Synthetic Polymers. The following are some of the common classifications of polymers: Under this type of classification, there are three sub categories. 1. (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, Polymer Processing Thermoplastics start as regular pellets or granules and can be remelted. There are other polymers that have a id era ng of u s, p tc l y engineering sectors. CHE407B (1).pdf. POLYMERS.ppt. Semi-synthetic polymers: Cellulose derivatives as cellulose acetate (rayon) and cellulose nitrate, etc. These polymers have a similar structure to the polyamides, which have the urethane (carbamate) group as part of the polymer backbone. Polymers that are not highly cross-linked have properties that depend greatly on the forces that act between the 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. Close suggestions. Natural polymers include such materials as silk, shellac, bitumen, rubber, and cellulose. We highlighted that LCA ranking and Green Design rankings do not necessarily correlate exactly. The polymers are recyclable in nature. Polymer nanocomposites – synthesis techniques, classification and properties Waseem. 2. This video explains the definition and classification of Polymers with the help of a live example. | PowerPoint PPT presentation | free to view Sep 13, 2020 - Chapter 15 - Polymers - PPT, The Science and Engineering of Materials Notes | EduRev is made by best teachers of . Classification of Polymers Polymers are classified based on the reaction by which they are formed. These include starch cellulose proteins, nucleic acids and natural rubbers. Another of these technologically important materials is the “carbon fiber reinforced polymer” (or “CFRP”) composite—carbon fibers that are Classification of Polymers. 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. Feb2018.ppt from METE 230 at Middle East Technical University - Merkez Campus. 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. E.Ann MacGregor, in Encyclopedia of Physical Science and Technology (Third Edition), 2003. 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. 1. 2. They are identified with the number 7 and OTHER (or a triangle with numbers from 7 to 19). 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. ENGINEERING MATERIALS METALS COMPOSITES CERAMICS POLYMERS Classification Now, let’s discuss the Classification or Types of Plastics. II.E Polymer-Polymer Interactions. 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 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. Mats. Natural polymers: These polymers are found in plants and animals.Examples are proteins, cellulose, starch, resins and rubber. 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 Thermosetting materials start as liquids/syrups, often called "resins", as powders or partially cured products ("preforms") which need heat for the shaping phase. Regarding the physical shape, they can be classified as free linear chain solutions, reversible gels covalently cross linked and polymer chain grafted on a surface [15]. 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. What are polymers? 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. of Chemistry. The objective of this chapter is to classification of biodegradable polymers. Classification and properties of biodegradable polymers Polyethylene. 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. Classification of Polymers based upon Sources : Depending on the source the polymers are classified into two classes : Natural Polymers. Classification of Polymers Based on Source of Origin (i) Natural polymers Those polymers which occur in nature. •Silk is a polymer of the amino acids glycine and alanine •Wool is having disulphide (sulphur-sulphur) bonds to link the polymer chains together. There are several ways of classification of polymers based on some special considerations. from plants and animals are called Natural Polymers. i.e., in plants or animals. These are the 11 properties of polymers or plastics which are discussed in a detailed manner. Hope you had got an idea of what plastic is? For example, polyhydroxyalkanoate from corn grain (PHA-G) ranked very high in the Green Design ranking, but had […] It could also refer to polymer networks that exhibit distinct topologies owing to special crosslinkers. 8 Thus, the resulting fiberglass is relatively stiff, strong, (Figures 1.2 and 1.3) flexible, and ductile. POLYMERS.ppt. are called natural polymers. Conducting polymers (CPs) are an exciting new class of electronic materials, which … Download now. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. Types of Plastics: They are two types of Plastics: 2 V.S.Saravana Mani, Head& Asso.Prof, Dept. 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 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). CSS Solved EDS Past Papers - 1994 to 2013_djvu. Chapter 1:Classification of Materials. Would you like to get the full Thesis from Shodh ganga along with citation details? Addition polymers such as polyethylene, polypropylene, poly(vinyl chloride), and polystyrene are linear or branched polymers with little or no cross-linking. Natural Polymers : The polymers obtained from nature i.e. As a result, they are thermoplastic materials, which flow easily when heated and can be molded into a variety of shapes. Linear copolymers can be further classified into several categories such as 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. 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. Natural polymers These polymers are found in plants and animals. S. Khan1, Nawaf. Topological polymers may refer to a polymeric molecule that possesses unique spatial features, such as linear, branched, or cyclic architectures. Synthetic polymers: A variety of synthetic polymers as plastic (polythene), synthetic fibres (nylon 6,6) and … POLYMERS.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. View Notes - 1 - Classification of Eng. In addition, it has a low density (Figure 1.1). 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 Search Search. This review article focuses on conducting polymers and their applications. are the usual examples of this subcategory. The most common way of classifying polymers is to separate them into three groups - thermoplastics, thermosets, and elastomers. Polymers are classified in a number of ways depending upon one criterion or the other as described below. The Society of the Plastics Industry (SPI) established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic. Polymer - definition and classification of polymers. Jump to Page . This document is highly rated by students and has been viewed 474 times. 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