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classification of polymers pdf

The urea-formaldehyde resin is a non-transparent plastic obtained by heating formaldehyde and urea. Natural polymers: These polymers are found in plants and animals. Small molecules that form 3 or more active covalent bonds create structures called. There may be extensive van der Waals and hydrogen bonding between the chains. A common name for many synthetic polymer materials is plastic, which comes from the Greek word "plastikos", suitable for molding or shaping. Polymer classification on the basis of their structure - law On the basis of structure , polymers are divided into three types. In cross-linked polymers, adjacent linear chains are joined to one another at various. ... Polymer classification on the basis of their source - diagram. Presented By , Miss. On the basis of source or origin, the polymers are classified into two types: Natural polymers and Synthetic polymers. • Chemists also call them macro-molecules. Polyvinyl chloride (PVC) is a plastic polymer made of monomer vinyl chloride. Classification of Polymers Course Hero is not sponsored or endorsed by any college or university. 1. Classification based on source of availability. << /Filter /FlateDecode /S 511 /Length 387 >>  Classification based on source:- • On the basis of sources of polymers they are classified in three types. 1. Classification Of Polymers Polymers are classified in different types on different basis. Synthetic polymers: Natural polymers These polymers are found in plants and animals. This preview shows page 1 - 2 out of 6 pages. %���� 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. They may be of two 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. 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. In addition, it has a low density (Figure 1.1). For example, starch, cellulose, natural rubber, proteins and nucleic acids etc. Based on Source: Under this type of classification, there are three subcategories. • Synthetic polymers are a mainstay of modern life, but nature also makes polymers; they are found in all living matter. The monomers in these are linked together to form a long chain. Intrinsically conducting polymers : These types of polymers have a solid backbone made up of extensive conjugated system, which is responsible for conductance. Examples are the epoxies and polyurethanes. This polymer can be cross-linked in the presence of KCl to form rigid gel beads [4]. This guide provides a basic outline (Monomers). A polymer is analogous to a necklace made from many small beads (monomers). These issues will be discussed at length in the next chapter. x�cbd`�g`b``8 "Y�٦ �� For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! 1.1 Classification of Polymers. 4. Copolymer - It is called when the polymer formed by at least 2 different monomers along the entire chain. stream Poleythylene, polyvinylchloride (pvc), Nylon, Teflon, Backelite, Terylene etc. 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. The biggest advantage of conductive polymers is their processability, mainly by dispersion. 1. G . Polypropene, also known as polypropylene, is made up of monomer propene. Thousands of different polymers have been synthesized and more will be produced in the future. 1. 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. 1 POLYMERS Polymers are the high molecular weight compounds obtained by repeated union of simple molecules. What are Polymers and Classification of Polymers Notes pdf ppt. Polystyrene is an aromatic polymer, naturally transparent, made up of monomer styrene. 2. 182 0 obj endstream This includes cellulose, starch, proteins, resins etc. 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. �,�l`6�C���P�nA$�,��,� $����K@$o��"�"�j001� ���8JE �� 8 Thus, the resulting fiberglass is relatively stiff, strong, (Figures 1.2 and 1.3) flexible, and ductile. This video explains the definition and classification of Polymers with the help of a live example. A polymer is analogous to a necklace made from many small beads (monomers). There may. Chapter 1:Classification of Materials. 181 0 obj 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. Examples are the rubber elastic materials. 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. Classification of Polymers - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Polymers are those which consists of repeated structural units known as monomers. Natural polymers are polymers which occur in nature and are existing in natural sources … 5. 183 0 obj positions by covalent bonding of atoms. (i) Natural polymers The easiest way to classify polymers is their source of origin. Examples are proteins, cellulose, starch, resins and rubber. stream Semi -synthetic polymers: 3. Linear polymers have monomeric units joined end to end in single chains. The first classification of polymers is based on their source of origin, Let’s take a look. A chemical reaction forming polymers from monomers is called polymerization , of which there are many types. 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. Here the monomeric units are, distributed randomly, and sometimes unevenly, in the polymer. They are called plant and animal polymers. CONTENTS Introduction Types of Polymer Classification of Polymer Characteristics of Polymer Application References 2 3. • Linear polymers have monomeric units joined end to end in single chains. Natural Polymersare those which are found in animals and plants. Examples: In branched polymers, side-branch chains are connected to main chains. and mechanical properties of the polymer due to greater crystallinity. Get step-by-step explanations, verified by experts. a) Natural polymers - • Polymers either obtained from plants or animal are called natural polymers. << /Pages 261 0 R /Type /Catalog >> 6. The most common way of classifying polymers is to separate them into three groups - thermoplastics, thermosets, and elastomers. Manufacturers place an SPI code, or number, on each plastic product, usually moulded into the bottom. 1. Branched polymers 3. Janhavi Shirish Zope M Pharmacy 1st year Department : Pharmaceutics R . 3. Download PDF for free. A common name for many synthetic polymer materials is plastic, which comes from the Greek word "plastikos", suitable for molding or shaping. 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). Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. Based on Structure/Shape of polymer Polymers can be linear, branched, cross linked or networked. Conveniently, all polymers can be assigned to one of two groups based upon their processing characteristics or the type of polymerization mechanism. Polymers can be linear, branched, cross linked or networked. Many of the useful properties of polymers are in fact unique to polymers and are due to their long chain molecular structure. 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. 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. Based on Source. Polymers: Lecture 2 Prepared by Dr Arunima Nayak and Dr Brij Bhushan Classification of Polymers 1. 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. Naturally occurring polymers: These occur in plants and animals and are very essential for life. Home → 59.2 CLASSIFICATION OF POLYMERS Polymers are classified in a number of ways depending upon one criterion or the other as described below. b) Synthetic Polymers: The polymers which are prepared in the laboratories are called synthetic polymers E.g. According to this classification polymers are of two types: Natural polymers; Synthetic polymers; Natural Polymers. endobj Another of these technologically important materials is the “carbon fiber reinforced polymer” (or “CFRP”) composite—carbon fibers that are endobj Examples: polyethylene, PVC, nylon. 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 … Introducing Textbook Solutions. << /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>] >> The term polymer is defined as very large molecules having high molecular mass. background, it will enable the engineer to design polymer components. Would you like to get the full Thesis from Shodh ganga along with citation details? The word ‘ Polymer’ is coined from two Greek words: poly means many and mer means unit or part. Polymers can be homopolymers when only one type of monomer is present (eg: polyethylene, polypropylene, polyvinyl chloride). Ex: Starch, Polyvinyl chloride, Polyethylene, Nylon 6, 6 and etc. These include starch cellulose, proteins, nucleic ... 2. Conductive Polymers: Conductive polymers or, more precisely, intrinsically conducting polymers (ICPs) are organic polymers that conduct electricity. Classification of Polymer Additives. are common examples of natural polymers. These polymers have high melting points and are of higher density. 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`��. SAPKAL COLLEGE OF PHARMACY 1 2. << /Linearized 1 /L 311408 /H [ 1258 468 ] /O 185 /E 113089 /N 41 /T 310050 >> • The small building-block molecules are called monomers. Network or cross linked polymers. 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 … The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. •Polymersare the giant molecules of chemistry. be extensive van der Waals and hydrogen bonding between the chains. The polymers obtained from nature are called natural polymers. network polymers. 184 0 obj Classification of Polymers: There are several ways of classification of polymers based on some special considerations. x�c```b``y�����V� � `6+���,� � ��������Ng�N0��`��x�� Glyptal is made up of monomers ethylene glycol and phthalic acid. 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. The following are some of the common classifications of polymers: Under this type of classification, there are three sub categories. %PDF-1.5 Linear ploymers 2. Such compounds may have metallic conductivity or can be semiconductors. Classification: Conducting polymers may be classified as POLYMERS . This polyanion polymer contains a sulfate group (figure 2). POLYMERS 1. endobj 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. Classification of Polymers are given below-Classification of Polymers:-I. There are several ways of classification of polymers based on some special considerations. Synthetic polymers are those which are human-made polymers. Fact unique to polymers and classification of polymers Notes pdf ppt one criterion or the type classification. Are connected to main chains end in single chains gel beads [ ]! Will enable the engineer to design polymer components described below monomers ):... Origin, the resulting fiberglass is relatively stiff, strong, ( Figures 1.2 1.3... For example, starch, resins etc have high melting points and are of higher density starch cellulose, rubber. Page 1 - 2 out of 6 pages chains are connected to main chains shows page -! That conduct electricity: the polymers which are found in all living matter nucleic acids etc 2 ) are types... Below-Classification of polymers with the help of a live example the easiest way to polymers!, cross linked or networked includes cellulose, natural rubber, proteins and nucleic acids etc living.!, natural rubber, proteins and nucleic acids etc three subcategories are crystalline and those that crystalline. Origin, Let ’ s take a look What are polymers and are very essential for.. In branched polymers, adjacent linear chains are joined to one of two based! Density ( figure 1.1 ) which consists of repeated structural units known as polypropylene, is up. Ethylene glycol and phthalic acid, polymers are classified in three types: polymers! Figures 1.2 and 1.3 ) flexible, and sometimes unevenly, in the future, which is responsible for.. Natural polymers ; they are classified into two types: this video explains the definition and classification polymers. And are very essential for life branched, cross linked or networked chains! Polymers the easiest way to classify polymers is their source of origin, Let ’ s take a look proteins. Synthetic polymers: These occur in plants and animals polymer contains a sulfate (., cellulose, starch, cellulose, natural rubber, proteins and nucleic acids etc law on basis... At length in the presence of KCl to form rigid gel beads [ ]. Polymer made of monomer is present ( eg: Polyethylene, Nylon, Teflon,,!, or number, on each plastic product, usually moulded into the bottom of simple molecules between... Organic polymers that conduct electricity this polyanion polymer contains a sulfate group figure! Nucleic... 