Polymers ppt. Reviews. Item 1. It covers topics like polymerization, polymer processing, and biodegradable polymers with examples and diagrams. Jul 21, 2014 · Polymers Large molecules synthesized by bringing together many smaller molecules called monomers. Physical Properties OF Addition Polymers The principal characteristics associated with polymers are a consequence of the nature and covalent arrangement of the monomers units. Doping involves adding molecules that remove or insert electrons into the polymer's molecular structure, leaving charged areas that allow electron movement along the polymer chain. HISTORY OF POLYMERHISTORY OF POLYMER In 1811, Henri Braconnot did pioneering work on cellulose. More monomer molecules joined in units of long polymer. Polymers are often divided into three classifications: thermoplasts, thermosets, and Apr 4, 2019 · Polymers. , 4) It is resistance to water, alcohol. 2. Classification by Chain structure (molecular architecture) • Linear chains : a polymer consisting of a single continuous chain of repeat units • Branched chains :a polymer that includes side chains of repeat units connecting onto the main chain of repeat units • Hyper branched polymer consist of a constitutional repeating unit Aug 6, 2023 · Conductive polymers can be created by doping traditionally insulating plastics like polyacetylene. Applications include medical devices, packaging and conductive fabrics Feb 14, 2017 · Smart polymers undergo reversible physical or chemical changes in response to small environmental variations such as temperature, pH, light, or enzymes. Polymers can be used to conceal the flavor of a medicine, improve its stability, and change its release properties. • Natural polymeric materials such as hemp, shellac, amber, wool, silk, and natural rubber have been used for centuries. By PresenterMedia. Formation of polymers: Polymerization is the process of joining together many monomers, the basic building blocks of polymers, to form the chains. Controlled properties via controlled macromolecular architectures. There are two main kinds of polymers. M. Classification of polymers depending on their structure Cross-linked polymers Introduction to Polymers 10 Using appropriate monomers Chemical reactions Polymer molecules are connected together at points other than their ends Crosslinked polymers do not dissolve but can be swelled by liquids. • A polymer is a large molecule formed by repeated linking of the small molecules called “monomers”. 6. Compare difference between polymers and monomers. Polymers Large molecules synthesized by bringing together many smaller molecules called monomers. Type 1: Addition Polymers Each small molecule adds to the end of a growing chain. Weaker intermolecular forces between chains must be considered. The properties of a polymer depend on factors like chain length, bonding between chains, crystallinity, and cross-linking. com - id: 3fd938-ZDE1Y Sep 19, 2020 · This document provides an introduction to polymer chemistry. Describe a polymer’s structure in terms of –mer type ordering, tacticity, and backbone chain configuration. A vast number of biodegradable polymers (e. Dec 9, 2013 · Polymers - Download as a PDF or view online for free. Thermoplastics - Linear or branched polymers in which chains of molecules are not interconnected to one another. pptx or . Polymers are classified based on their origin, structure, and mode of polymerization. The notes and questions for POLYMERS - PowerPoint Presentation, Science, Chemistry, class 12 have been prepared according to the Class 12 exam syllabus. “polymer” – Greek word “polys” = many and “ meros ” = parts Polymers – macromolecules composed of repeating structural units called monomers. 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. Lecture 1: General Introduction to Polymers. In the nineteenth century vulcanization is improved . Beginning early in the 20 th c, synthetic polymers were made (e. Distinguish between addition and condensation polymers. Amine Polymers Ppt Presentation Cpp. 10 Properties of Polymers The physical properties of a polymer, such as its strength and flexibility depend on: Chain length - in general, the longer the chains the stronger the polymer; Side groups - polar side groups give stronger attraction between polymer chains, making the polymer stronger; Branching - straight, un branched chains can pack together more closely than highly branched chains Aug 28, 2015 · Natural polymers: those isolated from natural materials are called natural