Flashcards in Addition Polymers Deck (7)
- Polymers are large molecules formed from many repeat units of smaller molecules known as monomers.
- Unsaturated alkene molecules undergo addition polymerisation to produce long saturated chains w/ no double bonds.
- Addition polymers have high molecular masses.
- Synthetic polymers are named after the monomers that reacts to form it.
- Repeat unit from alkene has no double bond.
Biodegradability of polymers
- Polymers are readily available and cheap to process.
- Polymers are v unreactive which can be useful e.g storing food.
- But as they are not reactive, they are difficult to dispose.
- Recycling conserves finite fossil fuels as well as decreases the amount of waste going to landfills.
- Discarded polymers are sorted by type. If polymers are mixed, it makes product unusable.
Using waste polymers as fuel
- Some polymers are difficult to recycle.
- Waste products can be burned, which generates heat t hat can be used to generate electricity.
- Steam produced by heating can drive turbine producing electricity.
Removing toxic waste products to recycle
- Disposal of some polymers is dangerous e.g PVC because they make toxic products when burnt e.g HCl.
- New technology uses solvents to dissolve the polymer.
- High-grade PVC is then recovered by precipitation from solvent and the solvent is used again.
- Feedstock recycling is the chemical and thermal process that can reclaim monomers, gases or oils from waste products.
- These materials can be used as raw materials.