The global market for medical polymers is expected to reach USD 17.05 billion by 2020‚ according to a new study by Grand View Research‚ Inc. Increasing substitution of conventional materials such as glass and metals in medical devices by high performance polymers such as PVC and polypropylene coupled with growing demand for medical devices from the fast developing Asian healthcare market is expected to drive medical polymer demand over the next six years. In addition‚ growing geriatric population
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Chemistry 26/03/2013 The polymer Introduction What is polymer? Polymer is a huge macromolecule comprise many thousands of small molecules created through Joining together chemically. Polymers are everywhere in our life. Many industries extremely rely on polymers‚ for example‚ food court‚ tons o ’toys and dollar dungeon. Those all are stuff made out of polymers. In addition there are lots kind of polymers ‚ such as aramid‚ Carbon fiber‚ Rayon and so on. Now‚ this Essay will investigate Tons
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MANAGEMENT – 1 CHAPTER -1 INTRODUCTION TO MANAGEMENT AND ORGANIZATIONS 1 | What is management ? | (June-2011) | 2 | What is classical approach to management ? Describe the contribution of F.W.Taylor in the development of scientific management. | (Nov/Dec-2011) | 3 | Define management. | (Dec-2010) | 4 | Explain “ Management is a Science as well as an Art ”. | (Dec-2010) | 5 | “ Management is not people; it is an activity like walking‚ reading‚ swimming or running. People who
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POLYMER COCNCRETE 1. Introduction Despite being thought of as a modern material‚ concrete has been in use for hundreds of years. The word concrete comes from the Latin concretus‚ which means “mixed together” or compounded. Concrete is an extremely popular structural material due to its low cost and easy fabrication. Concrete is made up of sand or stone‚ known as aggregate‚ combined with cement paste to bind it. Aggregate can be of various sizes. It is broadly categorized as fine (commonly
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eXPRESS Polymer Letters Vol.3‚ No.6 (2009) 366–375 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2009.46 Starch-based completely biodegradable polymer materials D. R. Lu‚ C. M. Xiao*‚ S. J. Xu College of Material Science and Engineering of Huaqiao University‚ Quanzhou‚ 362021‚ P. R. China Received 21 February 2009; accepted in revised form 30 March 2009 Abstract. Starch is a natural polymer which possesses many unique properties and some shortcoming simultaneously
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the last decade as materials of choice in varied biomedical applications. This is associated with the inherent biocompatible nature of the hydrogels. The modulation of the properties of the hydrogels is easily possible due to the availability of polymers of varied chemistry and physical properties. This review discusses the pharmaceutical aspects of the controlled release of bioactive agents from hydrogel based formulations. 1. Introduction A gel may be defined as a 3-dimensional matrix of a solid
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Farbenindustrie Germany‚ by the reaction of a polyester diol with a diisocyanate‚ opened a new way in macromolecular chemistry: that is the synthesis of polymers by a new reaction‚ called polyaddition reaction. Polyurethane (PUR and PU) is any polymer composed of a chain of organic units joined by carbamate (urethane) links. Polyurethane polymers are formed through step-growth polymerization‚ by reacting a monomer (with at least two isocyanate functional groups) with another monomer (with at least
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styles for a short period of time. Using a pump or aerosol spray nozzle it sprays evenly over the hair. Hairspray was first developed and manufactured in 1948 by Chase Products Company‚ based in Broadview‚ Illinois.Its active ingredient is a suitable polymer or the chemical elastesse. Elastesse is a form of liquid elastic that keeps the hair stiff and firm without snapping. Pytocalcious‚ an ingredient in hair spray‚ lowers the amount of minerals in the hair’s root causing the hair to become stiff‚ or
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becomes viscous and is then transferred to the main reactor and is placed in a thermostat maintained at a higher temperature. After a known period of time the content is poured into methanol when the polymer gets precipitated out. It can be extracted into rods or fabricated into sheets. The polymer product being free from any contaminations except the monomer can be used without further purification. BP is mainly used for the manufacture of condensation reaction where the reactions are mildly exothermic
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of energy in your body. Monomers is smaller than a polymer. For carbohydrate the monomer is sugar and the polymer is a polysaccharides. Carbohydrates are important to our body because we need to use energy. The purpose of this lab is to figure which one is the monomer and which one is the polymer. Hypothesis: If I place two drops of iodine into the mystery powder‚ it would turn from brown to black ONLY if it was a polymer‚ if it’s not a polymer nothing would happen to the iodine‚ it would stay
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