classification of polymers ppt

Thermosetting materials start as liquids/syrups, often called "resins", as powders or partially cured products ("preforms") which need heat for the shaping phase. We highlighted that LCA ranking and Green Design rankings do not necessarily correlate exactly. For example, polyhydroxyalkanoate from corn grain (PHA-G) ranked very high in the Green Design ranking, but had […] The following are some of the common classifications of polymers: Under this type of classification, there are three sub categories. Classification and properties of biodegradable polymers •Silk is a polymer of the amino acids glycine and alanine •Wool is having disulphide (sulphur-sulphur) bonds to link the polymer chains together. Download now. Natural polymers These polymers are found in plants and animals. Sep 13, 2020 - Chapter 15 - Polymers - PPT, The Science and Engineering of Materials Notes | EduRev is made by best teachers of . Search Search. Natural polymers include such materials as silk, shellac, bitumen, rubber, and cellulose. The polymers are defined as macromolecules composed of one or more chemical units (monomers) that are repeated throughout a chain.. A polymer is like a thread joins many coins punched through the center, in the end we get a string of coins, the coins would be the monomers, and the chain with the coins would be the polymer. Classification of Polymers Polymers are classified based on the reaction by which they are formed. Classification of Polymers Based on Source of Origin (i) Natural polymers Those polymers which occur in nature. This video explains the definition and classification of Polymers with the help of a live example. Global and Chinese Medical Polymer Industry, 2016 Market Research Report - The 'Global and Chinese Medical Polymer Industry, 2011-2021 Market Research Report' is a professional and in-depth study on the current state of the global Medical Polymer industry with a focus on the Chinese market. Classification of Polymers. There are several ways of classification of polymers based on some special considerations. Jump to Page . The chemical structure, sources, production and synthesis methods, physical properties (mechanical, barrier and thermal properties) and applications of most important biodegradable polymers would be discussed. Isotactic and syndiotactic polymers are instances of the more general class of eutactic polymers, which also includes heterogeneous macromolecules in which the sequence consists of substituents of different kinds (for example, the side-chains in proteins and the bases in nucleic acids). Would you like to get the full Thesis from Shodh ganga along with citation details? 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. II.E Polymer-Polymer Interactions. The objective of this chapter is to classification of biodegradable polymers. Classification of Polymers based upon Sources : Depending on the source the polymers are classified into two classes : Natural Polymers. are the usual examples of this subcategory. i.e., in plants or animals. The Society of the Plastics Industry (SPI) established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic. Feb2018.ppt from METE 230 at Middle East Technical University - Merkez Campus. CHE407B (1).pdf. It could also refer to polymer networks that exhibit distinct topologies owing to special crosslinkers. Polymers are classified in a number of ways depending upon one criterion or the other as described below. Semi-synthetic polymers: Cellulose derivatives as cellulose acetate (rayon) and cellulose nitrate, etc. lesson 1 fibres: their classification and characteristics structure 1.0 objectives 1.1 introduction 1.2 classification of fibres 1.3 natural fibres 1.4 polymeric natural fibres 1.5 man-made fibres 1.6 natural fibres vs.man-made fibres 1.7 assignments 1.7.1 class assignments 1.7.2 home assignments 1.8 summing up 1.9 possible answers to self-check questions The Polymers: Classification The main classes of polymers are: • Natural polymers Example: cellulose and protein, which provide the mechanical basis for most plant and animal life • Thermoplastics, which soften on heating Example: polyethylene • Thermosets or Resins, which harden when two components are heated together Example: an epoxy This review article focuses on conducting polymers and their applications. 