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POLYMERS Y9
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Why does the addition of cross links make it harder for the PVA polymer to move?
It will be harder for the polymer molecules to slide / move past each other
Predict one change in property of PVA glue when borax is added.
The PVA should become less runny / less flexible / more stretchy.
What solution is mixed with PVA glue to add cross links to the polymer?
Borax solution.
What common polymer-based material is used in the practical session?
PVA glue.
How do cross links change the polymer structure?
They add strong chemical bonds between the polymer molecules.
What are cross links defined as?
Strong chemical bonds between the long polymer molecules.
Definition of exothermic?
Reactions that transfer energy to the surroundings.
Name one major component that cellulose is a part of.
Wood, paper, cotton...
What molecule is released when glucose molecules are condensed to form cellulose?
Molecules of water.
What type of molecule is condensed to form Cellulose?
Glucose molecules.
What process links small molecules together to form polymer chains?
Addition polymerization.
All plastics are formed from chains of smaller molecules and belong to what major category of substances?
Polymers.
What analogy is used to describe a monomer?
A strand of paper clips.
What are the small molecules used to make the polymer chain called?
Monomers.
What is the definition of a polymer?
Polymers are large molecules made up of long chains of repeated groups of atoms.
What does the term "meros" mean in relation to both polymers and monomers?
Meros means "unit".
What does the prefix "poly" mean in relation to polymers?
Poly means "many".
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