Polymers Draw the structure of a polymer Match

Polymers * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

What are polymers? * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

What do we make polymers from? * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

What are the different types of polymer? * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

• http: //bpes. bp. com/secondaryresources/science/ages-14 -to-16/chemical-andmaterial-behaviour/polymerisation/ * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Polymers (Greek) poly = “many” meros = “part” Each polymer molecule is made from a repeating unit: a monomer Monomers are small molecules (not single atoms). polymerisation monomers * Draw the structure of a polymer Single polymer chain ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Size and shape matter Polymer chains are like long bits of string. The polymer’s properties depend on many factors: • length of chains • type of monomer(s) • side-links and branches • temperature • time taken for polymer to cool down • other chemicals present * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Arrangement of the chains The length of the chain can be controlled. The chains are thousands or millions of units long. DNA: a very complex polymer up to 220 million units long. * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Chain length They twist and bend and tangle with each other, but can also line up neatly. Chains entangled (amorphous) * Draw the structure of a polymer Chains aligned (crystalline) ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Branching and cross-linking Sometimes they can have branches, or they can be linked to other chains. Different types of branching * Draw the structure of a polymer Cross-linked chains ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

• Which of the following molecules could be used as monomers? Explain your answer. A B * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics C *** Explain how polymerisation works using a diagram and showing the bonds

• • The solid lines represent covalent bonds. A thermosoftening plastic: A thermosetting plastic: Note: • Polyethene is a thermoplastic. • Bakelite is a thermosetting plastic. Use the diagrams to explain the following observations. • Polyethene is flexible • Bakelite is rigid • Polyethene melts when heated. • Bakelite does not melt when heated Use Thermoplastic or thermosetting plastic? Ash tray Carrier bag Electric plug Packaging * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Making slime • PVA is a polymer • We add borax which forms the borate ion in solution * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

The chemistry of slime • What has happened to the PVA? • How has the structure changed? * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds

Polymers • Putting all the information you know together, make a double spread page about polymers. • Use connectives to improve the quality of writing and make your point. * Draw the structure of a polymer ** Match the types of plastic to their use – thermoset/thermoplastics *** Explain how polymerisation works using a diagram and showing the bonds