2 V.S.Saravana Mani, Head& Asso.Prof, Dept. Natural polymers: These polymers are found in plants and animals.Examples are proteins, cellulose, starch, resins and rubber. The sulphur is present due to the amino acid cysteine 3 OVERVIEW • Role of resins in FRP composites • Thermosets vs. thermoplastics – Advantage & limitations • Polymer chemistry – Chain & step polymerization • Catalysts, inhibitors, accelerators – Chain crosslinking/ curing – Typical thermoset resin systems • Polymer processing • Polymer physics – Glass transition – Stress-strain curve • Summary By way of example, consider a polymer such as polyethene which, in a normal commercial sample, will be made up of molecules having 1000 to 2000 CH, groups in continuous chains. However, the majority of polymers or plastics used for engineering design are synthetic and often they are specifically formulated or “designed” by chemists or chemical engineers to serve a specific purpose. What are polymers? Mats. Chapter 1:Classification of Materials. CLASSIFICATION OF SMART POLYMERS Smart polymers can be classified according to their physical features or to the stimuli they’re responding. On the basis of source or origin, the polymers are classified into two types: Natural polymers and Synthetic polymers. | PowerPoint PPT presentation | free to view 1. Polymer - definition and classification of polymers. Conducting polymers (CPs) are an exciting new class of electronic materials, which … Close suggestions. Types of Plastics: They are two types of Plastics: POLYMERS.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. As a result, they are thermoplastic materials, which flow easily when heated and can be molded into a variety of shapes. Hope you had got an idea of what plastic is? ENGINEERING MATERIALS METALS COMPOSITES CERAMICS POLYMERS Classification are called natural polymers. S. Khan1, Nawaf. These include starch cellulose proteins, nucleic acids and natural rubbers. Now, let’s discuss the Classification or Types of Plastics. Over the last few posts we have been talking about polymer sustainability, use of renewable sources for bio-polymers, Life Cycle Assessments, and Green Design. E.Ann MacGregor, in Encyclopedia of Physical Science and Technology (Third Edition), 2003. These are the 11 properties of polymers or plastics which are discussed in a detailed manner. N. Hamadneh2, Waqar A. Khan*1 1Department of Mechanical & Industrial Engineering, College of Engineering Majmaah University, P.O Box 66, Majmaah 11952, Kingdom of Saudi Arabia. POLYMERS.ppt. Polymer nanocomposites – synthesis techniques, classification and properties Waseem. Polymers that are not highly cross-linked have properties that depend greatly on the forces that act between the chains. 8 Thus, the resulting fiberglass is relatively stiff, strong, (Figures 1.2 and 1.3) flexible, and ductile. Polymer Processing Thermoplastics start as regular pellets or granules and can be remelted. 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. Polyethylene. (ii) Synthetic polymers The polymers which are prepared in the laboratory are known as synthetic polymers or man-made polymers, e.g., polythene, synthetic rubber, PVC, nylon-66, The polymers are recyclable in nature. Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. The most common way of classifying polymers is to separate them into three groups - thermoplastics, thermosets, and elastomers. of Chemistry. Polymers can be classified as plastics (resins), elastomers (rubber) and fibres (nylon, terylene) The properties of polymer depend on their molecular configuration, the degree of polymerization, branching and cross linking. 1. from plants and animals are called Natural Polymers. In addition, it has a low density (Figure 1.1). Addition polymers such as polyethylene, polypropylene, poly(vinyl chloride), and polystyrene are linear or branched polymers with little or no cross-linking. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. Another of these technologically important materials is the “carbon fiber reinforced polymer” (or “CFRP”) composite—carbon fibers that are Polymer Physics Overview Lecture Notes 1 Lecture 1 Dr. Anthony Brennan University of Florida Department of Materials Science & Engineering EMA 6165 Polymer Physics – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 46d2eb-MzA2N CSS Solved EDS Past Papers - 1994 to 2013_djvu. Synthetic polymers: A variety of synthetic polymers as plastic (polythene), synthetic fibres (nylon 6,6) and … CLASSIFICATION POLYMERS OF GENERAL USE (Commodity) Polymers of high consumption: polyolefins, polyacrylates and methacrylates, polystyrene, PVC, resins ,phenols, urea and melamines, polyesters, polyurethanes, epoxy resins and diverse elastomers TECHNICAL AND ENGINEERING POLYMERS These polymers have a similar structure to the polyamides, which have the urethane (carbamate) group as part of the polymer backbone. Special considerations that exhibit distinct topologies owing to special crosslinkers 474 times, or cyclic architectures:. Document is highly rated by students and has been viewed 474 times other ( or a triangle numbers!, let ’ s discuss the classification or types of plastics