polymers Flashcards
What is the definition of density?
The mass per unit of volume
What is the effect of density on a product?
Effects the products weight
What is the definition of fusibility?
The ability to change into a liquid when heated to a certain temperature-melting point
What is the effect of fusibility on a product?
Product able to be a complex shape
What is the definition of conductivity?
The ability to conduct electrical current or heat
What is the effect of conductivity on a product?
Product able to conduct or insulate from heat or electricity
What is the definition of thermal expansion?
The amount that a material expands when heated
What is the effect of thermal expansion on a product?
Product able to be used in hot or cold places
What is the definition of strength?
The ability to withstand force without breaking or being permanently deformed
What is the effect of strength on a product?
Product able to support or withstand weight and force
What is the definition of elasticity?
The ability to bend and flex when subjected to a force, and then return to original form when force removed
What is the effect of elasticity on a product?
Provides comfort for user
What is the definition of plasticity?
The ability to be permanently changed in shape by the application of an external force without breaking or fracturing
What is the definition of malleability?
The ability to be changed permanently in shape by the application of a compressive force without breaking or fracturing
What is the definition of ductility?
The ability to be changed permanently in shape by the application of a tensile force without breaking or fracturing
What is the definition of hardness?
The ability to resist abrasive wear, indentation and deformation
What is the definition of toughness?
The ability to withstand sudden stress in the forms of shocks or blows without fracturing
What is the definition of durability?
The ability to withstand wear, tear and deterioration over time
What is the definition of stability?
The ability to resist changes in shape and size over time
What is the effect of plasticity on a product?
Sheet material can be formed into simple shapes
What is the effect of malleability on a product?
Product can be pressed into shape
What is the effect of ductility on a product?
Product can be made into wire or tubing
What is the effect of hardness on a product?
Product is scratch resistant
What is the effect of toughness on a product?
Product is impact resistant
What is the effect of durability?
Product maintains aesthetic for a long time
What is the effect of stability on a product?
Product will not warp or bend over time
What is a thermoplastic?
A polymer that, when heated, becomes a plastic; meaning they can be heated and reshaped repeatedly
What is a thermoset?
A polymer that, when heated, becomes hard: and once formed, undergoes a chemical reaction that makes them permanently rigid
What is an elastomer?
A polymer that deforms under a force, and then immediately returns to its original shape once the force is removed