Conducting polymers (CPs) are an exciting new class of electronic materials, which … Classification of Polymers based upon Sources : Depending on the source the polymers are classified into two classes : Natural Polymers. These polymers have a similar structure to the polyamides, which have the urethane (carbamate) group as part of the polymer backbone. Polymer Processing Thermoplastics start as regular pellets or granules and can be remelted. 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 CSS Solved EDS Past Papers - 1994 to 2013_djvu. Types of Plastics: They are two types of Plastics: Classification and properties of biodegradable polymers POLYMERS.ppt. Polymers that are not highly cross-linked have properties that depend greatly on the forces that act between the chains. 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 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]. 2. We highlighted that LCA ranking and Green Design rankings do not necessarily correlate exactly. What are polymers? Now, let’s discuss the Classification or Types of Plastics. (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, Would you like to get the full Thesis from Shodh ganga along with citation details? Natural Polymers : The polymers obtained from nature i.e. 2 V.S.Saravana Mani, Head& Asso.Prof, Dept. Classification of Polymers Polymers are classified based on the reaction by which they are formed. For example, polyhydroxyalkanoate from corn grain (PHA-G) ranked very high in the Green Design ranking, but had […] Polymer - definition and classification of polymers. 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. View Notes - 1 - Classification of Eng. 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. Another of these technologically important materials is the “carbon fiber reinforced polymer” (or “CFRP”) composite—carbon fibers that are This review article focuses on conducting polymers and their applications. | PowerPoint PPT presentation | free to view 2. Classification of Polymers Based on Source of Origin (i) Natural polymers Those polymers which occur in nature. In addition, it has a low density (Figure 1.1). CLASSIFICATION OF SMART POLYMERS Smart polymers can be classified according to their physical features or to the stimuli they’re responding. 8 Thus, the resulting fiberglass is relatively stiff, strong, (Figures 1.2 and 1.3) flexible, and ductile. Polymer nanocomposites – synthesis techniques, classification and properties Waseem. of Chemistry. On the basis of source or origin, the polymers are classified into two types: Natural polymers and Synthetic polymers. The most common way of classifying polymers is to separate them into three groups - thermoplastics, thermosets, and elastomers. 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). CHE407B (1).pdf. Search Search. There are several ways of classification of polymers based on some special considerations. •Silk is a polymer of the amino acids glycine and alanine •Wool is having disulphide (sulphur-sulphur) bonds to link the polymer chains together. Thermosetting materials start as liquids/syrups, often called "resins", as powders or partially cured products ("preforms") which need heat for the shaping phase. Download now. 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. Chapter 1:Classification of Materials. 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. Natural polymers include such materials as silk, shellac, bitumen, rubber, and cellulose. 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