Polymer

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

However, polymers are also known for their low thermal conductivity, relatively high flammability, most often accompanied by the production of corrosive or toxic gases and smoke during combustion. Consequently, improving the thermal properties and fire retardant behaviour of polymers is a major challenge for extending their use to most applications. The most of the polymers have thermal conductivity less than 0.5 W/m K. Improved thermal conductivity in polymers may be achieved either

1.1 Introduction: Polymer is derived from the Greek word. It can be broken down into “Poly” means “many” and “mer” means “units. This shows that a polymer has small units called monomers in its chemical composition which are bound together to form a large molecule. Depending on the arrangement of different chains and how they are joined, polymers can be classified as:  Thermoplastics  Thermosets  Elastomers 1.2 Types of Polymers replacing Metallic Components in Consumer Application: To make our

I. Concept – Properties of the polymers are determined by the molecular structure that comprises these polymers (Structure-Property Relationships). A precise conclusion of the properties can be obtained if we have exact information about its chemical structure and the force that prevails between the atoms and the molecules (intermolecular and intramolecular forces) Structure of the polymer can be described at various levels. From the chemical structure (i.e. its molecular formula) it can be determined

Polymers Polymers are large molecules with large molar masses and are composed of many repeating subunits. Also referred to as macromolecules, polymers both synthetic and natural have a broad range of properties which play a vital role in everyday life. Polymers range from naturally occurring biopolymers such as DNA, proteins, cellulose and starches to synthetic plastics including polystyrene and polyethylene (Shakhashiri). Polymers are synthesised using a chemical process known as polymerisation

Since the beginning Polymers have been with us; they form the very basis of life. Until the middle of the 20thcentury we were unaware but slowly and gradually we began to understand the true nature of polymers. This understanding came with the development of plastics, which are materials truly mady by man that are the ultimate tribute to man’s creativity and ingenuity. The use of polymeric materials has permeated in every facet of our lives. It is hard to visualize today’s world with all its

about polymers and their monomer units. Polymers are substances containing a large number of structural units joined by the same type of linkage. The small molecules that make up these polymer chains are called monomers. Polymers in the natural world have been around since the beginning of time and are found many places in nature. Starch, cellulose, and rubber all possess polymeric properties. Cellulose and starch are actually polymers of glucose which is a monosaccharide. Man-made polymers (also

energy cost as well as decreasing availability of petroleum based polymers; the researchers have been accelerated to search viable alternatives to reduce the burden of ecosystem. To date, intensified research have been conducted in biodegradable polymeric materials from natural resources in order to fulfil the requirements set by environmental regulation to develop a more sustainable and benign material [9, 5].Biodegradable polymers are obtained from natural resources like cellulose, starch or by

in the form of a polymer (Chemistryexplained.com, 2016). The ‘discovery’ of polymers began in 1920, with the belief of Hermann Staudinger, that there existed a molecule consisting of many smaller repeating molecules, under the name ‘macromolecule’ (Chemistryexplained.com, 2016). Nowadays, polymer and plastic demand is even higher than that of copper, aluminium, and even steel, due to their versatile applications in many different industries (Matse1.matse.illinois.edu, 2016). Polymer synthesis can be

Polymer composites are the blend of polymers and filler materials. Disadvantages of polymers such as low mechanical and electronic properties can be improved through reinforcing with much stronger and highly conducting filler materials. Thus, fabricating polymer composites is of mutual benefit to both polymers and fillers. Furthermore, advanced-desired applications can be tailor-made. Also, compared to polymer micro/nanocomposites, polymer nanocomposites show much more improved properties such as