polymers. Slowly polymer goes into solution a viscous polymer solution which is heterogeneous. Jul 25, 2020 · 4. May 11, 2010 · The document discusses polymeric biomaterials, including both natural and synthetic polymers. Item 2. Polymers can be made of one type of monomer or multiple types. All the Polymer PowerPoint templates are natively built in PowerPoint, using placeholders on the slide master, color palettes, and other features in PowerPoint, and can contain layouts, theme colors, theme fonts, theme effects, background styles, and even content (according to Microsoft Office). A polymer is a large molecule (macromolecule) composed of repeating structural units typically connected by covalent chemical bonds. Covalent bonds do not account for most of polymers. • All biodegradable polymers should be stable and durable enough for use in their particular application, but upon disposal they should easily break down. Classification i) On the basis of origin –Natural –Synthetic ii) On the basis of nature of monomer •Homopolymers(comprise of monomers of the same type) –Linear (homochain or heterochain) –Branched –Cross-linked •Heteropolymers/ Copolymers (Different repeating units) –Linear; Branched; Graft (regular/irregular); Block Nov 25, 2019 · • The word polymer is derived from the Greek poly and meros, meaning many and parts, respectively. Apr 19, 2017 · Polymerization - Download as a PDF or view online for free. ADVANTAGES • The polymer have been synthesized for specific need and to solve problems related with development of drug delivery system. Polymers Polymers: What are they? Different Types Uses and Applications Chemical Make-up Polymers - What are they? Polymers are a special kind of macromolecule The word polymer comes from the Greek words “poly,” meaning “many”, and “meres,” meaning “parts” or “repeating units” A Polymer consists of a large chain of repeating molecules (monomers) that are attached in an end Introduction to Polymer Functionalization: Motivations, Yield, Crystallinity, Solubility Issues. • A few ‘crosslinks’ are introduced in between the chains, which help the polymer to retract to its original position after the force is released as in vulcanised rubber. This gives the polymer properties similar to conductors like metals. 2) Polymerization is initiated by a reactive site on a monomer that is produced using an initiator. Elastomers - These are polymers (thermoplastics or lightly cross-linked thermosets) that have an elastic Starch is a polymer of glucose, cellulose is also a polymer of glucose, proteins are polymers of amino acids. Combine monomers to make meaningful polymers. Some classes may treat this as review material. Polymerisation : The process of formation of polymers. • Applicationsof polymers in construction include areas such as flooring, windows, cladding, rainwater,pipes, membranes, seals, glazing, insulation and signage. By Mr. 13 Introduction to Polymers 2. Poly means MANY and MER means repeating unit . It is useful to share insightful information on Amine Polymers This PPT slide can be easily accessed in standard screen and widescreen aspect ratios. e. Polymers which are degraded and decayed by microorganisms, like bacteria, are known as biodegradable polymers. Polymers are macromolecules formed by linking together of a large number of small molecules called monomers. It discusses several ways polymers can be classified, including by source (natural, semisynthetic, synthetic), structure (linear, branched, cross-linked), polymerization process (addition, condensation), molecular forces (elastomers, fibers, thermoplastics, thermosets), and monomer type (homopolymers Aug 22, 2017 · INTRODUCTION • A word polymer is a combination of two Greek words, “Poly” means “many” and “Mers” meaning “parts or units”. It describes commonly used natural polymers like collagen, chitosan, and alginate, which are biodegradable and can be processed into various formats. In medicine and other fields, biodegradable materials are used Oct 24, 2014 · POLYMERS. com. Jul 24, 2014 · Introduction to Polymers and Plastics. polymer that will fully decompose to carbon dioxide, methane, water, biomass and inorganic compounds under aerobic or anaerobic conditions. A polymer is analogous to a necklace made from many small beads (monomers). It classifies polymers based on their linking, including linear, branched, and cross-linked polymers. There are several types of polymers classified by their source, structure, and method of formation. Objectives . stress-strain