Crystalline polymers Areas in polymer where chains packed in regular way. ARCHANA S NAIR 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. Modification of Polymer Properties provides, for the first time, in one title, the latest information on gradient IPNs and gradient copolymers. Mechanical Properties PMCs are very popular due to their low cost and simple fabrication methods. -Can produce a wide range of part sizes with different press sizes. The basic concepts of polymer chemistry, polymer properties, types of polymers, polymers in pharmaceutical and biomedical industries, and reviews of some polymeric products in novel drug delivery systems and technologies will be covered. Thermal Properties of Polymers - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Soluble polymers adapt the physical properties of aqueous methods that undergoes thickening, gellation, or stabilization/emulsification. If you continue browsing the site, you agree to the use of cookies on this website. Processing of polymers The Structure and Properties of Polymers - The Structure and Properties of Polymers monomer polymer * * * * * * * * Polyesters The OCR example here is terylene, a polymer of benzene-1,4-dicarboxylic acid and ... | PowerPoint PPT presentation | free to view Polymers 1. Over-aggressive mixing of slime in the plastic bags can lead to rupture, resulting in a slimy mess. Polymers are also known as plastics.
- Excellent surface finish can be obtained. However, slime contains over 90% water and can flow like a liquid. DNA Carbohydrates 4 * 4 4 6 6 7 9 10 10 10 10 10 19 Synthetic and Biological Polymers Polymers: Macromolecules formed by the covalent attachment of a set of small molecules termed monomers. Inter-polymer forces: There are some polymers that have weak forces between their chains, and others that have strong forces. Conductivity decreases with increasing temp. 5. amorphous Pure crystalline specific volume must be known. Degree of Polymerization and Molecular Weight: First of all, let us discuss the degree of polymerization. Conclusion Acknowledgements Glossary Rubbing two polymers together can create static electrical charges which are slow to leak away to earth and cause dust collection and other problems. Looks like you’ve clipped this slide to already. B. See our User Agreement and Privacy Policy. Polymer: A large molecule (macromolecule) built up by repetitive bonding (covalent) of smaller molecules (monomers) • Generally not a well defined structure, or molecular weight. Polymers and their properties. See our Privacy Policy and User Agreement for details. A vast number of biodegradable polymers have been synthesized recently and some microorganisms and enzymes capable of degrading them have been identified. Polymers are materials with a seemingly limitless range of characteristics and colors. Techniques of polymerization: Bulk, emulsion, solution and suspension. Now customize the name of a clipboard to store your clips. The structure and properties of polymers. Mechanical Properties of Polymers Figure 15.17 The stress-strain curve for 6,6-nylon, a typical thermoplastic polymer. Lesson slides to teach AQA properties of polymers AQA 2.2.5. Preparation, properties and uses of Nylon 6,6, and Epoxy resin. PRESENTED BY Reinforcement of polymers by strong fibrous network permits Methods of Polymer Characterization 13. ¾Thermal conductivity of polymers depends on the degree of crystallinity – highly crystalline polymer has higher k Corn kernels have a hard moisture-sealed hull and a softer core with a high moisture content. A PPT explaining thermal properties of polymers. See our User Agreement and Privacy Policy. specifically made of small units bonded into long. (The Science and Engineering of Materials – by D.R. Usefulness of Polypropylene Films Abstract. The molecular weight of commercially available grades ranges from 20,000- 200,000 g mol-I. The structure and properties of polymers ppt video online download. PHARMACEUTICS • Crystalline structure is regular arrangement of atoms. Natural rubber is a completely amorphous polymer. Polymers History Of Polymers Eir PPT. Phule) 1. Conducting Polymer The chemistry Nobel prize in 2000 was awarded for the discovery and study of conducting polymers. Carbon makes up the backbone of the. Functions: 1.Allow rapid freezing of polymer: isolate the cavity and permits ... Microsoft PowerPoint - polymer_processing.ppt Author: Administrator Polymer Processing 11. Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on. Polymers have many inherent properties that can be further enhanced by a wide range of additives to broaden their uses and applications. Polymer matrix composites (PMCs) are present in almost all aspects of modern life - from gadget components to a vast selection of automotive accessories. When kernels are heated, the inner moisture is vaporized and breaks the hull. Polymers are classified as: (1) Man-made or synthetic polymers that are synthesized in the laboratory; (2) Biological polymer that are found in nature. Modelling extension activities suggested for kinaesthetic learners. No public clipboards found for this slide. Differentiated questions lifted from AQA book. No public clipboards found for this slide. Polymer resin not only offers appropriate process characteristics, but also affects the properties of the cured system, although the mechanical properties of a FRP composite are mainly dependent on the type, amount, and orientation of fiber. professor joe greene csu, chico. Additives 6. Fillers Addition of more conductive polymer leads to increase in conductivity Air van der Waals forces decide this inter-polymer force. Crystalinity of polymer The regular arrangement of crystalline polymers leads to higher thermal conductivity than amorphous plastics. Askeland and P.P. The cis-double bonds in the hydrocarbon chain provide planar segments that stiffen, but do not straighten the chain. Lesson slides to teach AQA properties of polymers AQA 2.2.5. The cis-double bonds in the hydrocarbon chain provide planar segments that stiffen, but do not straighten the chain. erosion. Covalent vs. supramolecular polymers Controlled properties via controlled macromolecular architectures Consideration of “cradle-to-grave” Sophisticated Plastics Polymer Chemistry, Chem 466, Spring 2014, January 14, 2014 1 Slime has properties of both solids and liquids. See our Privacy Policy and User Agreement for details. Rheology and Viscoelasticity of Polymers 8. Introduction How Polymers are Configured Intra- and Inter-Polymer Characteristics: Glass Transition Temperature (Tg) and its Physical Meaning Melting and Crystallization Temperatures Tm and Tc Polymer Molecular Weight and its Meanings Mechanical Properties of Polymers Fracture Mechanics of Polymers and its Applications Conclusion About Ceram The chemical structure, sources, production and synthesis methods, physical properties (mechanical, barrier Looks like you’ve clipped this slide to already. Additives 10. Due to its non-toxic nature it is used
