polymers. Flashcards
what do polymers consist of?
very large molecules.
what are plastics an example of?
(man made) synthetic polymers.
what are the atoms within the polymer molecules held together by?
strong covalent bonds.
what forces between large polymer molecules are quite strong?
intermolecular.
what state are polymers in at room temperature?
solid.
all plastics are …………but not all polymers are……………
polymers.
plastic.
define monomer.
molecule that can react with other monomer to form a polymer.
define polymer.
long chain of molecules made up of repeating units of monomers.
what is the shorthand formula?
n shows the polymer contains a very large number of the repeating unit shown in the brackets.
what are the properties of a LDPE?
branched.
less dense.
doesn’t stack.
more flexible.
lighter.
what are the properties of a HDPE?
very close (lines.)
straight line.
stackable.
high density.
lots of polymer chains.
what does LDPE stand for?
low density polyethene.
what does HDPE stand for?
high density polyethene.
what do thermosoftening plastic do when heated?
melt.
what do thermosetting plastic do when heated?
don’t melt.
