Examples are the epoxies and polyurethanes. Ex: Starch, Polyvinyl chloride, Polyethylene, Nylon 6, 6 and etc. Poleythylene, polyvinylchloride (pvc), Nylon, Teflon, Backelite, Terylene etc. The following are some of the common classifications of polymers: Under this type of classification, there are three sub categories. Small molecules that form 3 or more active covalent bonds create structures called. Conductive Polymers: Conductive polymers or, more precisely, intrinsically conducting polymers (ICPs) are organic polymers that conduct electricity. 183 0 obj This video explains the definition and classification of Polymers with the help of a live example. Based on Structure/Shape of polymer Polymers can be linear, branched, cross linked or networked. Polymers can be linear, branched, cross linked or networked. Copolymer - It is called when the polymer formed by at least 2 different monomers along the entire chain.  Classification based on source:- • On the basis of sources of polymers they are classified in three types. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! Polyvinyl chloride (PVC) is a plastic polymer made of monomer vinyl chloride. 5. Presented By , Miss. Based on Source. Classification of Polymer Additives. Synthetic polymers are those which are human-made polymers. 1. Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. ... Polymer classification on the basis of their source - diagram. POLYMERS 1. Natural Polymersare those which are found in animals and plants. These polymers have high melting points and are of higher density. Here the monomeric units are, distributed randomly, and sometimes unevenly, in the polymer. << /Linearized 1 /L 311408 /H [ 1258 468 ] /O 185 /E 113089 /N 41 /T 310050 >> Branched polymers 3. Examples are the rubber elastic materials. 1. Another of these technologically important materials is the “carbon fiber reinforced polymer” (or “CFRP”) composite—carbon fibers that are 4. 184 0 obj << /Filter /FlateDecode /S 511 /Length 387 >> 6. The polymers obtained from nature are called natural polymers. • Chemists also call them macro-molecules. 1.1 Classification of Polymers. Janhavi Shirish Zope M Pharmacy 1st year Department : Pharmaceutics R . Glyptal is made up of monomers ethylene glycol and phthalic acid. a) Natural polymers - • Polymers either obtained from plants or animal are called natural polymers. 1. The word ‘ Polymer’ is coined from two Greek words: poly means many and mer means unit or part. %���� The urea-formaldehyde resin is a non-transparent plastic obtained by heating formaldehyde and urea. 3. The number of monomeric units usually is large and variable, each sample of a given polymer being characteristically a mixture of molecules with different molecular weights. • Synthetic polymers are a mainstay of modern life, but nature also makes polymers; they are found in all living matter. The term polymer is defined as very large molecules having high molecular mass. endobj DIFFERENT TYPES OF PLASTICS AND THEIR CLASSIFICATION The Society of the Plastics Industry (SPI) established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic. Materials Science of Polymers for Engineers is based on the German textbook, Werk­ stoffkunde Kunststoffe (G. Menges, Hanser Publishers, 1989), and on lecture notes from polymer materials … Network or cross linked polymers. The biggest advantage of conductive polymers is their processability, mainly by dispersion. Cb����B�@$O�\��aƔ����_���0�f8ޠvt>���q=2 ��ٶ��4�%�b� �[�6��h>Ϫ5'V��꙽{���;�]븽{�E�U��O"ǝB�ٴ^���;,�t�:D��� ����ls�W�ʖ(��@D(���6�Q/�f��v�H����\��������hNZ~�xB���ZѪ�����RV��r �KY�K`��. b) Synthetic Polymers: The polymers which are prepared in the laboratories are called synthetic polymers E.g. Introducing Textbook Solutions. Intrinsically conducting polymers : These types of polymers have a solid backbone made up of extensive conjugated system, which is responsible for conductance. 5.33, Introduction to Polymer Chemistry Page 4 Classification of polymers: Polymers (synthetic) 1) Thermoplastics (plastics) — linear, some cross -linking can be melted and reformed on heating a) Amorphous — no ordered structure b) Semi -crystalline — compo sed of microscopic crystallites — domains of crystalline structure. 1 POLYMERS Polymers are the high molecular weight compounds obtained by repeated union of simple molecules. Classification: Conducting polymers may be classified as POLYMERS . • Linear polymers have monomeric units joined end to end in single chains. Conveniently, all polymers can be assigned to one of two groups based upon their processing characteristics or the type of polymerization mechanism. There may be extensive van der Waals and hydrogen bonding between the chains. Polymers can be homopolymers when only one type of monomer is present (eg: polyethylene, polypropylene, polyvinyl chloride). Manufacturers place an SPI code, or number, on each plastic product, usually moulded into the bottom. CONTENTS Introduction Types of Polymer Classification of Polymer Characteristics of Polymer Application References 2 3. Polymers-Lecture 2.pdf - Polymers Lecture 2 Unit-2a Classification of Polymers 1 Based on Structure\/Shape of polymer Polymers can be linear branched, Prepared by Dr Arunima Nayak and Dr Brij Bhushan. This polyanion polymer contains a sulfate group (figure 2). (Monomers). Download PDF for free. HDPE – high, density polyethylene is primarily a linear polymer with minor branching, while LDPE, linearity and chain length tend to increase the melting point and improve the physical. �,�l`6�C���P�nA$�,��,� $����K@$o��"�"�j001� ���8JE �� Classification of Polymers - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. and mechanical properties of the polymer due to greater crystallinity. be extensive van der Waals and hydrogen bonding between the chains. On the basis of source or origin, the polymers are classified into two types: Natural polymers and Synthetic polymers. This preview shows page 1 - 2 out of 6 pages. %PDF-1.5 • The small building-block molecules are called monomers. Natural polymers These polymers are found in plants and animals. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. 182 0 obj Polystyrene is an aromatic polymer, naturally transparent, made up of monomer styrene. Classification of Polymers: There are several ways of classification of polymers based on some special considerations. Polymers can be co-polymer when two or more types of monomeric units are present, – only one monomer (repeating unit): - A – A – A – A – A – A – A -, Also called random copolymers. This polymer can be cross-linked in the presence of KCl to form rigid gel beads [4]. What are Polymers and Classification of Polymers Notes pdf ppt. Linear polymers have monomeric units joined end to end in single chains. Chapter 1:Classification of Materials. 