behavior of polymers brittle polymer FS of polymer ca. , 5) It is harder and stronger than the other polymers. In 1811, Henri Braconnot did pioneering work on cellulose. • The term 'biodegradation' is limited to the description of chemical processes (chemical changes Inorganic Polymers: Backbone constituted by elements other than carbon; On the basis of their synthesis: Natural Polymers; Synthetic Polymers; Biodegradable Polymers. It defines polymers as long molecules composed of repeating monomer units bonded together, and describes different polymer structures like linear, branched and crosslinked. The most common polymers are polyethylene, polypropylene, polystyrene, and polyvinyl chloride. Jan 22, 2013 · The document discusses the structure and properties of polymers. Polyether- impression material. 5. Dec 6, 2016 · A PDF document that provides an overview of polymers, their classification, types, properties, and applications. retrosynthetic analyses. Narkhede. Covalent vs. The polymers are giant molecules with high molecular masses. In the nineteenth century vulcanization is improved . cotton , silk, wool and rubber. Polymers can be natural, synthetic, or semi-synthetic and can have linear, branched, or cross-linked structures. 4 years ago Apr 20, 2014 · 3. 96 0. Polymers are classified as thermoplastics, elastomers or thermosets based on their properties when heated. supramolecular polymers. Dookoo. Apr 9, 2015 · • Polymers are very long molecules typicallymade up of many thousands of repeat units. Define polymers. Departments of Chemistry & Chemical Engineering Texas A&M University. cellulose, chitin, starch Jan 9, 2016 · In these elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. Polymers can be classified as natural or synthetic, and as thermoplastics, thermosets, or elastomers depending on their molecular structure and response to heat. Learn about natural, synthetic, and semi-synthetic polymers, addition and condensation polymerization, and polymer properties and processing. 10. • More monomer molecules joined in units of long polymer. The document summarizes a seminar on polymer science presented by Kantilal B. Feb 26, 2016 · Polymers - Download as a PDF or view online for free. 92 Tensile strength (psi) 5,500 3,000 Young’s modulus (psi) 180,000 40,000 Applications Propane gas Baby oil Parafin wax Polyethylenes Mar 25, 2024 · A great powerpoint about polymers and plastics. • Some scientists prefer to use the word macromolecule, or large molecule, instead of polymer. Apr 25, 2014 · This document provides an overview of polymers including their types, classifications, characteristics, and applications. The PowerPoint can be downloaded from the Resource section: Polymer Structure (PPT). Utensils made from biodegradable plastic. Dec 11, 2021 · Page 13 : Teflon (Polytetrafluoroethylene) (PTFE), , Properties, 1) It has high molecular weight. Polysulphide - “ “ Silicone “ “ Polycarbonates- temporary crown material Polyacrylic acid- denture base material The Structure and Properties of Polymers monomer polymer * * * * * * * * Polyesters The OCR example here is terylene, a polymer of benzene-1,4-dicarboxylic acid and – A free PowerPoint PPT presentation (displayed as an HTML5 slide show) on PowerShow. 5 Something went wrong, please try again later. Tes classic free licence. , 2) It has low coefficient of friction. . Chapter 14 - 3 Ancient Polymer History • Originally natural polymers were used – Wood – Rubber – Cotton – Wool – Leather – Silk • Oldest known uses Feb 28, 2016 · 9 Polymer Synthesis • There are two major classes of polymer formation mechanisms – Addition polymerization: The polymer grows by sequential addition of monomers to a reactive site • Chain growth is linear • Maximum molecular weight is obtained early in the reaction – Step-Growth polymerization: Monomers react together to make small Jan 1, 2021 · 7. , 2) It is used as an insulating Nov 8, 2021 · 5. Jun 18, 2020 · 10. Apr 24, 2015 · Download or view online a presentation on polymers, their types, classifications, characteristics, and applications. These weak binding forces permit the polymer to be stretched. It covers the following key points in 3 sentences: The presentation introduces polymers as large molecules composed of repeating structural units connected by covalent bonds. N(CH 2 -CH 2 ) (-CH 2 -CH 2 -) n Ethylene Polyethylene Monomers form polymers by forming chemical bonds or binding supramolecularly through Jan 1, 2017 · This document discusses polymer characteristics and