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