DF.7 Flashcards
Addition polymerisation
What is a polymer?
A polymer is a long molecule made up from lots of small repeating units of molecules known as monomers.
What is polymerization?
The process of monomers joining together to produce long chain polymer.
What type of monomers are usually used in addition polymerization?
Monomers that contain carbon carbon double bonds, like alkenes.
What is the prefix used to indicate a polymer?
poly-
What is it called when a few monomers incorporate together to form the final polymer?
Copolymerization.
How are the chains arranged in an amorphous polymer?
No pattern in the chain, with random intermolecular forces.
How are the chains arranged in a crystalline polymer?
A regular arrangement of chain and regular intermolecular forces.
What is LDPE?
Low density polyethene.
What is HDPE?
High density polyethene.
In copolymerization, are the arrangements of the different monomers random or repeating?
They are random, monomers can also be at different ratios.
