3.3.12 Polymers Flashcards
How are addition polymers formed? Give an example.
Monomers with C=C bonds joined together to form polymers, eg. polyethene.
How are condensation polymers formed?
Made by repeated condensation reactions between monomers.
How are natural polymers formed?
Using the elimination of water.
How are condensation polymers identified?
By the monomers linked by ester or amide bonds.
What three pairs of monomers can form condensation polymers?
- Dicarboxylic acids and diols
- Dicarboxylic acids and diamines
- Amino acids
What are polyesters formed by?
The reaction between dicarboxylic acid monomers and diol monomers.
What link does polyesters have?
Ester link, COO.
What happens when a polyester is formed?
One of the OH groups and the H from the COOH groups form a water molecule and then the rest forms the polyester with the ester link in the middle.
What is an example of a polyester?
Terylene.
What are all the names for terylene?
Poly(ethylene terephthalate), PET, dacron.
What type of monomer can form a polymer with itself? Why?
Hydroxycarboxylic acids, they contain an OH and COOH group at each end.
What is a polyamide?
Polymers where repeating units are bonded together by amide links (CONH).
What is another name for an amide link?
A peptide link.
What are polyamides formed by?
Diamino acids and dicarboxylic acids.
What happens when a polyamide is formed?