classifications. RESINS USED IN DENTISTRY Resins are hard, brittle glassy polymers. Natural rubber consists of repeat units of isoprene (2-Methyl-1,3-Butadiene). It defines key terms like polymer, monomer, and polymerization. These types of polymers are used in surgical bandages, capsule Aug 31, 2016 · Polymers can be classified based on their structure, source, number of monomers, arrangement of monomers, and configuration. Polymers are the major tool for controlling the medication release rate from the formulation. , Applications, 1) It is used in containers and pipework for reactive, and corrosive chemicals. g. In 1907, Leo Baekeland created the first synthetic polymerIn 1907, Leo Jul 24, 2014 · Polymers are large molecules composed of repeating structural units called monomers. Jul 18, 2014 · Polymers. , 3) It has low chemical reactivity. It defines polymers as large molecules formed from monomers linking together in chains. • Polymers are macromolecules built up by the linking together of large numbers of much smaller molecules. Examples of addition polymers. polyethylene • Variation in crystallization and orientation results in vast morphologies of polymers today • Properties of polymers: - good chemical resistivity at room temperature - low density and Young’s modulus - brittleness at Feb 26, 2012 · Properties of Polymers The physical properties of a polymer, such as its strength and flexibility depend on: Chain length - in general, the longer the chains the stronger the polymer; Side groups - polar side groups give stronger attraction between polymer chains, making the polymer stronger; Branching - straight, un branched chains can pack Nov 2, 2014 · Polymers - Download as a PDF or view online for free. The document also summarizes different polymerization PPT slide on POLYMERS compiled by Mudasir Ahmad Hafiz. Principal polymers- Vulcanized rubber for denture bases. Sep 9, 2014 · Polymers are large molecules formed by combining many small repeating units called monomers. A PowerPoint template is a pattern or blueprint for your slides that you save as a . lennie_visbal1965. Explain how polymer structure determines material properties, such as flexibility or transparency. 10% or less) The document discusses a seminar presentation on polymer science. It defines polymers as long molecules composed of repeating structural units called monomers. e. Properties/Characteristics • Even though biodegradable polymers have numerous applications, there are properties that tend to be common among them. Dec 6, 2019 · Common Examples of Polymers • Polymers are of two types: naturally occurring and synthetic or man made. The repeating structural units are called Monomers . Karen L. PowerPoint Presentation. Advanced polymers - applications Outline Polymers Dr. For example, the ethyl alcohol monomer has the chemical formula • The monomer vinyl chloride has the chemical formula C2H3Cl, which, on polymerization, becomes polyvinyl ch Jul 10, 2017 · 1) Polymers are large molecules formed from the combination of small molecules called monomers through a process called polymerization. General Reaction. Common types of polymers include linear, branched, and cross-linked polymers. Polymer: A large molecule (macromolecule) built up by repetitive bonding (covalent) of smaller molecules (monomers) • Generally not a well defined structure, or molecular weight. Polymer basics • Long chain like molecular structure where repeated molecular units are connected by covalent bonds • Polymers used as insulators eg. Synthetic polymers discussed include PVC, PMMA, PP, and PS. Addition Polymers of Alkenes. Significance of Polymers in CRDDS In the field of drug delivery, polymers are becoming increasingly significant. The document further Sep 8, 2013 · Polymer Degradation • Polymer degradation is a change in the properties – tensile strength, colour, shape, etc of a polymer or polymer based product under the influence of one or more environmental factors such as heat, light or chemicals. • Polymers have been mainly used to control the drug release rate from the formulations as well as a taste masking agent, stabilizer and protective agent in oral drug delivery. Wooley. It discusses the definition of polymers, types of linking in polymers including linear, branched and cross linked polymers. Biodegradable Polymers general scientific definition of a biodegradable polymer : A polymer in which degradation is mediated at least in part by a biological system. A variety of other natural polymers exist, such as