- Good mould ability. 1. • Stronger attractive forces between chains = stronger, less flexible polymer. Polymers and the Environment 12. 1. Modelling extension activities suggested for kinaesthetic learners. POLYMER ENGINEERING POLYMER ENGINEERING Dr. Basim Abu-Jdayil Dr. Basim Abu-Jdayil 25 25 Melting point The melting point of a polymer does not occur over a sharp temperature range (1- 2 C) as is observed for small organic molecules. Useful comparison tables which can be supplied as handouts. The corn that One of the great design strengths of composites is the multiple of Chemistry. • When beam of X-ray passed through the polymer sample, some of the regularly arranged atoms reflect the x-ray beam constructively and produce enhanced intense pattern. Other factors (like strain in the polymer) can cause birefringence; Physical Properties: Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on. 7. Presentation Summary : Polymers Additives for Polymers Just as metals are alloyed to improve their properties, substances are added to polymers … polymer characteristics uses Methylcellulose (MC) Water soluble, Viscosity range 10-15,000 MPa for 2% aqueous solution Tablet coating and granulation Ethylcellulose (EC) Insoluble in water Soluble in chloroform, THF Microencapsulation Sustained release tablet coating Hydroxypropylcellulose (HPC) Soluble in cold water and polar organic solvents, insoluble in hot water … MECHANICAL PROPERTIES • Polymers resist differently when they are stressed. Mechanical Properties of Polymers 7. Of these, cross-linking Naveed Khan. Some of these are Polarized Optical Microscopy A quick way to see if a polymer is crystalline. The Structure and Properties of Polymers Powerpoint Presentation . If you continue browsing the site, you agree to the use of cookies on this website. Some of these are discussed herewith in the following sections. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. -Large variety of polymers gives wide range of properties. Like a solid, slime can be formed into a ball and keep its shape. Polymer crystals 7. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. • Need to use statistical properties to describe. 15.1, Callister & Rethwisch 9e. (The Science and Engineering of Materials – by D.R. polymer crystallinity based on changes in volume. Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on. Thermoplastic polymers and thermosetting polymers 5. Askeland and P.P. Properties of Polymers - . Mechanical Properties of Polymers Figure 15.17 The stress-strain curve for 6,6-nylon, a typical thermoplastic polymer. the properties of polymers are: (1) the degree of rigidity of the polymer mole- cules, (2) the electrostatic and van der Waals attractive forces between the chains, (3) the degree to which the chains tend to form crystalline domains, and (4) the degree of cross-linking between the chains. Both amorphous and crystalline areas in same polymer. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. An overview on models relating fiber diameter, process and solution parameters is given by Schubert while a novel theory is suggested predicting not onnly the fiber diameter but also its distribution. hydrogen are classified as organic polymers. Some of the useful properties of various engineering polymers are high strength or modulus to weight ratios (light weight but comparatively stiff and strong), toughness, resilience, resistance to corrosion, lack of conductivity (heat and electrical), color, transparency, processing, and low cost. Properties of polymers: Tg, Tacticity, Molecular weight – weight average, number average and polydispersity index. Industrial Applications: Polypropylene sheets are widely used in industrial sector to produce acid and chemical tanks, sheets, pipes, Returnable Transport Packaging (RTP), etc. Unfortunately, the potentially useful properties of raw latex rubber are limited by temperature dependence; however, these properties can be modified by chemical change. Self-healing polymers are a class of materials receiving a resurgence of interest, as there is a growing interest to integrate molecular level functionality enabling the repair of damage, impart reprocessability, or enable longer lifetimes in cross-linked polymeric materials [322–333]. The Structure and Properties of Polymers monomer polymer – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 6b7132-N2RlN … • Need to use statistical properties to describe. Introducing polymer chemistry into an undergraduate chemistry. Self-Healing Polymer. Polymers are formed by linking monomers through chemical reaction — called polymerization. Polymers are formed by linking monomers through chemical reaction — called polymerization. You can change your ad preferences anytime. Clipping is a handy way to collect important slides you want to go back to later. the properties of polymers are: (1) the degree of rigidity of the polymer mole- cules, (2) the electrostatic and van der Waals attractive forces between the chains, (3) the degree to which the chains tend to form crystalline domains, and (4) the degree of cross-linking between the chains. Polymers display VISCOELASTIC properties They stretch (elastic) and they flow (viscous) • Because of the entanglement of the molecules thermoplastic materials have different properties compared to other solid materials like metals. If you continue browsing the site, you agree to the use of cookies on this website. properties of polymers & different polymer characterisation techniques. The Structure and Properties of Polymers Also known as Bonding + Properties What is a polymer?
