In many cases, the properties and their usage were discovered only recently. This chapter covers two areas:
First human made plastic was invented by Alexander Parks in It was then called Parke sine later on Celluloid. Polymers are made of small repeating structural units called monomers.
Polyethylene is the simplest polymer, which consists of ethene ethylene as monomer units and the corresponding linear polymer is called high density polyethylene HDPE. Many polymeric materials having chain-like structures similar to polyethylene are known.
Synthetic polymers are often referred to as "plastics", well-known are polyethylene and nylon. Polymers formed by a straightforward linking together of monomer units, with no loss or gain of material, are called addition polymers or chain-growth polymers.
All of these are synthetic polymers. 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. It is very temperature resistant and so used in making cases for radios, telephones and clocks and also billiard balls.
The most common grades of industrial phenolics are Canvas, Linen and Paper.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.
It is the long chains that give polymers their unique properties. Consider ethane, CH 3 -CH 3, which is a gas molecule at room temperature. Because of their small size, ethane molecules are very mobile and can run almost anywhere they want without interacting with other molecules.
Polymers formed by a straightforward linking together of monomer units, with no loss or gain of material, are called addition polymers or chain-growth polymers.
A listing of some important addition polymers and their monomer precursors is presented in the following table. The applications take advantage of the various properties of these polymers to impart unique benefits to their formulations. The range of properties is as varied as the class of polymers that have been utilized.
Let’s take a closer look at the polymers used in cosmetics nowadays. Great informations on Polymers and Cosmetics. Really. 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. An Early Synthetic Polymers in History and the Use of Different Matherials.
words. 1 page. The History, Features, and Importance of Polymers An Introduction to the Analysis of DNA. words. 2 pages. A Look at the Three Types of Early Synthetic Polymers. words. 1 page. An Overview of Polymers, Their Sources and Uses.