BACKGROUND OF THE STUDY The idea of this study is to make a wood adhesive by the use of natural ingredients‚ specifically Rubber tree sap‚ Soybean‚ & Star Apple leaves mix with grind dried leaves. For there is an urgent need to new environmentally friendly wood adhesives that is due to the new regulations and environmental concerns regarding the emissions of formaldehyde and its carcinogenic vapour‚ and due to the limited amounts of petroleum sources. Moreover‚ we want to enhance the adhesive performance
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Background Theory. Polyethylene Polyethyene is a type of polymer that is used in our daily life. Polyethylene(abbreviated PE) is a thermoplastic polymer‚ meaning that is can be melted to a liquid state and remolded as it returns to a solid state. PE is chemically synthesized from ethylene‚ a compound that is usually made from petroleum or natural gas[1]. The main mechanical properties of PE are the ultimate tensile strength and the modulus of elasticity. There are different types of Polyethylene
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EXECUTIVE SUMMARY 0.1 0.1.1 GENERAL Nylon Tyre Cord: Nylon tyre cord is made from high tenacity continuous filament yarn by twisting and plying. There are two major types of nylons used as tyre cord‚ i.e. nylon-6 and nylon-6‚6. The properties of nylon-6 and nylon-6‚6 vary marginally and are controlled by the manufacturing process‚ type of stabilisers and additives used. In India only nylon-6 is produced commercially for tyre cord. Thetypesofnylon-6tyrecordusedinIndiaare840/2‚1260/2‚1260/3‚
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Introduction One of the most precise measurements in polymer science is also the simplest and cheapest. Intrinsic viscosity‚ which is measured from the flow time of a solution through a simple glass capillary‚ has considerable historical importance for establishing the very existence of polymer molecules. It also provides considerable physical insight. In this lab‚ each group will study the intrinsic viscosity of hydroxypropylcellulose‚ a common polymer derived from cellulose--hopefully at a different
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Natural selection allows for success. Naturally‚ our human instinct is to survive and become successful. How we accomplish that success is questionable. Is success granted in how far a person has gone in their career? Or is success granted in achieving high morality? Playing by the rules will not provide an individual a sense of high morality or make them more successful than those who bend the rules. Playing by the rules is synonymous with having high integrity. As a high school student‚ I am
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Investigating the Ratio Between Poly-Vinyl Alcohol and Sodium Borate to form a Bouncing Ball Timothy English Gen. Chem. 1 Lab Section: 009 Introduction: Poly-Vinyl Alcohol (PVA) is a water-soluble synthetic polymer that will be used as one element to form the well know bouncing ball‚ along with Sodium Borate (borax)‚ which has a variety of uses because of its weak base. PVA is ideal for this experiment because it is odorless‚ nontoxic‚ has high tensile strength and flexibility. The
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nano-filler show only minor improvement of about 17% in the modulus values. Young’s modulus in nano-composites does not undergo much change in the elongation to break values; this can be associated with the disappearance of plastic deformation of the polymer
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The characteristic properties of slime can be explained by polymerisation reactions. Polymers can be explained most simply by the polymerisation of the molecule ethylene into polyethylene (see figure 1 below). Figure 1. Polymerisation of polyethylene from ethylene. In this example‚ the double bond between the carbon atoms is broken‚ allowing each carbon atom to form one more bond between another molecule. The double bond between the carbon atoms is weaker because the type of orbital is ‚ compared
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241 3/19/12 Natural Killer Cells Despite their infuriated name‚ natural killer cells are literally a very important type of cell in the human body. Natural killer cells‚ also known as NK cells‚ are primarily a supportive type of cell which aids in protecting you from distinct infections and even cancer‚ as these cells target tumor cells.1 The natural killer cell plays a severe role in administering the innate and adaptive immune response to pathogens‚ injury‚ and stress. Natural killer cells acquired
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background information 2 – 4 Tensile Testing 5 - 7 Classification of Polymers 8 - 9 Summary of Classification of Polymers and Molecular Weight 10 Structure of the Materials Used in this Experiment 11 - 12 Experimental Procedures
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