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- Addition polymers are formed from alkenes which are monomers
- Polymerisation frequently uses high pressure heat and a catalyst
- The double bond open out to link all monomers together with single bonds
- The electrons in the pi bonds form new sigma bonds
- They go from unsaturated monomers to saturated polymers
Problems with polmers?
- They have non-polar bonds or strong bonds making them unreactive so they are not biodegradable
- Burning them gives off toxic gasses.