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Presentation transcript:

mmcl2003

* Information available

mmcl2003 What is a polymer? Large molecules (macromolecules) formed by many small molecules called monomers joining together answer 1.

mmcl2003 SYNTHETIC means …..? Man-made ( by the chemical industry ) answer 2.

mmcl2003 Give some examples of natural polymers Rubber Silk Wool Starch Cellulose answer 3.

mmcl2003 Give some examples of synthetic polymers Nylon Polythene Polystyrene PVC Perspex answer 4.

mmcl2003 Give examples of thermosetting polymers Bakelite Formica answer 5.

mmcl2003 From which RAW MATERIAL do we obtain the chemicals used to make most plastics and synthetic fibres? CRUDE OIL* answer 6.

mmcl2003 What type of hydrocarbons are the monomers for addition polymers? ALKENES* answer 7.

mmcl2003 How are addition polymers formed? The C = C in the monomers open and the monomers join together answer 8.

mmcl2003 How are polymers named? The word ‘poly’ goes in front of the monomer name answer 9.

mmcl2003 How are the small unsaturated molecules used to make polymers produced? CRACKING* answer 10.

mmcl2003 How are the small unsaturated molecules used to make addition polymers obtained from crude oil? Fractional distillation answer followed by Catalytic cracking 11.

mmcl2003 What is addition polymerisation? answer The type of reaction where monomers with C=C double bonds join to form polymers through a process which involves the breaking of the double bond 12.

mmcl2003 What is POLYMERISATION? answer The type of reaction in which many small molecules join together to form polymers 13.

mmcl2003 Given the addition polymer how would you draw the monomer? 1. Find the repeating unit 2. Redraw with a C = C answer 14.

mmcl2003 What is a THERMOPLASTIC polymer ? A thermoplastic polymer is one which softens on heating and can be reshaped answer 15.

mmcl2003 Give some advantages of synthetic polymers Cheap, light weight, long lasting (durable/hard-wearing), insulators answer 16.

mmcl2003 Give some examples of how the PROPERTIES of plastics are related to their USES PVC  Non-conductor of electricity, flexible  insulating electrical cables Polystyrene  Non-conductor of heat, light  drinks cups answer 17.

mmcl2003 What danger is associated with burning plastics? Toxic gases can be produced answer 18.

mmcl2003 BIODEGRADABLE means ………. Decomposed (rots) naturally by living matter answer 19.

mmcl2003 Name 3 toxic gases that could be given off by a burning plastic Carbon monoxide (from almost any plastic) Hydrogen chloride (from PVC) Hydrogen cyanide (from polyurethane) answer 20.

mmcl2003 What are the typical REACTION CONDITIONS for an addition polymerisation reaction? High temperature High pressure Catalyst answer 21.

mmcl2003 Draw part of a poly(ethene) molecule showing 3 ethene monomers joined together answer HHHHHH HHHHHH CCCCCC 22.

mmcl2003 Draw part of a poly(propene) molecule showing 3 propene monomers joined together answer CH 3 H HHHHHH CCCCCC H H 23.

mmcl2003 Draw the repeating unit for answer CH 3 H HH CC POLYPROPENE* 24.

mmcl2003 Give some disadvantages of synthetic fibres? Don’t feel or look as good, finite, non-biodegradable (won’t rot), burn to give toxic fumes answer 25.

mmcl2003 Recycling The type of plastic is indicated by a code as shown opposite

mmcl2003 A hydrocarbon with a carbon to carbon double bond ALKENE

mmcl2003 Breaking up long chain hydrocarbons to give smaller ones some of which have carbon to carbon double bonds CRACKING

mmcl2003 POLYPROPENE CH 3 H HHHHHH CCCCCC H H

mmcl2003 FOSSIL FUEL CRUDE OIL Mixture of hydrocarbons