The drug absorption mechanism from nano-spheres or nano-capsules after their application to conjunctival sac includes dispersion of the drug and degradation of the polymer (Rathore, and Nema, 2009). The advantages of nanoparticles as an

SOUMYA RANJAN SAHOO 711CH1025 NIT, ROURKELA SYNTHETIC GECKO ADHESIVE ATTACHMENTS Patent Number: US20120107570 A1 Publication Date: Mar3, 2012 Inventors: Russell Frederick Ross, Ronald S. Fearing, Brian G. Bush ABSTRACT: The study of the mechanism of the controlled adhesion of geckos is necessary for the design and fabrication of bio-inspired dry and reversible adhesive surfaces. The maximum performances in gecko-inspired devices are depended on Distributing loads between patches. The adhesive material

Monomer and end capper was synthesized according to known literature procedures [10,11]. The conjugated polymer with two side-chain thiol groups was also synthesized by nickel mediated polymerization method [12,13]. A schematic representation of the synthesis of monomer, end capper, polymer was shown in Scheme 2. 2.2.1. 2,7-Dibromo-9H-fluorene (1) Fluorine (300.8 mmol, 50.0 g) and CHCl3 (450 mL) was taken in the 1 liter round-bottom flask, wrapped with aluminum foil. The solution was cooled to 0

There have been a significant development in the field of hydrogels made from 2-hydroxyethyl methacrylate (HEMA). HEMA is the monomer of the polymer poly2-hydroxyethylmethacrylate.This polymer has the remarkable property to get swelled due to the molecule’s hydrophilic pendant group when subjected to water. It is capable of absorbing water from 10 to 600% relative to the dry weight. Because of its unique property, it was one of the first material to be used in contact lenses. Xanthan gum is a polysaccharide

combination of these mechanisms. Pellets coated with polymer not soluble under gi conditions releases drug by 4 different mechanisms: 1. Solution/ diffusion through the continuous plasticized polymer phase This mechanism is based on assumption that the polymer forms a continuous phase in which the plasticizer & other additives are homogeneously dispersed. When polymer film is formed, it contains molecular sized openings between crosslinked chains of polymer. Plasticizer & other additives affects wetting

opportunity to partake in undergraduate research involving hydrogels and their characteristics in Dr. Stevin Gehrke’s lab. In this lab, I create and characterize various polymer based hydrogels by way of click chemistry using multiple crosslink wavelengths and times as well as varying concentrations of different monomers, polymers, and photoinitiators. I perform mechanical assessments that include measurement of swelling degrees and compression testing to determine various moduli for characterization

The understanding that by adding designed shape or interaction anisotropy to nanoparticles will further increase possible packing schemes to the motifs in their self-assembly process. Therefore, the understanding of how individual anisotropy scale up to build complex structures are of desperate desire for designing creative particles to be transformed into materials with desired properties. Precisely defined giant molecules are providing a substantial enrichment of the library of nanoparticles with

food that we eat, and thousands of other simple and confusing things depend on chemistry. In this particular case, the relationship between Polyvinyl Alcohol (PVA) and Sodium Borate (Borax) is being investigated. PVA is a water soluble synthetic polymer (Maciborski, and Salamone), while Borax is a natural mineral with many household uses. It can be used as herbicide, to bleach teeth, as a household cleaner, and a

PHASE BEHAVIOR:- Melting Point:- The temperature at which polymer transmit into crystalline form to determine the melting point. The polymer of low-molecular substance exist very low melting point and this happened when polymer chain is dispersed. In physical state melting point is very difficult to calculate. Polymer will decompose at high temperature rather than melts. It is also known as crystalline melting temperature. Glass Transition