1. History The invention of epoxy resin has undergone a long period of time. As early as 1891‚ the German Lindmann hydroquinone and epichlorohydrin with the reaction of condensation into the resin and make use of anhydride curing. But its value has not been revealed. Epoxy plastic has its roots far back in history‚ to be specific‚ in 1936‚ when Dr. Pierre Castan in Switzerland succeeded in synthesizing an epoxy resin that he hardened with pthalic acid anhydride. Dr. Castan’s work was licensed
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ESSAY Areas of Concern Strengths Areas of Improvement Recommendations Student’s feedback When you were taking your practicum‚ what were your strengths‚ areas of improvement and recommendations for your future practicum experience? For me my strength is that I easily learned all the tasks I should accomplish. Needs to be braver enough to tell all my concerns. Always think positively and work with a smile. Training institution What are the strengths‚ areas of improvement and recommendation
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Experiment 1: Mechanical Properties Part A: Tensile Strength DCHE/FT/1A/01 Group A Loh Jia Jun (1316717) 26 April 2013 MATERIALS IN PRACTICE
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blocks. However‚ with a greater emphasis on increasing the efficiency of the engine via weight reduction‚ manufacturers have began to look for alternative alloys that are lighter than cast iron and aluminum alloys‚ while retaining the necessary strength to withstand the forces of an engine. As of late‚ new manufacturing processes have been developed that have engendered two new alloys suitable for use in an engine block‚ magnesium alloy AMC-SC1 and compacted graphite cast iron (CGI). In this
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Materials 2013a)‚ Yield Strength = 250MPa (AZO Materials 2013a)‚ Tensile Strength= 400-550MPa (AZO Materials 2013a)‚ Ductility based on elongation=23%( AZO Materials 2013a)‚ and ductility based on area of reduction = 15% (AZO Materials 2013a). A published value on the modulus of resilience could not be located. The published values for the aluminium specimen are‚ Modulus of elasticity= 68.9GPa (ASM Incorporated n.d.)‚ Yield Strength= 276MPA (ASM Incorporated n.d.)‚ Tensile Strength= 310MPa (ASM Incorporated
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Definition: Muscular endurance is the ability of a muscle or group of muscles to sustain repeated contractions against a resistance for an extended period of time. he combination of strength and endurance results in muscular endurance - the ability to perform many repetitions against a given resistance for a prolonged period of time (1). It is a crucial element of fitness for athletes such as distance runners‚ swimmers‚ cyclists and rowers. It’s also important for success in many team sports like
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impact properties are important. The effect of unmodified and titanate treated nano-CaCO3 on the microstructure as well as on the mechanical‚ barrier‚ optical properties of PVC films‚ prepared by solution casting method were studied. The tensile strength and barrier properties of nano-CaCO3/PVC increase with increasing loading of CaCO3 nanoparticles due to increased interfacial contact area and enhanced interfacial adhesion between CaCO3 nanoparticles and PVC matrix. Titanate treated nano-CaCO3/PVC
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Class 1 Metallic bonding: Found in metals and alloys‚ 1‚ 2‚ or 3 valence electrons that are not bound to any particular atom in the solid. They drift throughout the entire metal. This results in a sea of electrons. These free electrons result in good electrical and heat conductivity. Coordination number is 8 or 12 (number of nearest neighbors). Ionic Bonding Found in compounds that are composed of both metallic and nonmetallic elements. Metallic element gives up valence electrons to the
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StrengthsQuest™ Assignment For this project you will be completing the StrengthsQuest exercise and then compiling the information and findings comparing your personal strengths with your current job. Completing the StrengthsQuest™ Assignment StrengthsQuest™ is a self-assessment tool that will provide you with valuable feedback on your strengths (you will use your findings for this assignment as well as for the NU300 Professional Development Plan). Completing the StrengthsQuest should take about 45 minutes
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operating at 120kPa. While at higher voltage levels‚ the advantages of high pressure GIS become dominant. But the more suitable design is below the low pressure GIS at a rate voltage of 72.5kV. A higher SF6 gas pressure will increase the dielectric strength. As a result‚ for a given voltage level the required conductor spacing is reduced‚ resulting at a more compact design. Due to the economical and functional reasons‚ high voltage switchgear with SF6 gas is commonly used. The replacement of SF6 with
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