materials and ester bonds

• Name the polymer of ethene and draw the structure of the monomer.

  Poly(ethene); Monomer: Ethene (C2H4)
• By what process are polyesters formed?

  Condensation polymerisation.
• Why are polyesters considered condensation polymers?

  Because a small molecule (water) is released when the bond is formed between two monomers.
• What reactants are required to form a polyester?

  Molecules with two carboxylic acid groups (-COOH) and molecules with two alcohol groups (-OH).
• Describe the formation of an ester bond.

  • The carboxylic acid loses an OH from the COOH group.
  • The alcohol loses a H from the -OH group.
  • The two larger molecules combine, forming an ester bond.
  • The OH- and H+ molecules lost combine to make water.