2. (i) Natural polymers The easiest way to classify polymers is their source of origin. Synthetic polymers: The first classification of polymers is based on their source of origin, Let’s take a look. network polymers. For example, starch, cellulose, natural rubber, proteins and nucleic acids etc. A common name for many synthetic polymer materials is plastic, which comes from the Greek word "plastikos", suitable for molding or shaping. This guide provides a basic outline Examples are proteins, cellulose, starch, resins and rubber. 1. Classification of Polymers 8 Thus, the resulting fiberglass is relatively stiff, strong, (Figures 1.2 and 1.3) flexible, and ductile. 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. Semi -synthetic polymers: 3. These issues will be discussed at length in the next chapter. Based on Source: Under this type of classification, there are three subcategories. In addition, it has a low density (Figure 1.1). Polyethylene is considered to be as one of the simplest polymer, it has ethene or ethylene as the monomer unit whereas the linear polymer is known as the high density polyethylene-HDPE. On the basis of origin of polymers, these are classified as (i) Natural Polymers These are found in plants and animals, e.g., cellulose, starch (polymer of glucose), protein (polymer of α-amino acids), rubber (polymer of isoprene, 2-methyl-1, 3-butadiene). A polymer is analogous to a necklace made from many small beads (monomers). Naturally occurring polymers: These occur in plants and animals and are very essential for life. stream Polymer stabilizers are essential to practical use, since they maintain the inherent properties, color, and other characteristics of plastics by preventing the oxidative degradation caused by high temperature during processing, and ultraviolet exposure during use. In cross-linked polymers, adjacent linear chains are joined to one another at various. •Polymersare the giant molecules of chemistry. Thousands of different polymers have been synthesized and more will be produced in the future. << /Pages 261 0 R /Type /Catalog >> endobj Linear ploymers 2. According to this classification polymers are of two types: Natural polymers; Synthetic polymers; Natural Polymers. Polypropene, also known as polypropylene, is made up of monomer propene. The most common way of classifying polymers is to separate them into three groups - thermoplastics, thermosets, and elastomers. endobj Polymer classification on the basis of their structure - law On the basis of structure , polymers are divided into three types. POLYMERS olymers are substances made up of recurring structural units, each of which can be regarded as derived from a specific compound called a moanomer. Such compounds may have metallic conductivity or can be semiconductors. Get step-by-step explanations, verified by experts. There may. Natural polymers: These polymers are found in plants and animals. 1. The monomers in these are linked together to form a long chain. Many of the useful properties of polymers are in fact unique to polymers and are due to their long chain molecular structure. stream G . In this chapter, focus will be on general characteristics, applications and an introduction to the mechanical behavior including elementary concepts of their inherent time dependent or viscoelastic nature. A common name for many synthetic polymer materials is plastic, which comes from the Greek word "plastikos", suitable for molding or shaping. Polymers: Lecture 2 Prepared by Dr Arunima Nayak and Dr Brij Bhushan Classification of Polymers 1. Natural polymers are polymers which occur in nature and are existing in natural sources … They may be of two types: Classification based on source of availability. are common examples of natural polymers. Classification Of Polymers Polymers are classified in different types on different basis. Classification of Polymers are given below-Classification of Polymers:-I. endstream 181 0 obj x�c```b``y�����V� � `6+���,� � ��������Ng�N0��`��x�� Would you like to get the full Thesis from Shodh ganga along with citation details? A polymer is analogous to a necklace made from many small beads (monomers). This includes cellulose, starch, proteins, resins etc. Home → 59.2 CLASSIFICATION OF POLYMERS Polymers are classified in a number of ways depending upon one criterion or the other as described below. Polymers are those which consists of repeated structural units known as monomers. 2) Based on the structure polymers are classified as (a) linear polymer (b) Branched chain polymer (c) crosslinked polymer a) Linear polymer : In linear polymer the monomeric units are linked together to form linear … Examples: polyethylene, PVC, nylon. These include starch cellulose, proteins, nucleic ... 2. A chemical reaction forming polymers from monomers is called polymerization, of which there are many types. Polymer additives can broadly be classified as polymer stabilizers or functional agents. They are called plant and animal polymers. There are several ways of classification of polymers based on some special considerations. A chemical reaction forming polymers from monomers is called polymerization , of which there are many types. Course Hero is not sponsored or endorsed by any college or university. background, it will enable the engineer to design polymer components. Polymers make up many of the materials in living organisms, and they constitute the basis of certain minerals and human-made materials, such as paper and plastics. x�cbd`�g`b``8 "Y�٦ �� << /Type /XRef /Length 94 /Filter /FlateDecode /DecodeParms << /Columns 5 /Predictor 12 >> /W [ 1 3 1 ] /Index [ 181 95 ] /Info 201 0 R /Root 183 0 R /Size 276 /Prev 310051 /ID [<567f1b62382ae6ca8887dca1d9640ed5><567f1b62382ae6ca8887dca1d9640ed5>] >> positions by covalent bonding of atoms. SAPKAL COLLEGE OF PHARMACY 1 2. 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. 1. Examples: In branched polymers, side-branch chains are connected to main chains. In plants and animals be of two groups based upon their processing characteristics the. Hydrogen bonding between the chains ( ICPs ) are organic polymers that conduct electricity to their long.. 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