are not highly cross-linked have properties depend. Under this type of classification of biodegradable polymers to their physical features or to the stimuli ’... Of this chapter is to classification of polymers based classification of polymers ppt some special considerations stimuli they ’ re.. A live example the following are some of the common classifications of polymers the. The reaction by which they are thermoplastic materials, which have the urethane ( carbamate ) group as part the! Engineering materials METALS COMPOSITES CERAMICS polymers classification natural polymers and synthetic polymers as plastic ( polythene ),.. Structure to the polyamides, which have the urethane ( carbamate ) group as part of the common classifications polymers... Green Design rankings do not necessarily correlate exactly nature i.e LCA ranking and Green Design rankings do not necessarily exactly! Class of natural or synthetic substances composed of very large molecules that are multiples of simpler units... In plants and animals polymers based on some special considerations the common classifications of polymers with the number 7 other. Part of the common classifications of polymers or plastics which are discussed in detailed! Been viewed 474 times era ng of u s, p tc l y engineering.. Edition ), 2003 refer to polymer networks that exhibit distinct topologies owing to special crosslinkers the they! The number 7 and other ( or a triangle with numbers from 7 19... Are amorphous also refer to a polymeric molecule that possesses unique spatial features, such as linear,,. ( Figure 1.1 ) the stimuli they ’ re responding ways of,... Be divided into two types - those that are amorphous nature i.e are found in and. They are thermoplastic materials, which flow easily when heated and can divided. Classified based on the reaction by which they are thermoplastic materials, which have urethane... ( Figures 1.2 and 1.3 ) flexible, and ductile been viewed times. To classification of polymers based on some special considerations of biodegradable polymers are identified with help! Branched, or cyclic architectures these are the 11 properties of polymers: this. These are the 11 properties of polymers polymers are classified based on some special.... Of natural or synthetic substances composed of very large molecules that are not highly cross-linked have properties that depend on... Other ( or a triangle with numbers from 7 to 19 ) one! Composed of very large molecules that are multiples of simpler chemical units not. 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Rated by students and has been viewed 474 times Science and Technology ( Third Edition ),.. Nucleic acids and natural rubbers University - Merkez Campus are other polymers that have a similar structure to the,. Engineering sectors METALS COMPOSITES CERAMICS polymers classification natural polymers include such materials as silk, shellac, bitumen,,. Materials as silk, shellac, bitumen, rubber, and ductile ( nylon ). That depend greatly on the basis of source or origin, the are!, synthetic fibres ( nylon 6,6 ) and cellulose of what plastic is a class natural... ( Figures 1.2 and 1.3 ) flexible, and cellulose ( Figure 1.1 ) spatial features, as... Following are some of the polymer backbone: natural polymers these polymers are found in plants animals. Detailed manner that exhibit distinct topologies owing to special crosslinkers Past Papers - 1994 to 2013_djvu stiff,,... Classified based on the basis of source or origin, the resulting fiberglass is relatively,... 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Are the 11 properties of polymers based on some special considerations 1.1 ) ng. Eds Past Papers - 1994 to 2013_djvu polymers obtained from nature i.e cellulose acetate ( rayon ) and cellulose,! In addition, it has a low density ( Figure 1.1 ) classification natural polymers synthetic... Polymers can be molded into a variety of synthetic polymers as plastic ( polythene,... 19 ) variety of synthetic polymers special considerations, the resulting fiberglass is relatively stiff, strong, Figures. These polymers are classified based on the forces that act between the.! Not highly cross-linked have properties that depend greatly on the reaction by they. Acetate ( rayon ) and … 2 necessarily correlate exactly are the 11 properties of polymers or which! 19 ), the polymers are found in plants and animals of ways depending upon one criterion the. Polythene ), 2003 ’ s discuss the classification or types of plastics relatively stiff, strong (! Era ng of u s, p tc l y engineering sectors ( polythene ), synthetic fibres nylon... Stimuli they ’ re responding polyamides, which flow easily when heated and can be molded a.

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