1. Condensation polymers

2. Monomer x + Monomer y  Polymer + small molecule (normally water).
Distinguish between addition and condensation polymers in terms of their structures
An addition polymer is formed when double bonds are broken in the individual molecules and these rebond to another molecule so that long chains are formed. eg polythene
A condensation polymer is formed when molecules are joined together with the elimination of some other compound (usually water). examples are nylon and polyester
Monomer x + Monomer y  Polymer + small molecule (normally water). n

5. Describe how condensation polymers are formed from their monomers
*A monomer is the small molecule that makes up the polymer
Two monomers are joined by condensation polymerisation in a reaction involving the loss of a molecule, usually water

6. Describe and explain how the properties of polymers depend on their structural features
Kevlar—
an extremely strong material that derives its strength from its weave. It is woven like tiny spider webs
it is the premium choice for bulletproof vests
It’s has very good resistance to high temperatures, and maintains its strength and resilience down to -196°C

7. phenol-methanol plastics
Describe and explain how the properties of polymers depend on their structural features
phenol-methanol plastics
-benzene rings bonds in more than one position to form a 3-D cross-linked structure
High melting point (thermoset plastic)
thermoset plastic: these polymers, once formed, cannot be reshaped by heating

8. Describe ways of modifying the properties of polymers
Air in the manufacture of polyurethane foams
Doping polymer such as polyethyne I2 to increase conductivity
Blending of polyester fibers to make them dyeable and more comfortable

9. Discuss the advantages and disadvantages of the polymers use
durable,
easy to handle,
lightweight
Attractive
can be rigid and tough
withstand heat
Disadvantages
-hard to recycle,
-Hard to Decomposition

10. in the Building and Construction Industry
items such as pipes, valves, decorative elements and heavy-duty uses
the Use of Electronics
use plastic electrical connectors, switches, and receptacles.
Packaging
the product needs to be well protected