- Poor tensile strength. Characteristics of Polymers
- Low Density. POLYMERS and their PROPERTIES
- Introduction
- Basic Topics:
- Types of Polymers
- Classification of Polymers
- Characteristics of Polymers
- Properties of Polymers
- Strength of Polymers
- Applications of Polymers
- Good corrosion resistance. Useful comparison tables which can be supplied as handouts.
- Economical. because of its properties like high tensile strength, resistance to high temperatures and corrosion resistance. Polymer properties. 5. Polymers have many inherent properties that can be further enhanced by a wide range of additives to broaden their uses and applications. carbon backbone. Hydrocarbon polymers average of 100 repeating units necessary but only 40 for nylons. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. properties of the polymer. Such materials are increasingly used in infrastructure construction for instance structural components, protective coating, and adhesives. ing pharmaceutical polymers. If a polymer becomes a melt, there is usually a range of as much as 50 C over which the viscosity of the polymer slowly changes from that of a solid to that of a liquid. These two factors can help in understanding the varied properties of polymers and also the reason why polymers are very different from materials like metals and ceramics. Download The Structure and Properties of Polymers PPT for free. 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. The word polymer is derived from the classical Greek words poly meaning “many” and meres meaning “parts.” Simply stated, a polymer is a long-chain molecule that is composed of a large number of repeating units of identical structure. Structure features of polymers 4. The book covers the broad range of polymer modification routes in a fresh, current view representing a timely addition to the technical literature of this important area.
- Can be produced with close dimensional tolerances. Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on. Natural rubber is a completely amorphous polymer. As chain length and cross-linking increases the tensile strength of the polymer increases. different polymers have different properties. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Difficult to analyze data, determine structure. 2. Mechanical properties of polymers 8.
- Low coefficient of friction. Polymers can be made to mimic cotton, silk, and wool fibers; porcelain and marble; and aluminum and zinc. Malaviya National Institute Of Technology Jaipur, Polymer science: preparation and uses of polymers. A long molecule made up from lots of small molecules called PPT Since polymers are often used as clear plastics or coatings and have many applications in which transparency is an important property, a knowledge of the optical properties of specific polymers … Rubber toughening is a process in which rubber nanoparticles are interspersed within a polymer matrix to increase the mechanical robustness, or toughness, of the material.By "toughening" a polymer it is meant that the ability of the polymeric substance to absorb energy and plastically deform without fracture is increased. Polymerization 3. The Structure of Polymers (plastics) Polymers that contain primarily carbon and. Presentation Title: The Structure And Properties Of Polymers. 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Are increasingly used in infrastructure construction for instance structural components, protective coating, and dynamic loading variety of.! Forces between chains = Stronger, less flexible polymer our Privacy Policy and User Agreement for details be into... — called polymerization as Bonding + properties What is a polymer polymerization molecular! To classification of biodegradable polymers, bending, sudden stress, and to provide you with relevant advertising -can a... You more relevant ads important slides you want to go back to later and enzymes capable of degrading have. An applied stress they change state from crystalline to semi-crystalline leads to higher thermal conductivity amorphous... Awarded for the discovery and study of conducting polymers < li > Good mould ability polymer contains crystalline! Processing of polymers PPT for free and chemical properties of polymers gives wide range characteristics!
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- Low Density. POLYMERS and their PROPERTIES