POLYMERS DEFINITION PDF DOWNLOAD!
Polymers are materials made of long, repeating chains of molecules. The materials have unique properties, depending on the type of. polymer definition: 1. a chemical substance consisting of large molecules made from many smaller and simpler molecules: 2. a natural or artificial substance. Jump to Common examples - A polymer (/ˈpɒlɪmər/; Greek poly-, "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits. Polymers, both natural and synthetic, are created via polymerization of many small molecules, known as monomers.Polymerization · Polymers · Electroactive polymers · Ferroelectric polymers.
|Published:||17 October 2016|
|PDF File Size:||10.22 Mb|
|ePub File Size:||22.34 Mb|
The Basics: Polymer Definition and Properties
Plastic bottles, films, cups, and fibers are thermoplastic plastics. Polymers abound in nature. Spider polymers definition, hair, and horn are protein polymers. Starch can be a polymer as is cellulose in wood.
Rubber tree latex and cellulose have been used as raw material to make manufactured polymeric rubber and plastics. The first synthetic manufactured plastic was Bakelite, created in polymers definition telephone casing and electrical components. The first manufactured polymeric fiber was Rayon, from cellulose, in Nylon was invented in while pursuing a synthetic spider silk.
The Structure of Polymers Many common classes of polymers are composed polymers definition hydrocarbons, compounds of carbon and hydrogen.
These polymers are specifically made of carbon atoms bonded together, one to the next, into long chains that are called the backbone of the polymer. Because of the nature of carbon, one or more other atoms can be attached to each carbon atom polymers definition the backbone.
There are polymers that contain only carbon and hydrogen atoms. Polyethylene, polypropylene, polybutylene, polystyrene and polymethylpentene are examples of these.
What Is a Polymer?
Polyvinyl chloride PVC has chlorine attached to the all-carbon backbone. The distinct piece of each monomer that is incorporated into the polymer is known as a repeat unit polymers definition monomer residue.
Laboratory synthetic methods are generally divided into two categories, step-growth polymerization and chain-growth polymerization. However, some newer methods such as plasma polymerization do not fit neatly into either polymers definition.
Synthetic polymerization reactions may be carried out with or without a catalyst. Laboratory synthesis of biopolymers, especially of proteinsis an area polymers definition intensive research.
Biopolymer Microstructure of part of a DNA double helix biopolymer There are three main classes of biopolymers: In living cells, they may be synthesized by enzyme-mediated processes, such as the formation of DNA catalyzed by Polymers definition polymerase.
Polymer | Description, Examples, & Types |
The synthesis of proteins involves multiple enzyme-mediated processes to transcribe genetic information from the DNA polymers definition RNA and subsequently translate that information to synthesize the specified protein from amino acids. The protein may be modified further following translation in order to provide appropriate structure and functioning.
- What Is a Polymer?
- Polymer | Define Polymer at
- ADDITIONAL MEDIA
There are other biopolymers such polymers definition rubbersuberinmelanin and lignin. Modification of natural polymers[ edit ] Naturally occurring polymers such as cotton, starch and rubber were familiar materials for years before synthetic polymers such as polyethene and perspex appeared on the market.
Polymer - definition and classification of polymers.
Polymerization reactions tend to be dehydrations. A molecule of water is lost in the… The word polymer designates an unspecified number of monomer units. When the number of monomers is very large, the compound is sometimes called a polymers definition polymer.
Polymers are not restricted to monomers polymers definition the same chemical composition or molecular weight and structure.