Fichas
Addition polymers
Fichas del conjunto (13)
- 1What are polymers?Made up of smaller chains called monomers
- 2What are addition polymers?Made from alkenes
- 3What are plasticisers?Force themselves between the chains to move them apart to make them more slippery.
- 4What is the biodegradability of polymers?- Unreactive so they don't get attacked by biological agents (enzymes) so they're not biodegradable
- 5How are low density polymers made?- High pressure
- High temp
- Free radical mechanism - 6What makes low density polymers less dense?- More branched
- Less closely packed - 7What are low density polymers used for?- Plastic bags
- Sheeting
- Wire insulation - 8How are high density polymers made?- Normal temp and pressure
- Ziegler Natta catalyst - 9What makes high density polymers more dense?- Less branching
- More densely packed - 10What are high density polymers used for?- Milk crates
- Buckets
- Bottles - 11What is the process of mechanical recycling?- Separate plastics
- Wash
- Grounded up
- Melted and remoulded - 12What is the process of feedstock recycling?-Heated to break polymer bonds
-Remade into other things - 13Disadvantage of feedstock recycling?Can only be done a certain number of times as chain length decreases each time
Información
- Descripción
- AS level (Chapter 14 - Alkenes) Chemistry Fichas sobre Addition polymers, creado por Bethany Westwood el 16/02/2017.
- Creado por
- Bethany Westwood
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- 1
- Valoración