9.17-9.25 Polymers Flashcards
What is a polymer?
A substance of high average molecular mass made up of amll repeating units
What happens in addition Polymerisation?
.Many small molecules join together to make very large molecules
What can any Alkene be used as?
A monomer to create a polymer due to the carbon-carbon double bond
What is a monomer the same as?
The repeat unit
Give the properties of Polyethene
.Flexible
.Cheap
.Electrical insulator
Give the uses of Polyethene
.Plastic Bags
.Bottles
.Coating on electrical wires
Give the properties of Polypropene
.Flexible
.Strong
Give the uses of Polypropene
.Buckets
.Crates
Give the properties of Polychloroethene (PVC)
.Tough
.Cheap
.Long lasting
Give the uses of PVC
.Window Frames
Give the properties of PTFE
.Tough
.Non stick
Give the uses of PTFE
Non stick coating on pans
Why are polyesters condensation polymers?
.In condensation polymerisation a small molecule is formed as a by product
.This is an ester therefore a polyester is lots of these monomers
How is a polyester formed when a monomer molecule containing two carboxylic acid groups is reacted with a monomer molecule containing two alcohol groups?
.The dicarboxylic acid loses the OH group off each COOH group
.The di alcohol loses the H off each OH group
.The remaining molecules join together to make a polyester
How is a molecule of water formed each time an ester link is formed?
.The OH and H groups combine to make H2O
Give two advantages of recycling polymers
.Reuse waster materials-better for the environment than burning them or putting them in landfills
.Saves Crude oil (A finite resource)
.More economically viable instead of making more polymers
Give a disadvantage of recycling Polymers
.Difficult and expensive to first separate the different polymers
True or False? DNA is a polymer
True
How many different monomers is DNA made from/
4
What are the 4 monomers in DNA known as?
Nucleotides
What is starch?
A polymer based on sugars
What are proteins based on?
Polymers built on Amino Acids
