Electroactive polymers

are materials that range in size from one to one hundred in nanometre scale. Organic polymers are macromolecules or molecules which are made up of several repeated subunits (monomers). The polymer can either be natural or synthetic. The ‘nanometer-sized polymer materials’ are described as polymer materials with sizes that range from 1 to 100 on a nanometer scale. The majority of the nanometer-sized organic polymers in various applications are formed from the combination of the organic components

3.2 Chemistry of chitin Similar to its polysaccharide nature, Chitin has a similar chemical structure as that of cellulose. It is reported to be a polymer with high molecular weight of N-acetyl-D-glucosamine units which are linked by β-D bonds, which has 1000-3000 units (Shahidi & Abuzaytoun 2005). In similarity with cellulose, chitin has an acetamido group at its C2 postion unlike cellulose which has a hydroxyl group (Shahidi & Abuzaytoun 2005). Figure 1 shows the structure of chitin, its derivative

necessary to define polymers, how they are made and the intermolecular forces that lead to polymers properties. Two polymers, Polylactic acid and polypropylene, will be explained to illustrate the connection between structure and properties. The differences and similarities will be explained, followed by the environmental and economic considerations. These factors will be used to show why Polylactic acid is preferable to other polymers for the production of water bottle. A polymer is a long chain of

Our world has become infatuated with the idea of “fast, easy, and comfortable” consumption. We’ve grown accustomed to accommodating a fast pace lifestyle but we have forgotten about the repercussions of our actions. So many products have become “single use” or disposable, from our individually wrapped food to our hygiene products. Since the discovery of plastic it has become the go to material of choice due to its cheap price of production. Unfortunately because of its high production rate and the

groups leads improvement in properties of polymers like tear resistance, abrasive resistance tensile strength and impact strength.This types of self healing materials can be used in wide variety of application such as membrane separation, automobile parts, roofing materials, coatings, food packaging. Supramolecular Polymers Supramolecular polymers are synthesised from low molecular mass monomers which are joined by reversible non-covalent bonds and gets a polymer which have good mechanical and rheological

Abstract: With the emergence of more novel and effective drug therapies, increased importance is being placed upon the methods by which these drugs are being delivered to the body. Different methodologies have been heavily investigated as possible solutions , one of these methods are intelligent or ‘Smart polymeric drug-delivery systems’. “Stimuli responsive” and “self regulating” drug delivery systems have captured the imagination of researchers, in large part because they suggest a means to mimic

A polymer is a large molecule that is made from many small repeating chemicals called monomers. In the Greek language, polymer literally means “many parts.” Polymers are being used more and more in medical devices, such as drug delivery, screws, plates, fixation pins, suture anchors and many other applications. Some of the most useful polymers for medical uses are poly(lactic acid) (PLA) and poly(glycolic acid) (PGA). They are useful in medicine because of the fact that they can degrade within the

1.INTRODUCTION “A combination of two or more materials (reinforcement, resin, filler, etc),differing in form or composition on a macro scale”. They usually consist of high performance fibres as reinforcing phases and polymers or metals as matrices. Generally two phases of composite they are matrix phase and reinforcement phase or dispersed phase. Matrix is the primary phase, having a continuous character, and its usually more ductile and less hard phase, it hold the dispersed phase and shares

Introduction Cancer disease is one the most complicated fatal disease which scientists are looking for methods to either stop or cure this malady (Hook, Ptak, Farrell, Hinkal, Panaro and Grodzinski, 2010). Based on the cancer overlook disease, the cells are transformed and infected to cancer after a while and it starts to metastasize and proliferate (ibid). The cardinal issue is that how cancer may occur based on transformation of cells and genes. To illustrate that question, there are two factors

All other chemicals were of analytical grade and were used as received. The co-polymer poly(3-hydroxybutyrate-co-ε-caprolactone) (PHB-co-CL, Mw = 2kDa) was obtained by transesterification reaction from PHB and PCL, and was kindly supplied by Professor Dr. Juan Pedro