polymers. addition polymers condensation polymers

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  • POLYMERS

  • POLYMERSAddition polymersCondensation polymers

  • Some definitionsPolymerlong chain molecule made from lots of small molecules joined together

    Monomersmall molecules that join together in polymerisation

    Addition Polymerisationformation of long chain molecules from lots of small molecules joining together with no other product

    Condensation Polymerisationformation of long chain molecules from lots of small molecules joining together with a small molecule (e.g. water) released

  • http://users.argonet.co.uk/users/hoptonj/polymer.htmAddition polymers

  • Addition polymersnethenepoly(ethene)polythene

  • Addition polymersnphenylethenepoly(phenylethene)polystyrene

  • Addition polymersnmethyl 2-propenoate poly(methyl 2-propenoate )perspex

  • Addition polymersnmethyl 2-cyanopropenoate supergluepoly(methyl 2-cyanopropenoate)

  • Addition polymersnchloroethene PVCpoly(chloroethene)

  • Addition polymersntetrafluoroethene PTFE / Teflonpoly(tetrafluoroethene)

  • Addition polymersnpropene poly(propene)

  • Addition polymersCatalysts are used for the polymerisation, and the exact mechanism depends on the catalyst and alkene (it is not electrophilic addition it is usually catalytic addition).Polyalkenes are inert, although can burn.As they are inert, they are non-biodegradable.

  • Condensation polymersCondensation polymers are polymers formed from condensation reactions between monomers. A small molecule (often water) is produced as well as the polymer.Many natural polymers are condensation polymers, e.g. silk, starch and DNA.The two main types are polyesters and polyamides.

  • PolyestersEsters are formed on reaction between carboxylic acids and alcohols.Polyesters are formed when dicarboxylic acids react with diols.Polyesters are hydrolysed (in the presence of strong acid or a specific enzyme) into their constituent acid and alcohol, so they are bio-degradable .

  • Polyestersstrong acid or specific enzyme- H2O

  • Polyestersstrong acid or specific enzyme

  • PolyestersKevlar

  • PolyestersAmides are formed on reaction between carboxylic acids and amines.Polyamides are formed when dicarboxylic acids react with diamines.Polyamides are hydrolysed (in the presence of strong acid or a specific enzyme), so they are bio-degradable...

  • Polyamidesstrong acid or specific enzyme

  • Polyamidesstrong acid or specific enzyme

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