Plastic and new materials Flashcards
what is a polymer
a very long molecule made by joining lots of smaller ones
what is a monomer
the small molecule used to make polymer
what is polymerisation
the process turning monomers into polymers
what is addition
a reaction involving CARBON TO CARBON DOUBLE BOND becoming a single bond
what is condensation
a reaction which involves 2 molecules joining to make a larger one, by eliminating a small molecule like water
what do they become after condensations
esters
what are some natural polymers
cotton linen wool silk starch cellulose
what are some synthetic polymers
polyester polypropene PVC silicon nylon poly(e)thene
where are most of the synthetic polymers from
crude oil
what is thermosoftening
if heated will get softer and can reshape it
what are some examples of thermosoftening
polythene
polypropene
what is thermosetting
if heated it cannot be move
what are examples of thermosetting
PTFE
urea-formaldehyde
examples of addition
polythene
polypropene
PVC
Latex
examples of condensation
nylon
urea-formaldehyde
starch
cellulose
