soluble synthetic polymer (Maciborski‚ and Salamone)‚ while Borax is a natural mineral with many household uses. It can be used as herbicide‚ to bleach teeth‚ as a household cleaner‚ and a laundry booster‚ to name a few (Helmenstine). Figure 1: chemical diagrams of PVA(Adkins) and Borax (Lee)‚ respectively The two combine to form a slimy eco-friendly substance due to the crosslinking between polymer chains (“Nuffield Foundation”) Polymers are composed of
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applications Hear the latest regulatory‚ environmental‚ and testing findings Intensive Short Course Selection‚ Evaluation‚ and Commercial Application of Flame Retardant Polymers Sunday‚ May 20‚ 2012‚ 8:30 a.m.–5:30 p.m. Course Director: Charles Wilkie‚ Marquette University The Course Instructors Edward D. Weil‚ Professor‚ Polymer Research Institute‚ Polytechnic Institute of NYU‚ Brooklyn‚ NY Sergei
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Bull. Mater. Sci.‚ Vol. 25‚ No. 6‚ November 2002‚ pp. 527–531. © Indian Academy of Sciences. Studies of properties of rubber wood with impregnation of polymer RASHMI R DEVI and T K MAJI* Department of Chemical Sciences‚ Tezpur University‚ Tezpur 784 028‚ India Abstract. Impregnation of rubber wood has been carried out under different conditions by using styrene as grafting monomer and glycidyl methacrylate (GMA) as crosslinker. Properties such as dimensional stability‚ water absorption‚ hardness
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Materials Final Review (TESTS I‚ II‚ & III) Part I : Multiple Choice 1) As the temperature of a polymer increases‚ its density a. Increases b. Decreases c. Remains fairly constant 2) Which one of the three polymer types does not involve cross-linking: a. Elastomers b. Thermoplastics c. Thermosets 3) Degree of polymerization is which of the following: a. Average number of mers in the molecule chain b. Proportion of the monomer that has been polymerized c. Sum of the molecule weights of the
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Street East Kew VIC 3102 Tel: (03) 9859 3344 Fax: (03) 9859 3411 Copyright © Environment Australia 2002 CONTENTS EXECUTIVE SUMMARY 1 2 INTRODUCTION TO BIODEGRADABLE PLASTICS ........................................1 BIODEGRADABLE STARCH-BASED POLYMERS ..........................................3 2.1 Thermoplastic Starch Products 2.2 Starch Synthetic Aliphatic Polyester Blends 2.3 Starch and PBS/PBSA Polyester Blends 2.4 Starch-PVOH Blends 3 4 5 6 3 BIODEGRADABLE POLYESTERS .............
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their useful material properties and low production costs. Almost every product is constituted of some kind of polymer; however‚ traditional synthetic polymers (often called plastics)‚ such as polypropylene and polyethylene‚ are derived from non-renewable petrochemicals and are not readily biodegradable (http://www.plastice.org/ fileadmin/files/Brochure_teachers.pdf). The need for polymers and the products they constitute is ever increasing; however the use of non-renewable fossil fuels for plastic
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development and applications of new organic/inorganic hybrid materials. Polymer-inorganic nanocomposite present an interesting approach to improve the separation properties of polymer material because they possess properties of both organic and inorganic such as good permeability‚ selectivity‚ mechanical strength‚ and thermal and chemical stability. Composite material derived by combining the sol–gel approach and organic polymers synthesis of hybrid material were the focus area of review It has
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What is plastic?? A material that contains one or more organic polymers of large molecular weight‚ solid in its finished state and at some state while manufacturing or processing into finished articles‚ can be shaped by its flow. Types of plastics 1.Thermosets. 2.Elastomers. 3.Thermoplastics. NATURAL RESINS solids or semi solid materials light yellow to darkbrown in colour carbon‚ hydrogen and oxygen. globules on the bark . SYNTHETIC RESINS derived primarily from petroleum
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Chemistry Name: Chun Ka Yuen (52180145) Group: C Date of experiment: 30/3/2012 Date of report: 3/4/2012 Experiment 5: Polymers Aim: This experiment is to prepare polymeric materials including polystyrene‚ Nylon6‚ 10‚ and cellulose triacetate. Introduction: A polymer consists of repeating subunits in the form of –A-A-A-A-A- or A-B-A-B-A-B-‚ where A and B are different subunits. These sub-units are typically connected by covalent chemical
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Sean Byrne Teacher Biology Honors 13 August 2014 Unit 1 Chapter 3 1) a. Monomers are small‚ simple molecules that when put together create carbon compounds‚ and polymers are molecules that consist of repeated units. b. Functional groups are made of clusters of atoms‚ while macromolecules are large polymers. c. A monosaccharide is a simple sugar‚ but a disaccharide is known as a double sugar‚ or two monosaccharaides. d. Long chains of amino acids are called polypeptides‚ and proteins are composed
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