The simplest definition of a polymer is a useful chemical made of many repeating units. One of the great design strengths of composites is the multiple. Polymer waste is a serious burden for the environment because common organisms. Secondly, it is the rheological properties that govern the flow behaviour of polymers when they are processed in the mol. Growth opportunity and demand analysis, market forecast, 20172025 the gcc polymer industry in 2016 was estimated to grow by 5% and reached to 27.
Find powerpoint presentations and slides using the power of, find free presentations research about properties of polymers ppt. Mechanical behavior of polymers iowa state university. Thermosetting polymers become permanently hard at elevated temperatures and pressures. From the solubility point of view, pharmaceutical polymers can be classi. The structure and properties of polymers slideshare. Technical whitepaper dielectric properties of polymers. The dielectric properties of polymers are largely predictable from the chemical structure of the polymer. The properties of polymers depend on their size, shape and three dimensional structure process by which the monomer molecules are linked to form a polymer molecule is called. These polymers are found in nature, example plants and animals. Laurencin1,2,3 1department of orthopaedic surgery, new england musculoskeletal institute, university of connecticut health center, farmington, connecticut 06030 2institute of regenerative engineering, university of connecticut health center, farmington, connecticut 06030. Failure of polymers in certain applications to carry design loads or occasional accidental overloads may be due to excessive plastic deformation resulting from the inadequate strength properties of the polymer. Examples are proteins, cellulose, starch, resins and rubber. Thermal properties of polymers polymer engineering dr. Medraj mech 221 lecture 2114 viscoelasticity if you make a ball of a silly putty, and set it on plate, it flattens out by.
Crystallinity increases the barrier properties of a polymer packaging. Qatar was recorded as the fastest growing consumer of polymers in the region which is growing at a rate of 14% annually. Mechanical properties of polymers concordia university. If you continue browsing the site, you agree to the use of cookies on this website. Polyester coathere is an example of a polymer you may have. Polymer properties and characterization authorstream. Viscoelastic behavior reflects the combined viscous and elastic responses, under mechanical stress of.
Prabhu contents heat capacity thermal conductivity thermal expansion glass transition temperature factors affecting tg heat capacity a solid materials potential energy is stored as its heat energy. With increase in crystallinity, the optical properties of a polymer are changed. Dotfaaar0411 office of aviation research washington, d. Ppt polymers powerpoint presentation free to download id. Polymers are composed of nonmetallic elements, found at the upper right corner of the periodic table. These species grow naturally in the semiarid subsaharan regions of africa. An understanding of polymer crystallinity is important because the. Dna carbohydrates 4 4 4 6 6 7 9 10 10 10 10 10 19 synthetic and biological polymers polymers. Mechanicalpropertiesof polymers harvard university.
All these techniques affect the optical properties of polymers. Macromolecules formed by the covalent attachment of a set of small molecules termed monomers. Physical properties of polymers authorstream presentation. Microsoft powerpoint lecture 21 polymers 3students 2017. Properties of polymers the glass transition temperature tacticity molecular weight 32 v. There are over species of acacia and a summary of their botanical classification was reported by phillips and williams, 1993.
Find materials for this course in the pages linked along the left. Physical structure of polymers, small vs large molecules, molecular features, some physical technique for studying polymers, molecular sizes and shapes and ordered structures, polymer blends and copolymers, polymer blends and copolymers, regular chains and crystallinity, morphology and motion, morphology morphology and motion. Polymers and their properties introduction basic topics. The structure and properties of polymers slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A primary reason that polymer properties are different is because the chemical compositions of metals, polymers and ceramics are totally different. Another approach to thermodynamics of polymer solutions 165 2. Mixing behavior in general, polymeric mixtures are far less miscible than mixtures of small molecule materials. Thermal analysis is the ideal technique for determining material properties and transitions and for characterizing polymeric materials. They slowly disappear from the site of administration in response to a chemical reaction such as hydrolysis. The ductility of thermoplastic polymers is reduced upon cooling 5.
Ga sources and processing acacia senegal and acacia seyal trees are the main sources of ga. Introduction to materials science, chapter 15, polymer structures university tennessee, dept. Here youll learn the definition and properties of polymers, another name for plastics. Material progressively releasing dissolved or dispersed drug, with.
The chemical structure determines the polar or nonpolar nature of the final polymer and this then largely determines the behavior of the polymer under a variety of electrical situations. Colligative properties in nonideal solutions 164 2. The glass transition temperature 33 the glass transition temperature is the temperature at which an amorphous solid becomes soft upon heating or brittle upon cooling. Polymer structures and properties is the property of its rightful owner. This handbook focuses on applications of thermal analysis techniques in the field of polymers.
Introduction to materials science, chapter 15, polymers. Biopolymers can be complex and nice introduction to materials science, chapter 15, polymer structures university tennessee, dept. Polymers mechanical properties all polymer mechanical properties are time and temperature dependent deformation evolves through chain unfolding and sliding. Monomers are long chains of covalently bonded carbon atoms the monomer units can be linked together to generate linear polymers, branched polymers or cross linked polymers. Every polymer has its own characteristics, but most polymers have the following general properties polymers can be very resistant to chemicals polymers can be both thermal and electrical insulators generally, polymers are light in weight with varying degrees of strength polymers can be processed in various ways to produce thin fibers or. Optical characterization and properties of polymeric. Scribd is the worlds largest social reading and publishing site. Crystalline and amorphous polymers polymer strength and stiffness increases with crystallinity.
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. Some of these are discussedherewithinthefollowingsections. Mechanicalpropertiesof polymers kamyardavoudi october,20 materialsscienceseminar. Biodegradable polymers are defined as polymers comprised of monomers linked to one another through functional groups and have unstable links in the backbone. Their versatility makes them suitable for a whole range of applications, and comes from the capability of manufacturers to tailor microstructures and therefore properties through control of the processing conditions. Polymers are made of chains of repeating compounds. Topic 7 optical properties of polymers part 1 youtube. Ppt polymers powerpoint presentation free to download. The adobe flash plugin is needed to view this content. Basim abujdayil 1 polymer glass transition have you ever left a.
Mechanical properties of polymers are much dependent on time dr. If so, share your ppt presentation slides online with. Types of polymers classification of polymers characteristics of polymers properties of polymers streng slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Heat capacity is a measure of the ability of the material to absorb thermal energy. Polymers that exhibit extreme elastic extensibility when subjected to relatively low mechanical stress also known as rubber some elastomers can be stretched by a factor of 10 and yet completely recover to their original shape although their properties are quite different from thermosets, they share a similar molecular structure. Dotfaaar0411 firesafe polymers and polymer composites. Biomedical applications of biodegradable polymers bret d. Thermal properties of polymers free download as powerpoint presentation. A polymer can be a three dimensional network think of the repeating units. If youre after basic information on plastic materials, this is the place to find it. Correlation function of a gaussian chain 166 3 dynamics of dilute polymer solutions 167 3.
The polymers obtained by simple chemical treatment of natural polymers to change their physical properties like starch, silicones 3. Polymer properties and characterisation slideshare. The structure and properties of polymers the structure and properties of polymers by. Lecture notes polymer physics materials science and. Introduction to materials science chapter 19, thermal properties 3. View and download powerpoint presentations on properties of polymers ppt.