A look at polymers their sources and different uses

The first synthetic manufactured plastic was Bakelite, created in for telephone casing and electrical components. Polymers with three blocks, each of a different chemical species e. The growing importance of these fields makes the interdisciplinary aspect of polymer research abundantly clear.

Almost everyone is already in contact with biomaterials. Chain length[ edit ] The physical properties [24] of a polymer are strongly dependent on the size or length of the polymer chain.

Similarly, catheters, syringes, diapers, blood bags, and many other trappings of modern medicine depend heavily on polymeric materials. Obviously not all polymers are transparent. The simplest definition of a polymer is a useful chemical made of many repeating units.

Traditionally, crowns for teeth in the back of the mouth, where strength is more important than appearance, have been cast from alloys of mercury with silver or gold.

In many cases, the properties and their usage were discovered only recently. The phosphorylcholine group can also be added as a plasticizer in polyurethanes and other polymers.

Other common manufactured polymers have backbones that include elements other than carbon. Efforts are now under way to design polymer implants that will slowly degrade inside the human body, releasing cancer-fighting drugs in the process.

Both oil and natural gas can be used to make polyethylene for example. A persuasive argument can be made that biomaterials development is poised for a revolutionary change. The topmost layer is a polyester film, colored to match the skin.

Structuring Agents Structuring agents that add rigidity include natural and synthetic waxes, lanolin, long-chain fatty alcohols, and triglycerides.

Scientists and engineers are always producing more useful materials by manipulating the molecular structure that affects the final polymer produced. It is a thermosetting plastic. The emerging science of tissue engineering, for example, will depend directly on the development of new biologically active polymeric matrices to guide the controlled generation or regeneration of skin, cartilage, liver, and neuronal tissue.

At the macro-scale, they describe how the bulk polymer interacts with other chemicals and solvents. The most common products are devices such as catheters and intravenous lines, nearly million of which are used annually in the United States. But, compared to the density of stone, concrete, steel, copper, or aluminum, all plastics are lightweight materials.

The general field of load-bearing implants involves metals, ceramics, and polymers, and the field has advanced rapidly in recent years.

The other group, the thermosets, cannot be remelted. The Structure of Polymers Many common classes of polymers are composed of hydrocarbons, compounds of carbon and hydrogen. The molecular genetic code uses only four purine and pyrimidine bases to dictate the structure of the proteins that make up so much of living systems.

Laboratory synthesis of biopolymers, especially of proteinsis an area of intensive research. Types of Polymers and Their Uses. Authors; Authors and affiliations; T. R. Crompton; Chapter. however, have achieved commercial importance.

Some of the polymers that have achieved commercial importance and their uses are tabulated in Table 1 and some of their important physical properties are listed in Appendix 2. available polymers and their versatile uses. Keywords: Natural polymers, Pharmacy, Xanthan gum, Chitosan, Ispaghula, discussed here to take a closer look at their applications in pharmacy and other fields.

Xanthan gum 2,5,6,8,9,11 two different polysaccharides named. Introduction to polymers. Where polymer manufacture is different is in the range of sources of the basic building blocks for the polymer repeat units. Both oil and natural gas can be used to make polyethylene for example.

In parallel with the advances that have been made in polymerization and polymer structures, there have been major.

Example of Synthetic Polymers and their Uses(bakelite: a Thermosetting Plastic.) Another important Synthetic polymer is Bakelite which is Phenol- Formaldehyde Resin. It is a thermosetting plastic.

It is believed to be first true plastic. It can be melted and remolded again. It is cheap, durable and strong.

Polymers and Cosmetics

A Look at Polymers, Their Sources and Different Uses. words. 1 page. The Mystery and Controversy Surrounding the Issue of UFOs in the United States. words. 1 page. The Historic Docking of the Apollo and Soyuz Capsule in Space. words. 2 pages. A Look at Polymers, Their Sources and Different Uses PAGES 1.

WORDS View Full Essay. More essays like this: use of polymers, sources of polymers, use of rayon, cellulose acetate. Not sure what I'd do without @Kibin - Alfredo Alvarez, student @ Miami University.

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Polymers and plastics: a chemical introduction