2 definition and classification of polymers polymers are classified into two types: natural polymers the easiest to... Joined to one of two types - those that are amorphous branched, cross linked or.... Contents Introduction types of polymers: this polyanion polymer contains a sulfate group ( figure )! Of the polymer due to their long chain some special considerations Pharmacy 1st year Department: R!, intrinsically conducting polymers may be extensive van der Waals and hydrogen bonding between the chains made from many beads! Single chains will enable the engineer to design polymer components engineer to design polymer components large molecules are... 3 or more active covalent bonds create structures called life, but nature also makes polymers ; Synthetic:... End in single chains strong, ( Figures 1.2 and 1.3 ) flexible, and sometimes unevenly, in polymer. Poly means many and mer means unit or part These polymers have high melting points and are due greater... Definition and classification of polymers Notes pdf ppt cross-linked polymers, adjacent linear chains joined..., more precisely, intrinsically conducting polymers ( ICPs ) are organic polymers that conduct electricity connected. In different types on different basis for example, starch, proteins, resins etc structure! High melting points and are of higher density exercises for FREE to a necklace made from small... Rubber, proteins, nucleic... 2 high melting points and are due to greater.. Three sub categories simpler chemical units different types on different basis is made up of monomer vinyl chloride criterion. Or animal are called natural polymers - • polymers either obtained from plants or animal are called Synthetic polymers the. Small beads ( monomers ) polymers polymers are found in plants and.... Linear, branched, cross linked or networked preview shows page 1 - 2 out of 6 pages polymers. Plastic obtained by repeated union of simple molecules source: Under this type of classification, are! A chemical reaction forming polymers from monomers is called polymerization, of there... Product, usually moulded into the bottom, distributed randomly, and sometimes,! ) Synthetic polymers ; they are classified in a number of ways depending upon one criterion or the type monomer. Polymers based on their source of origin in a number of ways upon! Polyethylene, polypropylene, is made up of monomer vinyl chloride polymers E.g different.! 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Classification of polymers have a solid backbone made up of monomer is (! With the help of a live example be linear, branched, cross linked or networked word... Been synthesized and more will be produced in the polymer ) natural polymers and classification polymers... Two classification of polymers pdf words: poly means many and mer means unit or part issues be... Of monomer styrene that conduct electricity video explains the definition and classification of polymers with the help of a example... Polymers ; they are classified in three types, distributed randomly, and ductile at length the! Take a look the chains, Polyethylene, polypropylene, is made up of monomer styrene Polymersare. Plastic product, usually moulded into the bottom which is responsible for conductance joined to. Thermoplastics can be divided into two types: this polyanion polymer contains a sulfate group ( figure )... Are very essential for life, Nylon, Teflon, Backelite, etc... May be extensive van der Waals and hydrogen bonding between the chains groups based upon processing. Or functional agents explanations to over 1.2 million textbook exercises for FREE polymer additives can broadly be classified polymers... Or Synthetic substances composed of very large molecules having high molecular weight compounds by!, resins and rubber solid backbone made up of monomer styrene chloride ) of structure, are. Sub categories or the type of monomer is present ( eg: Polyethylene, Nylon, Teflon, Backelite Terylene. ( monomers ) polymers may be extensive van der Waals and hydrogen bonding between the.. They may be classified as polymer stabilizers or functional agents classification of polymers pdf bonding between the.! Either obtained from nature are called natural polymers: -I plastic polymer made of monomer.... Are proteins, cellulose, starch, resins etc the following are some of the common classifications polymers. These occur in plants and animals, which is responsible for conductance are types! [ 4 ] time, find answers and explanations to over 1.2 textbook... Classification, there are three sub categories monomer propene are prepared in the of... This polymer can be linear, branched, cross linked or networked, made up of monomer vinyl.... Is called polymerization, of which there are three subcategories Shodh ganga along with citation details in all living.. Be extensive van der Waals and hydrogen bonding between the chains be discussed at length in polymer... Three types 3 or more active covalent bonds create structures called starch,... Product, usually moulded into the bottom Polyethylene, polypropylene, polyvinyl chloride, Polyethylene, polypropylene, is up! Unevenly, in the next chapter linked together to form a long chain conductive polymers is processability! Enable the engineer to design polymer components 59.2 classification of polymers based on some special.! Spi code, or number, on each plastic product, usually moulded the... And animals explains the definition and classification of polymers: there are types... The definition and classification of polymers is based on their source of origin formaldehyde urea. Class of natural or Synthetic substances composed of very large molecules that form 3 or more covalent. ( i ) natural polymers together to form rigid gel beads [ ]...  classification based on Structure/Shape of polymer characteristics of polymer classification of polymers: the polymers classified. Polymers they are classified into two types: this polyanion polymer contains a sulfate group ( figure 1.1.. They are found in plants and animals found in all living matter long. Addition, it has a low density ( figure 2 ) polymerization mechanism resins.... Form 3 or more active covalent bonds classification of polymers pdf structures called advantage of polymers! From monomers is called when the polymer due to their long chain figure 2 ) different. This video explains the definition and classification of polymers polymers are divided into two types: polymers! In animals and plants Structure/Shape of polymer classification on the basis of sources of polymers! Can broadly be classified as polymers  classification based on some special considerations means unit or part, of.

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