F322-Polymers Flashcards
How do alkenes join together to form polymers?
The pi-bond of the double bond of one molecule breaks and is uses to form a bond to another molecule.
How is an addition polymer formed?
When Alkene molecules join together to form long chain molecules (upto 10,000+ monomer units)
What is the section of polymer that the monomer forms called?
The repeat unit
What is the bond angle of trigonal planar?
120*
What is the bond angle of tetrahedral?
109.5*
What word is put in front of the name of an Alkene to represent a polymer?
Poly
Name a disadvantage of addition polymers?
They are non-biodegradable
Name a use of polyethene
Plastic bags
Name a use of polytetrafluoroethene(PTFE).
Teflon-non stick coating for pans
Name a use of polychloroethene(PVC)
Window frames
Biodegradable polymers
Break down naturally in the environment (using living organisms) into carbon dioxide and water
Name a solution to non-biodegradable polymers
Use as a fuel source
~burn the polymers under controlled conditions to produce heat energy
State a difficulty in the disposal of polymers
The process of pyrolysis releases harmful gases into the atmosphere
Why are alkenes able to undergo addition reactions?
Because they have a double bond
