Chemistry polymers

• Condensation polymerisation is when two monomers react to form one molecule, with the loss of water or another small molecule.
• Polyesters are made from condensation polymerisation
• What are polymers made up of?

  Polymers are made up of smaller units called monomers.
• Why are polymers considered a diverse group of substances?

  Because they make up all sorts of different materials and have various structures.
• What is an example of a polymer mentioned in the video?

  Polypropylene.
• How long can a single molecule of polypropylene be?

  A single molecule can be thousands of atoms long.
• What is the formula for the monomer propine?

  The formula is $C_3H_6$.
• How can you identify a polymer molecule?

  You can identify it by noticing a repeating monomer unit within the molecule.
• What does the letter 'n' represent when drawing a polymer?

  'n' represents the number of repeating units in the overall polymer.
• What notation is used to show repeating units in polymers?

  Curved brackets are used to show repeating units.
• What type of bonds are present within polymers?

  Polymers contain covalent bonds.
• What is required to melt or boil polymers?

  You need to break the intermolecular forces between separate polymer molecules.
• How do the melting and boiling points of polymers compare to giant covalent structures?

  Polymers have lower melting and boiling points than giant covalent structures like diamond.
• Why do polymers have higher melting and boiling points than simple molecular substances?

  Because polymers have a high surface area and many intermolecular forces to break.
• What are the two main types of polymers mentioned in the video?

  Addition polymers and condensation polymers.
• What is the general structure of a polymer molecule?

  • Composed of repeating monomer units
  • Long chains formed by covalent bonds
  • Identified by a repeating unit represented with 'n'
• What are the differences in melting and boiling points between polymers and other structures?

  • Polymers have lower melting/boiling points than giant covalent structures (e.g., diamond)
  • Polymers have higher melting/boiling points than simple molecular substances (e.g., oxygen)
  • Melting/boiling requires breaking weaker intermolecular forces, not covalent bonds