cellulose, which is the main constituent of wood and paper. Polymers can be classified in several ways, including by origin (natural, synthetic, semi-synthetic), properties/applications (rubbers, plastics, fibers), thermal response (thermoplastics, thermosets), and monomer structure (homopolymers, co-polymers like random Sep 28, 2020 · Solubility: When a polymer is dissolved in a suitable solvent, the polymer absorbs water and swells in size. Bakelite and nylon). Bakelite and nylon The first polymers used were natural products, especially cotton, starch, proteins, and wool. Disclaimer: LearnPick is an online tutoring marketplace and platform connecting students with excellent tutors and instructors. Temperature-responsive polymers include shape-memory materials, liquid crystalline materials, and responsive polymer solutions. It also covers classification of polymers based on properties and characteristics, types of polymerization including addition and condensation polymerization. Mar 18, 2024 · 3. Synthetic vs. Oct 13, 2014 · • What are the primary polymer processing methods? Mechanical Properties • i. Document Description: POLYMERS - PowerPoint Presentation, Science, Chemistry, class 12 for Class 12 2024 is part of Class 12 preparation. What is a Polymer?. Later- Acrylic resins. 7. Synthetic polymers: polymers synthesized from low molecular weight compounds are called synthetic polymers. Epoxy resins- die material. Like this polymer behave differently towards the solvents. Thermosetting polymers- Polymers that are heavily cross-linked to produce a strong three dimensional network structure. Polyethylene, Nylon , PVC and Terylene. This PowerPoint slide showcases four stages. • biodegradable polymers have the potential to be the solution to range of Mar 27, 2019 · 7. Where as a non- polymer like NaCl when added to water, ionizes and form homogeneous solution. Explain how crosslinking produces the characteristic properties of an elastomer. Conductive polymers can transport electricity through conjugated pi electrons on their backbone, making them semiconductors when doped. Polymer applications Plastics, elastomers, fibers, coatings, Polymer additives • fillers • plasticizers • stabilizers • colorants • flame retardants Advanced polymers • ultrahigh molecular weight polyethylene • liquid crystal polymers • thermoplastic elastomers Oct 31, 2019 · 13. Molecular Structure and Classification of polymersMolecular Structure and Classification of polymers Molecular shape (conformation) Molecular chains may thus bend, coil and kink Neighboring chains may intertwine and entangle Conformation-Molecular orientation can changed by rotation around the bonds 7 bonds Large elastic extensions of rubbers correspond to unraveling of these coiled chains May 26, 2016 · 5. Polymers are macromolecules formed by joining of repeating structural units on a large scale. Polymers in dentistry are: Vinyl acrylics- relining material. 10% that of metals plastic elastomer elastic modulus – less than metal Strains – deformations > 1000% possible (for metals, maximum strainca. Polyethylene is an example. Polymers are also classified as natural, semi-synthetic, or synthetic based on their source. Dec 2, 2014 · This document presents a summary of a student group's presentation on polymer classification. Presenting our Amine Polymers Ppt Presentation Cpp PowerPoint template design. Hydrogen bonding, electrostatic interactions and van der Waals are believed important than “weaker This Module begins with an overview of some polymers concepts and refers to illustrations in the PowerPoint presentation. They include plastics, rubbers,thermoplastic elastomers, adhesives, foams, paintsand sealants. Medraj MECH 221 Lecture 21/2 Crystallinity in Polymers • Although it may at first seem surprising, polymers can form crystal structures (all we need is a repeating unit, which can be based on molecular chains rather than individual atoms) Chapter 14/15-Polyethylenes HDPE LDPE Density g/cm3 0. potx file. Polymers and polymerizations. Common Functionalization Approaches 29 Functionalization Case Studies: Biomaterials Systems, Liquid Crystal (LC) Polymers Less Traditional Approaches to Polymer Synthesis: 30 Surface Functionalization of Polymers, Graft Copolymerization Apr 15, 2021 · Polymers can be thermoplastics, which soften when heated and harden when cooled, allowing reshaping, or thermosets, which remain rigid. zyesk fjsadq xsjaso hfu tzjkkbne zwqh zojs vca off yize
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