Polymers are a huge chain of molecules. The simple compounds from which polymers are made, are called monomers. Branched Polymers - Linear polymer with branches with same structure/polymer as the main chain (1 kind of polymer) Crosslinked/network Polymers - Chemical linkage exist between polymer chain . A few other polymers that are traditionally recognized as belonging to the addition class are polymerized not by addition to an ethylene double bond but through a ring-opening polymerization of a sterically strained cyclic monomer. The small molecules that are used in synthesizing a polymer are called monomers. The simple molecules from which polymers are derived are called monomers. Two very common techniques for measuring the molecular mass of polymers are high-pressure liquid chromatography (HPLC), also known as size exclusion chromatography (SEC), and gel permeation chromatography (GPC). The Polymers prepared in laboratory are called synthetic Polymers. Each monomer that is added to form polymers is called repeat units. These may be represented as : -[A-A-A-A-A-A]- Homopolymers are commonly named by placing the prefix poly in front of the constituent monomer name. Nonetheless, manufacturers and importers of polymers may still be required to register the monomers or other substances used as building blocks of the polymer, as these molecules are generally recognised as of higher concern than the polymer molecule itself. The major differences to note between the two acidic monomers with regard to polymerization reactions and polymer properties are the higher These Polymers are also called man made Polymers. E.g. Monomers are thus building blocks of polymers. 2. (iii) Cross-linked polymers or network polymers In such polymers, the monomer units are linked together to form three dimensional network. • Linear polymers have monomeric units joined end to end in single chains. Structure of polythene. Homopolymers: These consist of chains with identical bonding linkages to each monomer unit. Types of Polymer. Anything that is made up of same type of Chemical composition which is repeated numerous times can be considered as a polymer. Polyurethanes, polyacrylonitrile, PVC, epoxy and styrenic copolymers ranked as most … Homopolymer: A polymer resulting from the polymerization of a single monomer; a polymer consisting substantially of a single type of repeating unit . The polymers were ranked based on monomer hazard classifications, and initial assessments were made. Research highlights Environmental and health hazards of chemicals in polymer production were identified. B- Classification Based on the structure of polymers : There are three different types based on the structure of the polymers. Copolymer - It is called when the polymer formed by at least 2 different monomers along the entire chain. Examples: polyethylene, PVC, nylon. The … For example Polymers example Polythene Polyvinyl chloride (PVC) Nylon Teflon Bakelite Terylene Cellulose diacetate Vulcanised rubber Starch Melamine formaldehyde resin Polymers Uses Coatings Adhesives Laminates Electrolytes Plastic pipes Films Questions on polymers What are polymers? polymer,classification of polymers,polymerization,copolymer,polythene.PVC,polystyrene,polyester,polycarbonates,polyamides,nylon6.6,addition ,isotactic This is one of the best Blogs for free tutorials about various parts of chemistry, such as element chemistry, organic chemistry, inorganic chemistry, physical chemistry, analytical chemistry, … Study Materials Classification of Polymers: Source, Structure, Polymerisation, Examples Types of Polymerization: Condensation vs. Polymers can also be classified based on the type of monomers present in them. INTRODUCTION | 1.1 Classification of Polymers. E.g. The reactivity ratio of a growing copolymer chain terminating in a given monomer is the ratio of the reaction rate constant for addition of the same monomer and the rate constant for addition of the other monomer. All have a … Agitation can speed up this process. Classification of Polymers Polymers are classified into different types on the basis of monomers, source of availability, structure,mode of synthesis. Depending on the repetition or variety of monomers, polymers are classified as: Homopolymer - It is called when the polymer formed by the same monomer throughout its chain. Different types of polymers: 1) homopolymer 2) alternating copolymer 3) random copolymer 4) block copolymer 5) graft copolymer. Classification of polymers Based on the Structure . Polymers: Lecture 2 Prepared by Dr Arunima Nayak and Dr Brij Bhushan Classification of Polymers 1. These belong to the polymer families of polyurethanes, polyacrylonitriles, polyvinyl chloride, epoxy resins, and styrenic copolymers. The word POLYMER comes from the Greek words poly means many and mer means parts . Some examples of the synthetic polymers are polyethylene, polystyrene, PTFE synthetic rubber, nylon, PVC, bakelite, teflon, orion, etc. cellulose, jute, linen, silk, wool etc. These are expected to be quite hard, rigid and brittle. 2) The gel gradually disintegrates into true solution. 27/05/2008 : Version 2.0 . Solubility Parameter A polymer is soluble when the Gibbs free energy of mixing i.e ΔG = ΔH - TΔS is negative. Fig.4. ADHESIVES | 2] Classification Based on Structure of Polymers Classification of polymers based on their structure can be of three types: (i) Linear polymers: These polymers are similar in structure to a long straight chain which identical links connected to each other. This classification includes the following categories; 1. Polymers are a huge chain of molecules. CONTENTS Introduction Types of Polymer Classification of Polymer Characteristics of Polymer Application References 2 3. Classification Based on Composition of Polymers:  Homopolymer: A polymer resulting from the polymerization of a single monomer; a polymer consisting substantially of a single type of repeating unit. A polymer is a high molecular mass compound ranging from 5000 to one million and they are formed by the combination of a large number of one or more low molecular weight compounds. Based on Structure/Shape of polymer Polymers can be linear, branched, cross linked or networked. Polyvinyl chloride (PVC) contains monomer. The formation of the polymer chains are produced by different polyreactions that can occur between monomers. 1.2 Polymer Structure. 