Topic 9- Part 3 (Polymers) Flashcards
What is the addition polymer called when made from ethene?
Polyethene/ Polythene
Made by adding heat to break double bond
What is a polymer?
-Large molecule made of many repeating, smaller units called monomers
-High molecular mass
-Made of small repeating units
How to draw polymers?
( the monomer ) n
What is the chloroethene polymer made of?
The monomer with CH3Cl is repeated
-Hydrogen, Carbon, Chlorine
(PVC glue)
What is polyethene used for?
-Flexible + Cheap + Thin films
-Plastc bags (low density)
-Plastc bottles ( high density)
What is polypropene used for?
-Flexible, strong, shatter resistent
-Food packaging, ropes, carpets
What is polychloroethene used for?
PVC
-Long lasting, tough, cheap
-Plastic sheets, artficial leathers,
Insulation for electrics, windows and pipes
What is polytetraflruoroethene used for?
PTFE
-Very tough, non-stick, resists high temp
-Non-stick coatings for pans, containers for lab substances
What is a polyester
chain of two different repeating molecules
condensation polymer (water is produced)
What forms a condensation polymer (polyester)
Dicarboxylic acid monomer (two carboxylic acid (-COOH)) + Diol monomer (two alcohol/ OH groups)
lose OH, looses H forms H2O
needs to lose another water set to join other monomers
What is needed for a condensation polymer to form?
-Two dia (two of the same function on each end)
-monomers with different function groups
Carboxylic acid group + Alcohol group
What else is formed in a condensation polymers creationn?
A molecule of water for every link formed
Are esters (condensation polymers) biodegradable?
Yes, bacteria breaks down thier links
What are the problems with polymers:
-Availability of starting materials
-Not biodegradable (fill landfill sights)
-Produce CO (Carbon monoxide) when combusted
-Recycling requires sorting and melting polymers —> energy + money
Example of natural polymers?
-DNA (4 diff monomers called nucleotides)
-Starch (sugar)
-Protiens (amino acids)
