Electroactive polymers

FOOD 7024 Special Studies in Food Science and Technology Assignment 2 Chitin – occurrence, chemistry, extractions, properties and uses Name: Vihang Rangrej Student number: 43620348 Due date: 4th October 2016 Word count:   1. Introduction In the race to develop alternatives in the recent era, chitin and derivatives has showed an immense potential of being used as an alternate polysaccharide source and as a biopolymer in various sectors spanned from medical and food processing to waste

POLY VINYL CHLORIDE INTRODUCTION:- WHAT IS POLY VINYL CHLORIDE? POLY VINYL CHLORIDE abbreviated to PVC is one of the three most widely used polymer in the entire world. It is classified as a thermostatic resin as they can be softened again after heating. It is very cheap and used in a wide range of collection from household things to industrial processing . Vinyl Chloride is the monomer from which PVC is polymerized. PVC has polar molecules that are attracted by electrostatic interaction such

problem: The driving forces behind this work are related to the increased use of nanopolymers for biomedical purposes. Charged and neutral polymers are routinely used for gene and drug delivery. However, limited studies are performed to test their safety. Therefore, the originality of this work lies in its attempt to evaluate the toxicity of three widely used polymers for delivery of chemotherapeutic agents. Furthermore, we aim to establish efficient methods for nanotoxicity testing through comparing

ABSTRACT: Copolymers of aniline and o-phenylenediamine / kaolinite composites were synthesized by 5:1 molar ratios of the respective monomers with different percentages of nanoclay via modified in situ chemical co-polymerization. The results were verified by measuring the FT-IR and UV-vis absorption spectra for PANI-o-PDA / kaolinite composites. The thermal behaviour of the copolymer and composites was studied. PANI-o-PDA / kaolinite composites were thermally more stable than pure copolymer. Surface

Highly porous ceramics (foams, honeycombs, fibres , mats, etc.) find numerous applications in various engineering fields, including filtration (molten metals, particulate from diesel exhaust gases), radiant burners, catalyst supports, biomedical devices, kiln furniture, reinforcement for metal matrix composites, bioreactors, thermal protection systems, supports for space mirrors, components in solid oxide fuel cells, lightweight sandwich structures, heat exchangers (graphite foams), etc. Talking

In comparison to phospholipids, surfactants offer the advantages of being relatively inexpensive and simple to store40. The bilayer structure of niosomes provides the same selective accumulation in tumor tissues, permeability to biological membranes, and controlled release as liposomes41. Niosome formulations typically require cholesterol and other membrane stabilizers to prevent aggregation and leakage of the encapsulated material. In liposome formulations, small quantities of PEG are incorporated

The use of polymers in controlling the release of drugs has become important in the formulation of pharmaceuticals. Water soluble polymers such as polyethylene glycol and polyvinylpyrrolidone may be used to increase the dissolution rates of poorly soluble drugs. Hydrogels provide the basis for implantation, transdermal and oral

Natural rubber also known as india rubber. It is made by the juice of a tree, which is coagulated using acetic acid, smoked and dried. Natural rubber consist of polymers of the organic compound isoprene with some organic compound and water. Natural rubber are used in many applications and products. This is because natural rubber contain large stretch ratio and high resilience and it is waterproof. Rubber have unique physical properties and chemical properties. Rubber’s stress strain is modelled as

Bio-based polymers are materials which are produced from renewable resources. The terms bio-based and biodegradable will be used repeatedly in the literature, however there is a key difference between the two types of materials. Biodegradable are defined as materials whose physical and chemical attributes will undergo degradation and completely deteriorate when exposed to microorganisms, aerobic processes, anaerobic processes, or both process simultaneously. On the other hand, Bio-based polymers can be

1. Segmented polyurethanes Segmented polyurethanes are a broad class of polymers whose properties range from those characteristic of tough plastics to very soft rubbers, depending on the soft segment length and concentration. Polyurethane elastomers are high quality engineering materials combining high elasticity with high hardness and low wear. It is very important to mention and understand, during working with polyurethanes that we dealing with two types of materials : plastics and elastomers