Addition Polymers Flashcards

All 6 cards in this deck

What is the equation for the formation of poly(ethene) from ethene?

$n\,\mathrm{CH_2{=}CH_2} \rightarrow -(\mathrm{CH_2-CH_2})_n-$

What are the steps to draw the repeating unit of an addition polymer from its monomer?
e.g. propene, $\mathrm{CH_2{=}CH-CH_3}$

1. Change the C=C to a single C–C bond.
2. Draw a continuation bond out of each end carbon.
3. Keep all the other atoms/groups where they are: $-\mathrm{CH_2-CH(CH_3)}-$

What are the steps to deduce the monomer from the repeating unit of an addition polymer?
e.g. repeating unit $-\mathrm{CH_2-CHCl}-$

1. Remove the two continuation bonds.
2. Change the C–C single bond between them to a C=C double bond.
3. Leave all other atoms unchanged: monomer is $\mathrm{CH_2{=}CHCl}$ (chloroethene)

Give one property of poly(ethene) that makes it suitable for making containers and bags.

It is inert/unreactive and waterproof, and can be moulded into shape without breaking.

Which properties of PTFE (poly(tetrafluoroethene)) make it suitable for coating non-stick pans?

It is very unreactive, heat resistant and has a slippery, non-stick surface.

True or false? PVC is used to coat electrical wires because it conducts electricity.

False. PVC is used because it is a tough, flexible electrical insulator.