t/year Advisor: Prof. Dr. Ing. Ec. L.M. Butac July 2014 Student: Moise Camelia Mihaela LITERATURE REVIEW............................................................................................................. 2 I.i. History of styrenic polymers ............................................................................................................... 2 I.ii. Polystyrene. Introduction and History .......................................................................................
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IMSE 3001 Computer Integrated Manufacturing Coursework No. 1 Background: Recently‚ our company strategy has been reviewed and new management policies are introduced to cope with the recent technology development and future market trend. Workflow in the e-commerce environment: Under the new management policies‚ an e-commerce system will be established. IDEF0 Diagrams for illustrating the respective workflow in the e-commerce environment are shown as follows: Figure 1: Node A-0
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Product Name Hold Hairspray. Product description Hold is a quality hairspray available in four fruity scents – grape‚ strawberry‚ blueberry and apple. The delicious scents stay in hair for up to six hours. It comes in a 500 mL bottle for the affordable price of $7.99. Hold comes in an attractive‚ bright bottle that will stand out from the other dull bottles on the shelf. It promotes shiny and healthy hair through added conditioning agents. It is easy to brush out and will provide an all day flexible
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Like all other plastics‚ water bottles have an immense relevance to society‚ but you never see what lies within them. Bisphenol A‚ also known as BPA‚ is an enormous branch in the making of plastics‚ but most importantly‚ water bottles. It is used significantly in lacquers/paints‚ filling-in materials‚ and for binding certain materials. BPA is mostly used for the making of polycarbonate resins (71%) and epoxy resins (27%). Not to mention‚ it is used as an add-on for thermal papers‚ brake fluids‚ and
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INTRODUCTION 1. INTRODUCTION The copolymerization of ethylene with 1‚ 3-butadiene to give crystalline‚ homopolymer-free‚ high molecular weight‚ substantially linear copolymer is described. Butadiene polymerizes almost exclusively in a trans-1‚ 4 structure‚ ranging in content from zero to 50 mole-%. At relatively low content of butadiene monomeric units (≤30 mole-%) X-ray crystallinity is of polyethylene type with a slight variation of the structural parameters. At higher levels of
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brand name for a group of biopolymers often called PHAs or PHBs. The continual use of petroleum to make polymers for plastic will eventually run out and hence Biopol was introduced as a polymer replacement for petroleum. It is made from an organic substance known as Alcaligenes eutrophus which is a microorganism. Biopol is stable when stored in air and even humid conditions. When the polymer is exposed to microorganisms found in soil‚ sewage‚ river bottoms or other similar environments‚ the decomposition
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Polymer Chemistry 2011 Bulk polymerization of styrene with AIBN Step one: Preparation of the monomer. Remove inhibitors from styrene by passing it through a mini-column packed with basic alumina: place a small glass wool plug in the bottom of a Pasteur pipette and fill it one-half full with alumina. Place the mini-column in a hood and add styrene drop wise to the top of pipette. It takes about 4 minutes to elute 2 mL of styrene. If it takes much longer than 4 minutes‚ the styrene may be contaminated
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Organometallics‚ 2004‚ 104. Supporting experiments: Brintzinger et al.‚ Angew. Chem.‚ Int. Ed.‚ 1990‚ 1412 (Zr)‚ Piers and Bercaw‚ J. Am. Chem. Soc.‚ 1990‚ 9406. 1 Chain Termination: β-Hydrogen Transfer - H- transferred from the growing polymer chain to an incoming olefin. This is the dominant chain termination mechanism under the usual experimental conditions. Ziegler et al.‚ J. Am. Chem. Soc.‚ 1999‚ 154. H [M] C H2 H2 C H P C H2 [M] H H P C H2 [M] H H P P [M] H [M] H H H β-Hydrogen
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Simulation of the Coiling of a polymer strand Tsvetoslav Pavlov Department of Materials‚ Imperial College London‚ United Kingdom 27th Feb 2012 1. Abstract This study will examine the temperature dependence of internal energy‚ heat capacity and R2 value (representative of the end to end distance) using a Langevin Dynamics simulation. It will also consider the dependence of the internal energy‚ heat capacity and R2 value with increasing polymer chain length. Internal energy has been found
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SMART MATERIALS 1. Introduction The primary characteristic of a ‘‘smart material’’ is that it has the ability to respond to external stimuli in a technically useful and technically controlled way. The words ‘‘technically useful’’ and ‘‘technically controlled’’ are emphasized since all materials respond to external stimuli of some sort or other (as a simple example‚ all materials respond to temperature by changing their volume)‚ however‚ to be considered a ‘‘smart material’’ the response must
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