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Unformatted text preview: Polyvinyl Chloride (PVC) and Teflon Vinyl chloride PVC Tetrafluoroethylene Teflon H Cl C C H H C C C C C C C C H H H H H H H H H Cl H Cl H Cl H Cl n C C F F F F C C C C C C C C F F F F F F F F F F F F F F F F n Table 1.1 Types of Additives Commonly Used in the Production of PVC Type of Additive Effect Plasticizer Softens the Material Heat stabilizer Increases resistance to thermal decomposition Ultraviolet absorber Prevents damage by sunlight Flame retardant Lowers flammability Biocide Prevents bacterial or fungal attack PHYSICAL QUANTITIES Physical properties such as height, volume, and temperature that can be measured are called physical physical physical physical quantities quantities quantities quantities. Both a number and a unit of defined size is required to describe physical quantity. 3 FUNDAMENTAL UNITS (Systeme International) All other units are derived from this system. Derived SI Units Quantity Definition of Quantity SI unit Area Length squared m 2 Volume Length cubed m 3 Density Mass per unit volume kg/m 3 Speed Distance traveled per unit time m/s Acceleration Speed changed per unit time m/s 2 Force Mass times acceleration of object kg * m/s 2 ( =newton, N) Pressure Force per unit area kg/(m 2 ) ( = pascal, Pa) Energy Force times distance traveled kg * m 2 /s 2 ( = joule, J) FYI.. FYI.. GENERAL STRATEGY FOR UNIT GENERAL STRATEGY FOR UNIT GENERAL STRATEGY FOR UNIT GENERAL STRATEGY FOR UNIT CONVERSIONS CONVERSIONS CONVERSIONS CONVERSIONS x Unity factor. x Rearrange to form: x Multiply numbers x Cancel units What you want What youve got Conversion Factors : Unity Factors  I Equivalent factors can be turned into conversion factors by dividing one side into the other! 1 mile = 5280 ft b 1 in = 2.54 cm b In converting one set of units to another, the one desired is on top in the conversion factor, and the old one is canceled out! Convert 29,141 feet into miles: Conversion Factors  II 1.61 km = 1 mi or 1 = 1.61 km mi Convert 5.519 miles in to kilometers: Conversions in the metric system are easy , as 1 km = 1000 m, 1 meter (m) = 100 centimeters(cm), and 1 cm = 10 millimeters(mm)...
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 Spring '10
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