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On the basis of mode of polymerisation, polymers are classified into the following groups: Addition polymers or chain growth polymers: 1)A polymer formed by direct addition of repeated monomers without the elimination of byproduct molecules is called addition polymer.
On what basis are polymers classified?
Polymers can be divided into two types: natural polymers and synthetic polymers. Examples of natural polymers: DNA, proteins, cellulose, starch and natural rubber.
What is polymerization process classify the process?
A polymer is that chemical molecule which has a long set of identical building blocks, all linked with a bond, be it ionic or covalent. The process in which monomers are all linked together to form the long-chain polymers is called a polymerization reaction or polymerization process.
What are the 2 types of polymer?
Polymers fall into two categories: thermosetting plastic or thermoset. thermoforming plastic or thermoplastic.
What are 4 types of polymers?
Terms. Synthetic polymers are human-made polymers. From the utility point of view, they can be classified into four main categories: thermoplastics, thermosets, elastomers, and synthetic fibers.
What is polymerization process give example?
Polymerization reactions are chain reactions, and the formation of Teflon from tetrafluoroethylene is one example. In this reaction, a peroxide (a compound in which two oxygen atoms are joined together by a single covalent bond) may be used as the initiator.
What is polymerization give an example?
A polymer is a large single chain-like molecule in which the repeating units derived from small molecules called monomers are bound together. The process by which monomers are transformed into a polymer is called polymerisation. For example ethylene polymerizes to form polyethylene.
What is polymerization and its type?
The polymerisation is defined as the chemical process in which the monomers are joined together to form polymers. There are two types of polymerisation: (a) Addition polymerisation: When the monomers are added together with the help of a catalyst it is known as addition polymerisation.
What are the 3 types of polymers?
There are 3 principal classes of polymers – thermoplastics, thermosets, and elastomers. Differentiation between these classes is best defined by their behaviour under applied heat. Thermoplastic polymers can be either amorphous or crystalline. They behave in a relatively ductile manner but often have low strength.
What is the revised classification of polymers?
The most common way of classifying polymers is to separate them into three groups – thermoplastics, thermosets, and elastomers. The thermoplastics can be divided into two types – those that are crystalline and those that are amorphous.
What is difference between plastic and polymer?
The key difference between polymers and plastics is that plastic is a specific type of polymer. Plastics are comprised of a long chain of polymers, where polymers are composed of smaller, uniform molecules. Polymers are basically enormous molecules made with a massive amount of smaller, identical molecules.
What is the function of polymer?
Organic polymers play a crucial role in living things, providing basic structural materials and participating in vital life processes. For example, the solid parts of all plants are made up of polymers. These include cellulose, lignin, and various resins.
Is Silk a synthetic polymer?
There are two types of polymers: synthetic and natural. Synthetic polymers are derived from petroleum oil, and made by scientists and engineers. Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.
What are the uses of polymer?
Uses of polymers Polymer Properties Uses Poly(chloroethene) ‘PVC’ Tough, electrical insulator, can be made hard or flexible Insulation for electrical wires, windows, gutters, pipes Poly(tetrafluoroethene) ‘PFTE’ Slippery, chemically unreactive Non-stick coatings for pans, containers for laboratory substances.
What is polymerization explain?
Polymerization, any process in which relatively small molecules, called monomers, combine chemically to produce a very large chainlike or network molecule, called a polymer. The monomer molecules may be all alike, or they may represent two, three, or more different compounds.
What is polymerization class 10th?
A process of making the monomer molecules react together in a chemical reaction and produce three-dimensional networks or polymer chains is called polymerization.
What is the main difference between the two types of polymerization?
Difference Between Addition And Condensation Polymerization Addition Polymerization Condensation Polymerization Produces no by-products By-products such as ammonia, water and HCl are produced Addition of monomers results in polymers Condensation of monomers result in polymers.
What is another name for polymer?
In this page you can discover 16 synonyms, antonyms, idiomatic expressions, and related words for polymer, like: nanocomposites, thermoplastic, semiconductor, coating, , polymeric, polymers, elastomer, , nanoparticles and nanostructures.
How many types of polymers are classified?
There are three types of classification under this category, namely, Natural, Synthetic, and Semi-synthetic Polymers.
Is DNA a polymer?
And even our DNA is a polymer—it’s made of monomers called nucleotides. The first man-made polymers were actually modified versions of these natural polymers.
Is glass An example of polymers?
Most glass is made from sand, and when we melt down the sand, we usually add some sodium carbonate. This gives us a tougher glass with a structure that looks like this: These linear, and yes, inorganic materials have a structure very similar to glass, and they’re considered polymers.
Is cotton a synthetic polymer?
Cotton fibre is made of a natural polymer called cellulose. Cellulose is a polymer which is made up of a large number of small glucose molecules joined one after the other.
What are two major categories of polymers classified as plastics?
As mentioned above, polymers that are classified as plastics can be divided into two major categories: thermoplastics and thermosets. Thermoplastics such as polyethylene and polystyrene are capable of being molded and remolded repeatedly.
What is the structure of polymers?
A polymer is composed of many simple molecules that are repeating structural units called monomers. A single polymer molecule may consist of hundreds to a million monomers and may have a linear, branched, or network structure.
Does polymer mean plastic?
Plastics are a group of materials, either synthetic or naturally occurring, that may be shaped when soft and then hardened to retain the given shape. Plastics are polymers. The word polymer comes from two Greek words: poly, meaning many, and meros, meaning parts or units.
Is cotton a polymer?
Cotton is a polymer which is made up of cellulose. Cellulose is a carbohydrate which is also a polymer of repeated chains of glucose.
What makes a polymer A plastic?
Polymers can exist organically or be created synthetically, and consist of chains of joined individual molecules or monomers. Plastics are a type of polymer composed of chains of polymers which can be partially organic or fully synthetic. Simply put, all plastics are polymers, but not all polymers are plastics.
What are the advantages of polymer?
Polymers are more resistant to chemicals than their metal counterparts. Polymer parts do not require post-treatment finishing efforts, unlike metal. Polymer and composite materials are up to ten times lighter than typical metals.
What is a polymer melt?
Polymer melts are solvent-free, viscoelastic liquids consisting of entangled macromolecules with a monomer volume fraction ηm=πρmb3/6 comparable with that of simple liquids.
What is polymer short answer?
Polymers are materials made of long, repeating chains of molecules. The materials have unique properties, depending on the type of molecules being bonded and how they are bonded. Some polymers bend and stretch, like rubber and polyester. The term polymer is often used to describe plastics, which are synthetic polymers.
