C1: Making polymers and designer polymers Flashcards
Which type of hydrocarbon turns bromine water colourless?
Alkene
What compound is does bromine and alkene form?
Di-bromo compound
Explain additional polymerisation.
Unsaturated monomers react together to form a saturated polymer molecular.
How is Gore-Tex breathable?
The holes in PTFE are too small for water to get in but small enough for water vapour to go out.
How do industry overcome PTFE being fragile?
It is laminated with nylon.
Why is research for polymers so imperative?
There are a lot of environmental and economic issues associated with the use of existing polymers.
State all the issues associated polymers.
Disposing polymers means landfill sites get filled quickly .
Landfill means wasting land which can be used for other purposes e.g. growing crops.
Disposal by burning makes toxic gases.
Disposing be burning or landfill sites wastes the crude oil used to make the plastics.
Difficult to sort them out so recycling is difficult
Atoms in polymers are bonded by ……………
Covalent bonds
Give the properties of plastics if they have weak intermolecular bonds.
Low melting point and can be stretched easily.
Give a few properties of strong polymers.
High melting points.
Have cross links and are rigid cant be stretched.
Explain what happens in the bromine water reaction.
A new compound is formed by an addition reaction which is a di-bromine compound
