Chemical formulae + Polymers Flashcards
Di
two
Mono
One
Tri
Three
1 sulfur atom and 3 oxygen atoms
Sulfur trioxide
1 carbon atom and 1 oxygen atom
Carbon Monoxide
What is a polymer
Substance which has long molecules and identical groups of atoms repeated called monomers
Polymer molecules are usually… what does this mean
big and heavy, this means they melt at higher temperatures
What are the two types of polymers
Natural and Synthetic
Why is wool useful and is it natural or synthetic
Wool fibres trap air meaning the wool traps heat. natural
Why is rubber useful and is it natural or synthetic
Rubber molecules are long and bendy so they can slide over each other. It is flexible, waterproof and bendy Natural
What are natural polymers
Plants and animals make them
What are synthetic polymers (3 points)
They do not occur naturally. They are manmade. Each polymer has its own properties
Synthetic polymers are also known as …
Plastics
LDPE (Low density poly(ethene)
the molecules can slide over each other which makes it flexible, but it
is also strong
High density poly(ethene) (HDPE)
strong and flexible, it is harder than LDPE. Its surfaces can be
very smooth