6. The cross-linking restricts the motion of the chains and leads to a rigid material. The polymer chains still have some freedom to move, but are prevented from permanently moving relative to each other by the cross-links. Organic polymers can be also divided into natural polymers such as proteins and synthetic polymers as thermosets materials. Polyethylene Classification of Polymers 1. Polymers; Polymer chemistry; monomers; polymerisation; example;uses; questions; revision. Copolymer: On the other hand, a copolymer is made up of two or more types of re… The following are some of the common classifications of polymers: Under this type of classification, there are three sub categories. The process of converting monomers to polymer is called polymerization. Rubber bands and other elastics are made of elastomers. Polymers obtained during addition reaction are called addition Polymers. Classification: Classification Based on Source:  Natural Polymers: These polymers are found in plants and animals. For example; Bakelite, melamine formaldehyde resin. Classification on the bases of source: Natural polymers: These polymers are obtained either from plants or animal and are named as plant polymer e.g. The transformation of ethene to polythene and interaction of hexamethylene diamine and adipic acid leading to the formation of Nylon- 6, 6 are examples of two different types of polymerisation reactions. Polymer chemistry It is a branch of chemistry in which we study about polymers. Classification of polymers: Classification based on source of availability: 1. Based on their structure, the polymers can be classified into three types such as linear polymers, branched-chain polymers, and network, or cross linked polymers. Starch is a polymer of glucose, cellulose is also a polymer of glucose, proteins are polymers of amino acids. Depending on the repetition or variety of monomers, polymers are classified as: Homopolymer - It is called when the polymer formed by the same monomer throughout its chain. Among the other properties that can be modified based on these factors include solubility in and other solvents, melting point, flammability, color, hardness, transparency, film thickness, wetability, surface friction, moldability, and particle size—the list goes on. All about Polymers and polymer chemistry for undergraduate students. Thermosets are strong and durable. Synthetic polymers: A variety of synthetic polymers as plastic (polythene), synthetic fibres (nylon 6,6) and synthetic rubbers (Buna – S) are examples of manmade polymers extensively used in daily life as well as in industry. Types of mer Involved. 2] Classification Based on Structure of Polymers Classification of polymers based on their structure can be of three types: (i) Linear polymers: These polymers are similar in structure to a long straight chain which identical links connected to each other.The monomers in these are linked together to form a long chain. Classification of Polymers Based on Mode of Polymerisation The polymers are also classified based on: … 1. A simulated skeletal structure of a network polymer with a high cross-link density is shown below. Polymers are classified into three types on the basis of Structure. The synthetic polymers can be further classified as these made up of monomers and comonomer units. Homopolymer: A homopolymer is made up of only one type of monomer. On the basis of monomers On the basis of the monomers polymers are classified into two types namely An elastomer must be above its glass transition temperature, \(T_g\), and have a low degree of crystallinity. Working-up, general processes of compounding and after-treatment are covered by subclass C08J. Introduction to Polymer Fibres. Classification of Polymers. The functionality of monomers depends upon the number of bonding sites in monomer. Polymers can also be classified based on the type of monomers present in them. Glyptal is made up of monomers ethylene glycol and phthalic acid. Monomers that participate in condensation polymerization have a different stoichiometry than monomers that participate in addition polymerization: This nylon is formed by condensation polymerization of two monomers, yielding water. There may be extensive van der Waals and hydrogen bonding between the chains. Classification. When monomers react in a manner that branches are formed in the chains of the polymers, then those polymers are known as branched polymers. A copolymer is a polymer derived from more than one species of monomer. 2 mins read. 1. The monomers in these are linked together to form a long chain. The monomer … These monomers are generally very reactive molecules. The polymers were ranked based on monomer hazard classifications, and initial assessments were made. Polyvinyl chloride 2. Polyvinyl chloride (PVC) is a plastic polymer made of monomer vinyl chloride. Alkenes, vinyl chloride, adipic acid, glycol with two bonding sites act as monomers. A hazard ranking model for environmental and human health hazard classifications was developed. INTRODUCTION Polymers are very large molecules made when hundreds of monomers join together to form long chains . Linear Polymers - A long chain of skeletal atoms to which are attached the substituent group. Polyethylene, PVC, Polypropylene, Nylon 6 Co Polymers A polymer consist of monomers of different chemical structure are called copolymers. Classification of Polymer based on Structure. Monomers react with each other in end to end fashion such that they form linear or straight chains of polymers. Based on Structure/Shape of polymer Polymers can be linear, branched, cross linked or networked. These techniques are based on forcing a polymer solution through a matrix of cross-linked polymer particles at high pressure of up to several hundred bars. 2. Based on Number of Monomers: Polymers can be homopolymer or copolymer when the number of monomers are one and two respectively. The close packing results in high densities, tensile strength and high melting and boiling points. Polyethene, PVC, Nylons, polyesters etc. For example; Cellulose diacetate, Vulcanised rubber. All have a large global … Can have more than one type of repeat unit. Polystyrene 3. Artificial polymers: They are artificially made in industries for various commercial uses. Classification of Polymers Based on Structure (i) Linear polymers These are the polymers in which the monomer units are linked to one another to form long linear chains. When the monomers react to form a network, a 3-D structure, then those polymers are known as Network polymers. Monomers are small and simple molecules depend and have a capacity of forming two chemical bonds with two other monomers. These are natural polymers with some modifications. 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