Closed loop recycling does occur, but sometimes the most valuable use for a recycled plastic is into an application different than the original use. Thermal resistance is evident in the kitchen with pot and pan handles made of polymers, the coffee pot handles, the foam core of refrigerators and freezers, insulated cups, coolers, and microwave cookware. Extrusion produces thin fibers or heavy pipes or films or food bottles. Rubber tree latex and cellulose have been used as raw material to make manufactured polymeric rubber and plastics. 2  American Chemistry Council, “2005 National Post-Consumer Plastics Bottle Recycling Report”.

Complete the revision questions page 200 (1 - 2), Linear polymers are those in which the main, The way in which side branches are arranged on, Greater effect of dispersion forces therefore, Irregular points on both sides of the linear. Compostable plastics frequently require more intense conditions to decompose than are available in backyard compost piles. When localities decide to use waste-to-energy systems to manage solid waste, plastics can be a useful component. Polymers are the materials of past, present and future generations. Due to increased entanglement of chains with increased molecular weight, the polymer gets higher viscosity in molten state, which makes the processing of polymer difficult. Consider the range of applications, from toys to the frame structure of space stations, or from delicate nylon fiber in pantyhose to Kevlar, which is used in bulletproof vests. Polymers are usually made of petroleum, but not always.

Manufactured polymers can also be one-dimensional chains that can be melted. There are also some polymers that, instead of having a carbon backbone, have a silicon or phosphorous backbone. Looks like you’ve clipped this slide to already. A chemical compound or mixture of compounds formed by polymerization and consisting essentially of repeating structural units is called ‘Polymer’. The degree of polymerization (DP)-n in a polymer molecule is defined as the number of repeating units in the polymer chain.

Crosslinking. - STRUCTURE OF METALS Materials Science * Metals and some ceramics form crystalline structures Polymers are mostly non-crystalline. Polymers History Of Polymers Eir PPT. Material Properties of Plastics 1.1 Formation and Structure The basic structure of plastics (or polymers) is given by macromolecule chains, formulated from monomer units by chemical reactions. Physical-chemical properties of biopolymers. Some plastics can be composted either because of special additives or because of the construction of the polymers. Introduction: Organic polymers are normally insulators, it can be presumed that conducting polymers must have an unusual structure. Polymers can be very resistant to chemicals. For 20051 the EPA characterization of municipal solid waste before recycling for the United States showed plastics made up 11.8 percent of our trash by weight compared to paper that constituted 34.2 percent. If so, share your PPT presentation slides online with CrystalGraphics 3D Character Slides for PowerPoint, - CrystalGraphics 3D Character Slides for PowerPoint. Lesson slides to teach AQA properties of polymers AQA 2.2.5. A long molecule made up ... Density functional theory calculation of dielectric properties of thin film, - Title: Density functional theory calculation of dielectric properties of thin film Author: Ning Shi Last modified by: ning Created Date: 5/2/2005 11:06:22 AM, Chapter 5: The Structure and Function of Macromolecules, - Chapter 5: The Structure and Function of Macromolecules. Applied chemistry. It depends on chemical nature, geometrical structure, molecular weight and molecular weight distribution etc. presentations for free.

Our new CrystalGraphics Chart and Diagram Slides for PowerPoint is a collection of over 1000 impressively designed data-driven chart and editable diagram s guaranteed to impress any audience. This resource is designed for UK teachers. Plastic bottles, films, cups, and fibers are thermoplastic plastics.

Polymers are classified as: (1) Man-made or synthetic polymers that are synthesized in the laboratory; (2) Biological polymer that are found in nature. Polymers range from familiar synthetic plastic such as polystyrene to natural bio-polymers such as DNA and proteins that are fundamental to biological structure and function. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Chains of molecules cannot get close together, This varying degree of randomness will affect the, The less random, the stronger the polymer and the, This is because in a more ordered polymer they, Cross links are covalent bonds that can form, If the number of crosslinks is small an elastomer, If the number of crosslinks is large a hard, To make a thermosetting polymer, the linear, The cross linking is brought about either by heat, Araldite is a good example of a two part glue, Condensation polymerisation uses monomers that, Polymerisation occurs when these monomers react, A small molecule (often water) is eliminated, They also involve the elimination of water or, Monomer A Monomer B ? There are also some polymers that, instead of. To make the chain, many links or “-mers” are chemically hooked or polymerized together. Modelling extension activities suggested for kinaesthetic learners. Useful comparison tables which can be supplied as handouts. Now customize the name of a clipboard to store your clips.

Differentiated questions lifted from AQA book. For example. Polymers affect every day of our life. The Lautenberg Chemical Safety Act updated TSCA to protect Americans' health and our environment, and supports economic growth and manufacturing in the U.S. ©2005-2020 American Chemistry Council, Inc. Download The Structure and Properties of Polymers PPT for free. - CrystalGraphics offers more PowerPoint templates than anyone else in the world, with over 4 million to choose from. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads.

Polymers can be made to mimic cotton, silk, and wool fibers; porcelain and marble; and aluminum and zinc. Plastics can be molded into drums or be mixed with solvents to become adhesives or paints. There are polymers that contain only carbon and hydrogen atoms. Factor that Control Crystallinity of Polymer: Comparison of properties of crystalline and amorphous polymer: Denim Wet Process | Bleach Wash | Acid Wash, Garment Finishing | Pressing | Flow Chart of Garment Finishing, Quality Control | AQL (Acceptance Quality Level), Colour Fastness of Textiles | Color Fastness To Washing, Colour Fastness of Textiles | Colour Fastness to Light, Inspection | Steps in Garments Inspection, Cutting Section in Apparel Industry | Cutting Room Terminology, Textile Testing and Quality Control – TTQC, Natural Color Substances for Textile Materials, Thermal Properties of Polymers | Melting Point and Glass Transition Temperature, Dyeing Auxiliaries | Function of Auxiliaries | Dyeing Method of Vat Dye | part 02, Textile Printing | Feature of Textile Printing | Process flowchart of textile printing, Reactive dye || Reactive dye features || Reactive dye classification, Melt Spinning , Dry spinning and Wet Spinning Method, Melt Spinning , Dry spinning and Wet Spinning Method (37241), Regularity of the molecular structure of the polymer chain: In general, crystalline substance is of regular molecular, Polarity: Polarity increases the crystallinty of a polymer, The mobility of polymer chain: The mobility of polymer chain is another factor that control crystallinity of polymer.

The majority of manufactured polymers are thermoplastic, meaning that once the polymer is formed it can be heated and reformed over and over again. Food waste made up 11.9 percent of municipal solid waste.

PHARMACEUTICS - Download free PDF Sample: #CastPolymer #MarketAnalysis Cast polymer is a product of the process of enhancing the physical properties of materials by employing techniques of strengthening.In addition, cast polymers undergo a molding process to improve their strengthening capabilities.


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